Backup failing for Google Cloud Storage

Charles     Apr 19 9:33PM 2017 GUI

When backing up to Google Cloud Storage I keep receiving timeouts that stop the backup process.

I receive a dialog along the lines of ERROR Failed to upload chunk [somechunkhash]: Put https://storage.googleapis.com/[location]/[chunkHash] dial tcp [someIPAddress/notMine]:443: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

This past time I received 3 put messages like this and 1 head message. All in the same dialog.

The log does not reflect these messages though. The last line is simply Failed to find the path for chunk [someChunkHash]: Head https://storage.googleapis.com/[location]/[chunkHash]: dial tcp [someIPAddress/NotMine]

The file before the error was slightly larger if that makes any difference (I do not remember the sizes of the last file in the log before this particular occurrence). 5,512,787,968 bytes. I have gigabit upload speed. Let me know if you need anymore information.


gchen    Apr 20 8:42AM 2017

I'm running some tests to reproduce it.


gchen    Apr 20 8:56PM 2017

All my tests passed without errors.

This looks more like temporary network issues. Did these errors happen when the backup was starting, or in the middle after the backup had been running for a while?


Charles    Apr 20 11:20PM 2017

I received this error on 2 different computers on 4 or 5 separate occasions now. I am using coldline storage. I have not had troubles with cloudberry using a similar setup. It happens after the backup has been running for a little while. The error interrupts the backup and it does not completely finish. I would say I've barely gotten through my larger backup, but the smaller one did eventually finish after several runs. If the exception could at least be handled in a way that the backup would continue to run, that would be nice. It does make me a little worried about the integrity of the upload though. Is there a way to verify already uploaded data?


Charles    Apr 21 8:55AM 2017

It's not always a big file. This past time it was after a 39 MB file.


gchen    Apr 21 9:45AM 2017

I didn't run the tests against the coldline storage. I'll try it now.

You can run this command to verify existing backups:

duplicacy check -files


Charles    Apr 24 12:11PM 2017

Any luck reproducing this?

I have gigabit internet (up and down). If you are having troubles reproducing it, I wonder if it could be a race condition that is harder to observe. I could try limiting the upload speed, though would prefer not to limit it at all.

It could for instance be a connection time out since my pc may be spending more time generating packets than uploading, leaving the connection idle for too long.


Charles    Apr 24 12:44PM 2017

Maybe not. Looking at the log files using a text editor, these lines are within a minute of each other.

2017-04-24 05:08:15.445 INFO UPLOAD_PROGRESS Uploaded chunk 109527 size 2638680, 46.39MB/s 1 day 05:50:44 8.6%

2017-04-24 05:08:36.468 ERROR UPLOAD_CHUNK Failed to upload the chunk 3dd5fb094eb7cc81c96b3adb9adb59d6967a253dc3a0aff22f355ab00050ac78: Put https://storage.googleapis.com/[redacted]/[redacted]/chunks/3dd5fb094eb7cc81c96b3adb9adb59d6967a253dc3a0aff22f355ab00050ac78: dial tcp 173.194.219.128:443: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.


Charles    Apr 24 1:05PM 2017

Perhaps it is still a rate issue though. Sort of like DOS prevention or something. To get an idea of how many requests I might be making per second, see the following 3 minutes worth of logs.

I also found this documentation about possible errors using Google Cloud Storage API and possible error 429--Too Many Requests https://cloud.google.com/storage/docs/json_api/v1/status-codes#429_Too_Many_Requests

It may be that the interoperability just doesn't return a pretty error message and cuts the connection.

Based on the following from that documentation

Trying to mutate a bucket's or object's metadata more than once per second.

Trying to compose objects at over 200 components per second.

It sounds to me like, if the name is not checked for with each upload (limit 2 per second), then it should be fine (because my 1 computer could never reach 200 puts per second). I may be interpreting this incorrectly though. I am not familiar with this stuff.

edit: Reading this again, I don't know that a check if file exists should count as a mutate/ modify. I do have a sneaky suspicion that I'm getting hit with some sort of rate limit though. As mentioned below, I will let you know if applying a rate limit helps.

Does passing in the "exclusive" flag skip the existing file check? I may just need to set this up using cli so I can pass that in if so. Limiting the speed would be the other option, but I couldn't really guarantee a number of API calls via bandwidth.

2017-04-21 20:33:00.037 INFO UPLOAD_PROGRESS Uploaded chunk 58966 size 1272683, 45.44MB/s 1 day 07:41:08 5.0%
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2017-04-21 20:36:11.347 ERROR UPLOAD_CHUNK Failed to upload the chunk


Charles    Apr 24 1:21PM 2017

That does not seem to be an option for the backup part of the CLI version. Also, it appears I would lose the ability to send e-mail notifications upon failure if I used the CLI version (and scheduling via a windows service, but I could run it via Task Scheduler).

For now I will limit my upload speed, but perhaps a api rate limit can be imposed for GCP or even better, an "exclusive" option for backups that will not perform the "file exists" api call when uploading which could also save some money on api calls (maybe not enough to matter).

edit: I will let you know if the rate limit helps.


gchen    Apr 24 7:17PM 2017

This is definitely caused by rate limiting on the server side.

Duplicacy uses goamz to access Google Cloud Storage. I think its retry mechanism can be improved to handle this rate limiting issue.


Charles    Apr 24 7:59PM 2017

Thanks for the confirmation.

I set a rate limit of 10000 KBps (should be 80 Mbps or roughly 10 MBps). I am still copying at speeds between 50 and 60 MBps. This isn't the first time I've had troubles getting settings from the GUI to apply to the backup process. I also had troubles with frequency.

I checked the schedule file in the .duplicacy folder and it seems to have applied okay.

{
   "backup_scheduled" : true,
   "rate_limit" : "10000",
   "retires" : 3,
   "enable_vss" : true,
   "email_options" : {

  "subject" : "",
  "from" : "",
  "to" : "",
  "username" : "",
  "server" : "",
  "failure_only" : false

}, "backup_frequency" : 86400, "prune_enabled" : true, "backup_threads" : 1, "prune_parameters" : [

  0,
  120,
  7,
  92,
  1,
  91

], "email_enabled" : false, "backup_time" : 60677, "backup_days" : 127 }


gchen    Apr 24 8:29PM 2017

Please try the latest build at https://github.com/gilbertchen/duplicacy-cli/releases

The option for rate limiting is -limit-rate. However, this only limits the rate of transferring bytes over the network. Since many chunks already exist on the storage, they are actually not uploaded but they are counted in the upload speed being displayed. Therefore, those upload speeds are alway significantly higher than the rate limit.


Charles    Apr 25 11:08AM 2017

Still failing at 10000 KBps. Same error message.

I don't know if this log info helps, but here it is.

2017-04-25 00:26:00.858 INFO UPLOAD_PROGRESS Uploaded chunk 114061 size 9710648, 40.24MB/s 1 day 10:15:32 9.0%
2017-04-25 00:26:02.016 INFO UPLOAD_PROGRESS Uploaded chunk 114062 size 3121269, 40.23MB/s 1 day 10:15:51 9.0%
2017-04-25 00:26:03.054 INFO UPLOAD_PROGRESS Uploaded chunk 114063 size 5961670, 40.23MB/s 1 day 10:16:00 9.0%
2017-04-25 00:26:04.843 INFO UPLOAD_PROGRESS Uploaded chunk 114064 size 16777216, 40.22MB/s 1 day 10:16:06 9.0%
2017-04-25 00:26:05.832 INFO UPLOAD_PROGRESS Uploaded chunk 114065 size 7156805, 40.22MB/s 1 day 10:16:14 9.0%
2017-04-25 00:26:06.224 INFO UPLOAD_PROGRESS Uploaded chunk 114066 size 2208678, 40.22MB/s 1 day 10:16:23 9.0%
2017-04-25 00:26:07.887 INFO UPLOAD_PROGRESS Uploaded chunk 114067 size 15252565, 40.22MB/s 1 day 10:16:29 9.0%
2017-04-25 00:26:08.589 INFO UPLOAD_PROGRESS Uploaded chunk 114068 size 5652306, 40.21MB/s 1 day 10:16:38 9.0%
2017-04-25 00:26:09.062 INFO UPLOAD_PROGRESS Uploaded chunk 114069 size 3153143, 40.21MB/s 1 day 10:16:47 9.0%
2017-04-25 00:26:09.347 INFO UPLOAD_PROGRESS Uploaded chunk 114070 size 1307461, 40.21MB/s 1 day 10:16:47 9.0%
2017-04-25 00:26:09.841 INFO UPLOAD_PROGRESS Uploaded chunk 114071 size 3102476, 40.21MB/s 1 day 10:16:46 9.0%
2017-04-25 00:26:10.377 INFO UPLOAD_PROGRESS Uploaded chunk 114072 size 3376395, 40.21MB/s 1 day 10:16:55 9.0%
2017-04-25 00:26:10.812 INFO UPLOAD_PROGRESS Uploaded chunk 114073 size 2695242, 40.21MB/s 1 day 10:16:54 9.0%
2017-04-25 00:26:11.241 INFO UPLOAD_PROGRESS Uploaded chunk 114074 size 2599460, 40.21MB/s 1 day 10:17:04 9.0%
2017-04-25 00:26:12.472 INFO UPLOAD_PROGRESS Uploaded chunk 114075 size 11243435, 40.20MB/s 1 day 10:17:11 9.0%
2017-04-25 00:26:12.954 INFO UPLOAD_PROGRESS Uploaded chunk 114076 size 3004988, 40.20MB/s 1 day 10:17:10 9.0%
2017-04-25 00:26:13.540 INFO UPLOAD_PROGRESS Uploaded chunk 114077 size 4538367, 40.20MB/s 1 day 10:17:19 9.0%
2017-04-25 00:26:14.511 INFO UPLOAD_PROGRESS Uploaded chunk 114078 size 6338832, 40.20MB/s 1 day 10:17:27 9.0%
2017-04-25 00:26:15.315 INFO UPLOAD_PROGRESS Uploaded chunk 114079 size 6562701, 40.19MB/s 1 day 10:17:35 9.0%
2017-04-25 00:26:16.067 INFO UPLOAD_PROGRESS Uploaded chunk 114080 size 3029580, 40.19MB/s 1 day 10:17:45 9.0%
2017-04-25 00:26:17.009 INFO UPLOAD_PROGRESS Uploaded chunk 114081 size 1926082, 40.19MB/s 1 day 10:17:54 9.0%
2017-04-25 00:26:17.504 INFO UPLOAD_PROGRESS Uploaded chunk 114082 size 2824735, 40.19MB/s 1 day 10:17:53 9.0%
2017-04-25 00:26:18.521 INFO UPLOAD_PROGRESS Uploaded chunk 114083 size 8780378, 40.19MB/s 1 day 10:18:01 9.0%
2017-04-25 00:26:18.913 INFO UPLOAD_PROGRESS Uploaded chunk 114084 size 1983981, 40.19MB/s 1 day 10:18:01 9.0%
2017-04-25 00:26:20.186 INFO UPLOAD_PROGRESS Uploaded chunk 114085 size 11246045, 40.18MB/s 1 day 10:18:18 9.0%
2017-04-25 00:26:20.737 INFO UPLOAD_PROGRESS Uploaded chunk 114086 size 1305542, 40.18MB/s 1 day 10:18:17 9.0%
2017-04-25 00:26:22.050 INFO UPLOAD_PROGRESS Uploaded chunk 114087 size 11646296, 40.18MB/s 1 day 10:18:35 9.0%
2017-04-25 00:26:22.919 INFO UPLOAD_PROGRESS Uploaded chunk 114088 size 7269006, 40.18MB/s 1 day 10:18:33 9.0%
2017-04-25 00:26:23.521 INFO UPLOAD_PROGRESS Uploaded chunk 114089 size 4780615, 40.17MB/s 1 day 10:18:41 9.0%
2017-04-25 00:26:23.821 INFO UPLOAD_PROGRESS Uploaded chunk 114090 size 1163609, 40.17MB/s 1 day 10:18:41 9.0%
2017-04-25 00:26:24.642 INFO UPLOAD_PROGRESS Uploaded chunk 114091 size 6456576, 40.17MB/s 1 day 10:18:49 9.0%
2017-04-25 00:26:26.208 INFO UPLOAD_PROGRESS Uploaded chunk 114092 size 14300276, 40.16MB/s 1 day 10:19:06 9.0%
2017-04-25 00:26:27.304 INFO UPLOAD_PROGRESS Uploaded chunk 114093 size 9713777, 40.16MB/s 1 day 10:19:13 9.0%
2017-04-25 00:26:27.575 INFO UPLOAD_PROGRESS Uploaded chunk 114094 size 1096103, 40.16MB/s 1 day 10:19:13 9.0%
2017-04-25 00:26:28.109 INFO UPLOAD_PROGRESS Uploaded chunk 114095 size 3860574, 40.16MB/s 1 day 10:19:22 9.0%
2017-04-25 00:26:28.885 INFO UPLOAD_PROGRESS Uploaded chunk 114096 size 2888449, 40.16MB/s 1 day 10:19:21 9.0%
2017-04-25 00:26:30.172 INFO UPLOAD_PROGRESS Uploaded chunk 114097 size 11611887, 40.15MB/s 1 day 10:19:38 9.0%
2017-04-25 00:26:31.570 INFO UPLOAD_PROGRESS Uploaded chunk 114098 size 13059774, 40.15MB/s 1 day 10:19:45 9.0%
2017-04-25 00:26:32.015 INFO UPLOAD_PROGRESS Uploaded chunk 114099 size 3023350, 40.15MB/s 1 day 10:19:54 9.0%
2017-04-25 00:26:32.737 INFO UPLOAD_PROGRESS Uploaded chunk 114100 size 5565408, 40.15MB/s 1 day 10:19:53 9.0%
2017-04-25 00:26:33.769 INFO UPLOAD_PROGRESS Uploaded chunk 114101 size 9220030, 40.15MB/s 1 day 10:20:00 9.0%
2017-04-25 00:26:34.786 INFO UPLOAD_PROGRESS Uploaded chunk 114102 size 3301334, 40.14MB/s 1 day 10:20:09 9.0%
2017-04-25 00:26:35.218 INFO UPLOAD_PROGRESS Uploaded chunk 114103 size 2431739, 40.14MB/s 1 day 10:20:19 9.0%
2017-04-25 00:26:35.840 INFO UPLOAD_PROGRESS Uploaded chunk 114104 size 4356261, 40.14MB/s 1 day 10:20:18 9.0%
2017-04-25 00:26:36.145 INFO UPLOAD_PROGRESS Uploaded chunk 114105 size 1054372, 40.14MB/s 1 day 10:20:27 9.0%
2017-04-25 00:26:37.415 INFO UPLOAD_PROGRESS Uploaded chunk 114106 size 11418260, 40.14MB/s 1 day 10:20:34 9.0%
2017-04-25 00:26:38.287 INFO UPLOAD_PROGRESS Uploaded chunk 114107 size 7084017, 40.13MB/s 1 day 10:20:43 9.0%
2017-04-25 00:26:39.102 INFO UPLOAD_PROGRESS Uploaded chunk 114108 size 6445595, 40.13MB/s 1 day 10:20:51 9.0%
2017-04-25 00:26:39.751 INFO UPLOAD_PROGRESS Uploaded chunk 114109 size 3899959, 40.13MB/s 1 day 10:20:50 9.0%
2017-04-25 00:26:40.103 INFO UPLOAD_PROGRESS Uploaded chunk 114110 size 1691228, 40.13MB/s 1 day 10:21:00 9.0%
2017-04-25 00:26:40.702 INFO UPLOAD_PROGRESS Uploaded chunk 114111 size 4889830, 40.13MB/s 1 day 10:20:58 9.0%
2017-04-25 00:26:41.137 INFO UPLOAD_PROGRESS Uploaded chunk 114112 size 2494939, 40.12MB/s 1 day 10:21:08 9.0%
2017-04-25 00:26:41.522 INFO UPLOAD_PROGRESS Uploaded chunk 114113 size 1930320, 40.12MB/s 1 day 10:21:07 9.0%
2017-04-25 00:26:42.158 INFO UPLOAD_PROGRESS Uploaded chunk 114114 size 5146836, 40.12MB/s 1 day 10:21:16 9.0%
2017-04-25 00:26:42.976 INFO UPLOAD_PROGRESS Uploaded chunk 114115 size 6789722, 40.12MB/s 1 day 10:21:14 9.0%
2017-04-25 00:26:44.156 INFO UPLOAD_PROGRESS Uploaded chunk 114116 size 10255870, 40.12MB/s 1 day 10:21:31 9.0%
2017-04-25 00:26:44.460 INFO UPLOAD_PROGRESS Uploaded chunk 114117 size 1125725, 40.12MB/s 1 day 10:21:31 9.0%
2017-04-25 00:26:44.867 INFO UPLOAD_PROGRESS Uploaded chunk 114118 size 1793175, 40.12MB/s 1 day 10:21:31 9.0%
2017-04-25 00:26:45.183 INFO UPLOAD_PROGRESS Uploaded chunk 114119 size 1626726, 40.11MB/s 1 day 10:21:40 9.0%
2017-04-25 00:26:47.060 INFO UPLOAD_PROGRESS Uploaded chunk 114120 size 16777216, 40.11MB/s 1 day 10:21:56 9.0%
2017-04-25 00:26:47.411 INFO UPLOAD_PROGRESS Uploaded chunk 114121 size 1831570, 40.11MB/s 1 day 10:21:55 9.0%
2017-04-25 00:26:47.966 INFO UPLOAD_PROGRESS Uploaded chunk 114122 size 3822479, 40.11MB/s 1 day 10:21:54 9.0%
2017-04-25 00:26:48.522 INFO UPLOAD_PROGRESS Uploaded chunk 114123 size 3972755, 40.11MB/s 1 day 10:22:03 9.0%
2017-04-25 00:26:50.112 INFO UPLOAD_PROGRESS Uploaded chunk 114124 size 14756914, 40.10MB/s 1 day 10:22:20 9.0%
2017-04-25 00:26:50.678 INFO UPLOAD_PROGRESS Uploaded chunk 114125 size 1055295, 40.10MB/s 1 day 10:22:19 9.0%
2017-04-25 00:26:51.946 INFO UPLOAD_PROGRESS Uploaded chunk 114126 size 11608608, 40.10MB/s 1 day 10:22:26 9.0%
2017-04-25 00:26:52.457 INFO UPLOAD_PROGRESS Uploaded chunk 114127 size 3623483, 40.10MB/s 1 day 10:22:35 9.0%
2017-04-25 00:26:53.869 INFO UPLOAD_PROGRESS Uploaded chunk 114128 size 12629679, 40.09MB/s 1 day 10:22:42 9.0%
2017-04-25 00:26:54.285 INFO UPLOAD_PROGRESS Uploaded chunk 114129 size 2081237, 40.09MB/s 1 day 10:22:52 9.0%
2017-04-25 00:26:54.873 INFO UPLOAD_PROGRESS Uploaded chunk 114130 size 3056207, 40.09MB/s 1 day 10:22:51 9.0%
2017-04-25 00:26:55.333 INFO UPLOAD_PROGRESS Uploaded chunk 114131 size 3219691, 40.09MB/s 1 day 10:23:00 9.0%
2017-04-25 00:26:55.677 INFO UPLOAD_PROGRESS Uploaded chunk 114132 size 1481414, 40.09MB/s 1 day 10:23:00 9.0%
2017-04-25 00:26:56.202 INFO UPLOAD_PROGRESS Uploaded chunk 114133 size 3662514, 40.08MB/s 1 day 10:23:09 9.0%
2017-04-25 00:26:56.606 INFO UPLOAD_PROGRESS Uploaded chunk 114134 size 2271229, 40.08MB/s 1 day 10:23:08 9.0%
2017-04-25 00:26:58.216 INFO UPLOAD_PROGRESS Uploaded chunk 114135 size 15007075, 40.08MB/s 1 day 10:23:24 9.0%
2017-04-25 00:26:58.825 INFO UPLOAD_PROGRESS Uploaded chunk 114136 size 4775203, 40.08MB/s 1 day 10:23:23 9.0%
2017-04-25 00:26:59.467 INFO UPLOAD_PROGRESS Uploaded chunk 114137 size 3594666, 40.08MB/s 1 day 10:23:32 9.0%
2017-04-25 00:26:59.808 INFO UPLOAD_PROGRESS Uploaded chunk 114138 size 1758991, 40.08MB/s 1 day 10:23:32 9.0%
2017-04-25 00:27:00.343 INFO UPLOAD_PROGRESS Uploaded chunk 114139 size 3764498, 40.07MB/s 1 day 10:23:41 9.0%
2017-04-25 00:27:00.952 INFO UPLOAD_PROGRESS Uploaded chunk 114140 size 1848469, 40.07MB/s 1 day 10:23:40 9.0%
2017-04-25 00:27:02.123 INFO UPLOAD_PROGRESS Uploaded chunk 114141 size 10159956, 40.07MB/s 1 day 10:23:57 9.0%
2017-04-25 00:27:02.520 INFO UPLOAD_PROGRESS Uploaded chunk 114142 size 2312260, 40.07MB/s 1 day 10:23:57 9.0%
2017-04-25 00:27:03.449 INFO UPLOAD_PROGRESS Uploaded chunk 114143 size 7909862, 40.07MB/s 1 day 10:24:05 9.0%
2017-04-25 00:27:03.888 INFO UPLOAD_PROGRESS Uploaded chunk 114144 size 2067322, 40.07MB/s 1 day 10:24:04 9.0%
2017-04-25 00:27:04.889 INFO UPLOAD_PROGRESS Uploaded chunk 114145 size 8675153, 40.06MB/s 1 day 10:24:12 9.0%
2017-04-25 00:27:05.320 INFO UPLOAD_PROGRESS Uploaded chunk 114146 size 2313180, 40.06MB/s 1 day 10:24:21 9.0%
2017-04-25 00:27:05.946 INFO UPLOAD_PROGRESS Uploaded chunk 114147 size 2802832, 40.06MB/s 1 day 10:24:21 9.0%
2017-04-25 00:27:06.781 INFO UPLOAD_PROGRESS Uploaded chunk 114148 size 6352424, 40.06MB/s 1 day 10:24:29 9.0%
2017-04-25 00:27:07.403 INFO UPLOAD_PROGRESS Uploaded chunk 114149 size 5126147, 40.06MB/s 1 day 10:24:38 9.0%
2017-04-25 00:27:07.722 INFO UPLOAD_PROGRESS Uploaded chunk 114150 size 1716056, 40.06MB/s 1 day 10:24:37 9.0%
2017-04-25 00:27:08.166 INFO UPLOAD_PROGRESS Uploaded chunk 114151 size 3062477, 40.05MB/s 1 day 10:24:47 9.0%
2017-04-25 00:27:08.598 INFO UPLOAD_PROGRESS Uploaded chunk 114152 size 1911408, 40.05MB/s 1 day 10:24:46 9.0%
2017-04-25 00:27:09.414 INFO UPLOAD_PROGRESS Uploaded chunk 114153 size 1204325, 40.05MB/s 1 day 10:24:56 9.0%
2017-04-25 00:27:10.097 INFO UPLOAD_PROGRESS Uploaded chunk 114154 size 5384198, 40.05MB/s 1 day 10:25:04 9.0%
2017-04-25 00:27:10.716 INFO UPLOAD_PROGRESS Uploaded chunk 114155 size 4332229, 40.05MB/s 1 day 10:25:03 9.0%
2017-04-25 00:27:12.046 INFO UPLOAD_PROGRESS Uploaded chunk 114156 size 12038008, 40.04MB/s 1 day 10:25:20 9.0%
2017-04-25 00:27:12.716 INFO UPLOAD_PROGRESS Uploaded chunk 114157 size 2685237, 40.04MB/s 1 day 10:25:19 9.0%
2017-04-25 00:27:13.043 INFO UPLOAD_PROGRESS Uploaded chunk 114158 size 1614499, 40.04MB/s 1 day 10:25:29 9.0%
2017-04-25 00:27:13.334 INFO UPLOAD_PROGRESS Uploaded chunk 114159 size 1060100, 40.04MB/s 1 day 10:25:29 9.0%
2017-04-25 00:27:13.829 INFO UPLOAD_PROGRESS Uploaded chunk 114160 size 3631357, 40.04MB/s 1 day 10:25:28 9.0%
2017-04-25 00:27:14.443 INFO UPLOAD_PROGRESS Uploaded chunk 114161 size 4318202, 40.04MB/s 1 day 10:25:37 9.0%
2017-04-25 00:27:15.273 INFO UPLOAD_PROGRESS Uploaded chunk 114162 size 7139175, 40.03MB/s 1 day 10:25:45 9.0%
2017-04-25 00:27:15.869 INFO UPLOAD_PROGRESS Uploaded chunk 114163 size 4229144, 40.03MB/s 1 day 10:25:44 9.0%
2017-04-25 00:27:16.536 INFO UPLOAD_PROGRESS Uploaded chunk 114164 size 5224605, 40.03MB/s 1 day 10:25:52 9.0%
2017-04-25 00:27:17.774 INFO UPLOAD_PROGRESS Uploaded chunk 114165 size 11492457, 40.03MB/s 1 day 10:25:59 9.0%
2017-04-25 00:27:18.834 INFO UPLOAD_PROGRESS Uploaded chunk 114166 size 9342994, 40.03MB/s 1 day 10:26:07 9.0%
2017-04-25 00:27:19.600 INFO UPLOAD_PROGRESS Uploaded chunk 114167 size 5620592, 40.02MB/s 1 day 10:26:15 9.0%
2017-04-25 00:27:19.990 INFO UPLOAD_PROGRESS Uploaded chunk 114168 size 2189957, 40.02MB/s 1 day 10:26:15 9.0%
2017-04-25 00:27:20.684 INFO UPLOAD_PROGRESS Uploaded chunk 114169 size 5035737, 40.02MB/s 1 day 10:26:24 9.0%
2017-04-25 00:27:21.156 INFO UPLOAD_PROGRESS Uploaded chunk 114170 size 2858383, 40.02MB/s 1 day 10:26:33 9.0%
2017-04-25 00:27:21.485 INFO UPLOAD_PROGRESS Uploaded chunk 114171 size 1398414, 40.02MB/s 1 day 10:26:33 9.0%
2017-04-25 00:27:21.763 INFO UPLOAD_PROGRESS Uploaded chunk 114172 size 1105100, 40.02MB/s 1 day 10:26:32 9.0%
2017-04-25 00:27:22.130 INFO UPLOAD_PROGRESS Uploaded chunk 114173 size 1792441, 40.01MB/s 1 day 10:26:42 9.0%
2017-04-25 00:27:23.051 INFO UPLOAD_PROGRESS Uploaded chunk 114174 size 7923683, 40.01MB/s 1 day 10:26:50 9.0%
2017-04-25 00:27:23.997 INFO UPLOAD_PROGRESS Uploaded chunk 114175 size 7082990, 40.01MB/s 1 day 10:26:48 9.0%
2017-04-25 00:27:24.580 INFO UPLOAD_PROGRESS Uploaded chunk 114176 size 4503195, 40.01MB/s 1 day 10:26:57 9.0%
2017-04-25 00:27:25.167 INFO UPLOAD_PROGRESS Uploaded chunk 114177 size 4598736, 40.01MB/s 1 day 10:27:06 9.0%
2017-04-25 00:27:25.760 INFO UPLOAD_PROGRESS Uploaded chunk 114178 size 4446811, 40.01MB/s 1 day 10:27:04 9.0%
2017-04-25 00:27:26.202 INFO UPLOAD_PROGRESS Uploaded chunk 114179 size 2834262, 40.00MB/s 1 day 10:27:14 9.0%
2017-04-25 00:27:26.805 INFO UPLOAD_PROGRESS Uploaded chunk 114180 size 4119379, 40.00MB/s 1 day 10:27:13 9.0%
2017-04-25 00:27:27.146 INFO UPLOAD_PROGRESS Uploaded chunk 114181 size 1128394, 40.00MB/s 1 day 10:27:22 9.0%
2017-04-25 00:27:27.721 INFO UPLOAD_PROGRESS Uploaded chunk 114182 size 4108835, 40.00MB/s 1 day 10:27:21 9.0%
2017-04-25 00:27:28.161 INFO UPLOAD_PROGRESS Uploaded chunk 114183 size 2383326, 40.00MB/s 1 day 10:27:31 9.0%
2017-04-25 00:27:28.828 INFO UPLOAD_PROGRESS Uploaded chunk 114184 size 2241554, 40.00MB/s 1 day 10:27:30 9.0%
2017-04-25 00:27:29.310 INFO UPLOAD_PROGRESS Uploaded chunk 114185 size 3381778, 40.00MB/s 1 day 10:27:39 9.0%
2017-04-25 00:27:30.932 INFO UPLOAD_PROGRESS Uploaded chunk 114186 size 15326831, 39.99MB/s 1 day 10:27:45 9.0%
2017-04-25 00:27:31.576 INFO UPLOAD_PROGRESS Uploaded chunk 114187 size 5102852, 39.99MB/s 1 day 10:27:54 9.0%
2017-04-25 00:27:32.496 INFO UPLOAD_PROGRESS Uploaded chunk 114188 size 7535392, 39.99MB/s 1 day 10:28:02 9.0%
2017-04-25 00:27:32.923 INFO UPLOAD_PROGRESS Uploaded chunk 114189 size 2096902, 39.99MB/s 1 day 10:28:01 9.0%
2017-04-25 00:27:33.540 INFO UPLOAD_PROGRESS Uploaded chunk 114190 size 2043588, 39.98MB/s 1 day 10:28:11 9.0%
2017-04-25 00:27:34.110 INFO UPLOAD_PROGRESS Uploaded chunk 114191 size 4607881, 39.98MB/s 1 day 10:28:20 9.0%
2017-04-25 00:27:34.789 INFO UPLOAD_PROGRESS Uploaded chunk 114192 size 5486218, 39.98MB/s 1 day 10:28:18 9.0%
2017-04-25 00:27:35.402 INFO UPLOAD_PROGRESS Uploaded chunk 114193 size 4411294, 39.98MB/s 1 day 10:28:27 9.0%
2017-04-25 00:27:35.752 INFO UPLOAD_PROGRESS Uploaded chunk 114194 size 1585039, 39.98MB/s 1 day 10:28:27 9.0%
2017-04-25 00:27:56.749 ERROR UPLOAD_CHUNK Failed to upload the chunk 7708989e2e517dd31b0baed6733c6797193c0a1865431ec5b300cdf0ea977001: Put https://storage.googleapis.com/[redacted]/[redacted]/chunks/7708989e2e517dd31b0baed6733c6797193c0a1865431ec5b300cdf0ea977001: dial tcp 173.194.219.128:443: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.


gchen    Apr 25 12:46PM 2017

Are you running the latest 1.2.5 version? The time between the failure and the last successful upload was about 21 seconds (27:35 -> 27:56), but in the latest 1.2.5 version the retry mechanism has been changed to allow for 8 attempts and a maximum wait of 5 minutes.


Charles    Apr 25 3:07PM 2017

I was using the GUI version. I downloaded the CLI version you mentioned after the test with the GUI version where I throttled the upload speed. The CLI version doesn't seem to produce the text log, but it also failed. I did at least use the -stats flag.

I didn't see a way to turn on the log similar to the gui version in the documentation.

Terminal out put of \Scripts\Duplicacy\duplicacy_win_x64_1.2.5.exe backup -vss -stats -limit-rate 12500

Skipped chunk 3329 size 11383365, 42.08MB/s 1 day 10:19:54 0.3%
Skipped chunk 3330 size 1210868, 42.08MB/s 1 day 10:19:45 0.3%
Skipped chunk 3331 size 6784692, 42.10MB/s 1 day 10:18:56 0.3%
Skipped chunk 3332 size 2596051, 42.10MB/s 1 day 10:18:37 0.3%
Skipped chunk 3333 size 1692088, 42.11MB/s 1 day 10:18:25 0.3%
Skipped chunk 3334 size 7616082, 42.13MB/s 1 day 10:17:30 0.3%
Skipped chunk 3335 size 1433062, 42.13MB/s 1 day 10:17:20 0.3%
Skipped chunk 3336 size 8380075, 42.15MB/s 1 day 10:16:20 0.3%
Skipped chunk 3337 size 3969406, 42.05MB/s 1 day 10:21:08 0.3%
Skipped chunk 3338 size 1237734, 42.05MB/s 1 day 10:20:59 0.3%
Skipped chunk 3339 size 13561563, 42.09MB/s 1 day 10:19:22 0.3%
Skipped chunk 3340 size 1069825, 42.09MB/s 1 day 10:19:14 0.3%
Skipped chunk 3341 size 1177936, 42.09MB/s 1 day 10:19:05 0.3%
Skipped chunk 3342 size 1902182, 42.10MB/s 1 day 10:18:52 0.3%
Failed to find the path for the chunk e5f69f43124ce626ca70dc8b5c6579bd39718a9cfb
c591bc80c9c0a076f411b8: Head https://storage.googleapis.com/[redacted]/[redacted]/chunks/e5f69f43124ce626ca70dc8b5c6579bd39718a9cfbc591bc80c9c0a076f411b8: dial
 tcp 74.125.21.128:443: connectex: A connection attempt failed because the conne
cted party did not properly respond after a period of time, or established conne
ction failed because connected host has failed to respond.


Charles    Apr 25 3:52PM 2017

This may be a wild shot in the dark, but another idea occurs to me.

Okay, so it looks like the app is trying to dial tcp 74.125.21.128:443 directly. Is the ip address resolved and stored somewhere for repeat usage throughout the backup process? If so, maybe it needs to be re-resolved. I just performed some rudimentary test where I ran nslookup and pinged storage.googleapis.com a few times in a few different ways. I noticed that each time I pinged it, I sometimes resolved a different address (see output below).

Perhaps google tries to load balance by dropping connections on one IP, forcing the clients to choose the next ip available in the list. This is just speculation though.

https://serverfault.com/questions/102879/how-do-dns-clients-choose-an-ip-address-when-they-get-multiple-answers "A client program picking an IP address from a list (of A/AAAA-records) will generally try the addresses in the order they where returned by the DNS server (round robin). If the client cannot connect to the first IP address returned, it should try the second and so on. For example all major browsers do this, however many other Internet client programs "forget" this step and fail if they cannot connect to the first IP address."

>ping storage.googleapis.com

Pinging storage.l.googleusercontent.com [173.194.219.128] with 32 bytes of data:

Reply from 173.194.219.128: bytes=32 time=5ms TTL=45
Reply from 173.194.219.128: bytes=32 time=4ms TTL=45
Reply from 173.194.219.128: bytes=32 time=4ms TTL=45
Reply from 173.194.219.128: bytes=32 time=4ms TTL=45

Ping statistics for 173.194.219.128:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 4ms, Maximum = 5ms, Average = 4ms

-------------------------

>ping storage.googleapis.com

Pinging storage.l.googleusercontent.com [74.125.21.128] with 32 bytes of data:
Reply from 74.125.21.128: bytes=32 time=5ms TTL=45
Reply from 74.125.21.128: bytes=32 time=4ms TTL=45
Reply from 74.125.21.128: bytes=32 time=5ms TTL=45
Reply from 74.125.21.128: bytes=32 time=5ms TTL=45

Ping statistics for 74.125.21.128:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 4ms, Maximum = 5ms, Average = 4ms


gchen    Apr 25 4:05PM 2017

Can you run the CLI version with the -log option to see if the retry mechanism is working:

\Scripts\Duplicacy\duplicacy_win_x64_1.2.5.exe -log backup -vss -stats

The -limit-rate option is not needed because it doesn't actually limit the API call rates.

It is possible that they do rate limiting by forcing you to switch to a different IP, but this should have been handled gracefully by the retry mechanism. I think the right solution is to use the official google client to access Google Cloud Storage, instead of relying on a third-party S3 client like goamz.


Charles    Apr 25 4:53PM 2017

Ah. Running it again with -log, though it is obviously going to fail again, we can at least look for the change you are expecting.

I agree that using the Google Cloud official API's instead of S3 interoperability would be a great thing to have in there. I used Cloudberry with Google Cloud Storage which doesn't use S3 interoperability with no problems and it completed the 5TB initial backup in less than 24 hours. I went to sleep and woke up and it was done. (that said, I would much rather use this). If we can't get this working as is, I would be willing to stick around to see the completion of an official Google Storage API integration (depending on how long that would take).


Charles    Apr 26 8:32AM 2017

It doesn't look like it is working at all now.

2017-04-25 19:59:07.346 INFO UPLOAD_PROGRESS Skipped chunk 10537 size 3900210, 3
9.17MB/s 1 day 12:37:34 0.9%
2017-04-25 19:59:07.402 INFO UPLOAD_PROGRESS Skipped chunk 10538 size 2112008, 3
9.17MB/s 1 day 12:37:29 0.9%
2017-04-25 19:59:07.491 INFO UPLOAD_PROGRESS Skipped chunk 10539 size 3530716, 3
9.18MB/s 1 day 12:37:21 0.9%
2017-04-25 19:59:07.657 INFO UPLOAD_PROGRESS Skipped chunk 10540 size 8385868, 3
9.18MB/s 1 day 12:37:00 0.9%
2017-04-25 19:59:07.728 INFO UPLOAD_PROGRESS Skipped chunk 10541 size 3612533, 3
9.18MB/s 1 day 12:36:51 0.9%
2017-04-25 19:59:07.950 INFO UPLOAD_PROGRESS Skipped chunk 10542 size 7704403, 3
9.19MB/s 1 day 12:36:32 0.9%
2017-04-25 19:59:08.023 INFO UPLOAD_PROGRESS Skipped chunk 10543 size 5135929, 3
9.16MB/s 1 day 12:37:59 0.9%
2017-04-25 19:59:08.201 INFO UPLOAD_PROGRESS Skipped chunk 10544 size 9810784, 3
9.17MB/s 1 day 12:37:35 0.9%
2017-04-25 19:59:08.277 INFO UPLOAD_PROGRESS Skipped chunk 10545 size 3463709, 3
9.17MB/s 1 day 12:37:27 0.9%
2017-04-25 19:59:08.566 INFO UPLOAD_PROGRESS Skipped chunk 10546 size 16777216,
39.19MB/s 1 day 12:36:46 0.9%
2017-04-25 19:59:08.643 INFO UPLOAD_PROGRESS Skipped chunk 10547 size 2249968, 3
9.19MB/s 1 day 12:36:40 0.9%
2017-04-25 19:59:08.751 INFO UPLOAD_PROGRESS Skipped chunk 10548 size 5949424, 3
9.19MB/s 1 day 12:36:26 0.9%
2017-04-25 19:59:08.859 INFO UPLOAD_PROGRESS Skipped chunk 10549 size 5380412, 3
9.20MB/s 1 day 12:36:13 0.9%
2017-04-25 19:59:29.899 ERROR UPLOAD_CHUNK Failed to find the path for the chunk
 14cc12c7da7ecd9745bc46d64e58d6fe7211b5a541a260ec65cf5582649a7eb7: Head https://
storage.googleapis.com/[redacted]/[redacted]/chunks/14cc12c7da7ecd9745bc46d64e5
8d6fe7211b5a541a260ec65cf5582649a7eb7: dial tcp 74.125.21.128:443: connectex: A
connection attempt failed because the connected party did not properly respond a
fter a period of time, or established connection failed because connected host h
as failed to respond.


gchen    Apr 26 11:08AM 2017

So the retry mechanism didn't kick in. I found out that the shouldRetry function didn't catch the error (type *net.OpError with Op being "dial").

Please download the rebuilt 1.2.5 version (fixed by this commit) and try it again.

I've also started working on a new GCS storage based on the official Google client library. Normally this is at most one-day work but I'm busy with a big job (multithreaded downloading/uploading for all storages), so it will probably be done by next week.


Charles    Apr 26 12:08PM 2017

Thanks a ton! I'll give it a try.

A week sounds pretty fast to me. The multithreading sounds great too!


Charles    Apr 26 7:44PM 2017

Well it's been running for quite some time now. Looks like it may be working.


Charles    Apr 27 9:28AM 2017

I'd say the fix is a success since it ran all night. It does seem like it is going to take quite some time though. (only a few days, so not that bad)

I stopped the process just now. I am going to wait to test the multithreading changes. Speed is an important factor. I need to know that I can throw a fist full of new data at it and not have to worry about my data not being backed up for a week or so while the process runs. I know I could create multiple backup sets, and I used to, but this option doesn't solve the problem as well as it used to due to personal workflow changes.


Charles    May 5 6:43PM 2017

Not to sound impatient because I thought your original estimate of the changes was kind of short anyway, but any word on the next release with multithreading and new GCP support? I'm waiting on this before finishing my testing.


gchen    May 6 3:47PM 2017

I finished the code changes for the multithreading support. Working on tests now and I hope to get the new version ready by the end of next week at the latest. The new GCP backend should also be out about the same time if everything goes as planned.


gchen    May 14 9:27PM 2017

Version 2.0.0 (CLI only) is now available on the github page. The -threads option is now supported by all storage backends for both the backup and the restore commands.

To use the new GCS backend, set the storage url to gcs://bucket. You will need a token file, which can be downloaded by either authorizing Dupliacy to access your Google Cloud Storage account or by downloading it from your Google service account page.

Please let me know if you find any issues.


Charles    May 15 11:34AM 2017

I have the token registered. Does this only support the root directory of the bucket? Currently I am in a directory 1 level beyond the root. I tried setting the storage to gcs://duplicacy/myFolderName, but receive the following error.

2017-05-15 12:29:56.333 ERROR STORAGE_CONFIG Failed to download the configuration file from the storage: googleapi: Error 400: Invalid bucket name: 'duplicacy/aydindirl-dc', invalid


Charles    May 15 11:39AM 2017

PS without the /myFolderName, it of course just says that it has not been initialized.


gchen    May 15 9:59PM 2017

I redid the 2.0.0 release. It should now accept a storage path after the bucket in the GCS storage url.


Charles    May 16 9:19AM 2017

Seems to be working. I gave it 8 threads and over 5 TB to run until completion this time.

This warning message is a bit odd, but it didn't prevent it from running. Almost looks like it tried to scan the .duplicacy directory.

2017-05-16 08:14:53.593 INFO VSS_CREATE Creating a shadow copy for E:\ 2017-05-16 08:15:03.493 INFO VSS_DONE Shadow copy {15673AD1-7260-48E6-A415-8B782261620C} created 2017-05-16 08:15:03.494 INFO BACKUP_INDEXING Indexing E:\ 2017-05-16 08:15:03.542 INFO SNAPSHOT_FILTER Loaded 8 include/exclude pattern(s) 2017-05-16 08:19:39.194 INFO LIST_ATTRIBUTES Discarding file attributes 2017-05-16 08:20:53.327 WARN LIST_FAILURE Failed to list subdirectory: open E:\/.duplicacy\shadow\/System Volume Information: Access is denied.


gchen    May 16 10:30AM 2017

Earlier versions of Go have trouble accessing the UNC paths to shadow volumes (such as \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy16) so a symbolic link .duplicacy\shadow has to be created which points to the newly created shadow volume. When it reads E:\/.duplicacy\shadow\/System Volume Information, it is just a shadow copy of E:\System Volume Information.


Charles    May 17 8:24AM 2017

2017-05-16 18:57:31.352 INFO UPLOAD_PROGRESS Uploaded chunk 301210 size 4778347, 35.97MB/s 1 day 07:37:14 25.1%
2017-05-16 18:57:31.687 INFO UPLOAD_PROGRESS Uploaded chunk 301211 size 2300343, 35.97MB/s 1 day 07:37:14 25.1%
2017-05-16 18:57:32.906 INFO UPLOAD_PROGRESS Uploaded chunk 301212 size 6354316, 35.97MB/s 1 day 07:37:16 25.1%
2017-05-16 18:57:33.345 INFO UPLOAD_PROGRESS Uploaded chunk 301213 size 4656704, 35.97MB/s 1 day 07:37:19 25.1%
2017-05-16 18:57:33.707 INFO UPLOAD_PROGRESS Uploaded chunk 301214 size 2680479, 35.97MB/s 1 day 07:37:19 25.1%
2017-05-16 18:57:34.101 INFO UPLOAD_PROGRESS Uploaded chunk 301215 size 6142834, 35.97MB/s 1 day 07:37:21 25.1%
2017-05-16 18:57:34.979 INFO UPLOAD_PROGRESS Uploaded chunk 301216 size 11652732, 35.97MB/s 1 day 07:37:20 25.1%
2017-05-16 18:57:35.811 INFO UPLOAD_PROGRESS Uploaded chunk 301217 size 10109932, 35.97MB/s 1 day 07:37:22 25.1%
2017-05-16 18:57:36.263 INFO UPLOAD_PROGRESS Uploaded chunk 301218 size 4170093, 35.97MB/s 1 day 07:37:24 25.1%
2017-05-16 18:57:37.031 INFO UPLOAD_PROGRESS Uploaded chunk 301219 size 11407268, 35.97MB/s 1 day 07:37:26 25.1%
2017-05-16 18:57:37.451 INFO UPLOAD_PROGRESS Uploaded chunk 301220 size 2712485, 35.97MB/s 1 day 07:37:26 25.1%
2017-05-16 18:57:37.934 INFO UPLOAD_PROGRESS Uploaded chunk 301221 size 4371216, 35.97MB/s 1 day 07:37:25 25.1%
2017-05-16 18:57:38.252 INFO UPLOAD_PROGRESS Uploaded chunk 301222 size 1677083, 35.97MB/s 1 day 07:37:28 25.1%
2017-05-16 18:57:39.348 INFO UPLOAD_PROGRESS Uploaded chunk 301223 size 16777216, 35.97MB/s 1 day 07:37:29 25.1%
2017-05-16 18:57:39.751 INFO UPLOAD_PROGRESS Uploaded chunk 301224 size 4283336, 35.97MB/s 1 day 07:37:29 25.1%
2017-05-16 18:57:40.228 INFO UPLOAD_PROGRESS Uploaded chunk 301225 size 7206354, 35.97MB/s 1 day 07:37:31 25.1%
2017-05-16 18:57:40.579 INFO UPLOAD_PROGRESS Uploaded chunk 301226 size 2676535, 35.97MB/s 1 day 07:37:31 25.1%
2017-05-16 18:57:40.933 INFO UPLOAD_PROGRESS Uploaded chunk 301227 size 2012126, 35.97MB/s 1 day 07:37:31 25.1%
2017-05-16 18:57:41.398 INFO UPLOAD_PROGRESS Uploaded chunk 301228 size 2848430, 35.96MB/s 1 day 07:37:33 25.1%
2017-05-16 18:57:41.729 INFO UPLOAD_PROGRESS Uploaded chunk 301229 size 1334207, 35.96MB/s 1 day 07:37:33 25.1%
2017-05-16 18:57:42.003 INFO UPLOAD_PROGRESS Uploaded chunk 301230 size 1925156, 35.96MB/s 1 day 07:37:36 25.1%
2017-05-16 18:57:43.156 INFO UPLOAD_PROGRESS Uploaded chunk 301231 size 11814879, 35.96MB/s 1 day 07:37:38 25.1%
2017-05-16 18:57:43.719 INFO UPLOAD_PROGRESS Uploaded chunk 301232 size 3451290, 35.96MB/s 1 day 07:37:37 25.1%
2017-05-16 18:57:44.477 INFO UPLOAD_PROGRESS Uploaded chunk 301233 size 9205176, 35.96MB/s 1 day 07:37:39 25.1%
2017-05-16 18:57:44.832 INFO UPLOAD_PROGRESS Uploaded chunk 301234 size 1699071, 35.96MB/s 1 day 07:37:39 25.1%
2017-05-16 18:57:45.168 INFO UPLOAD_PROGRESS Uploaded chunk 301235 size 1564499, 35.96MB/s 1 day 07:37:42 25.1%
2017-05-16 18:57:45.964 INFO UPLOAD_PROGRESS Uploaded chunk 301236 size 9931223, 35.96MB/s 1 day 07:37:41 25.1%
2017-05-16 18:57:46.275 INFO UPLOAD_PROGRESS Uploaded chunk 301237 size 1266517, 35.96MB/s 1 day 07:37:44 25.1%
2017-05-16 18:57:47.102 INFO UPLOAD_PROGRESS Uploaded chunk 301238 size 14956466, 35.96MB/s 1 day 07:37:45 25.1%
2017-05-16 18:57:47.524 INFO UPLOAD_PROGRESS Uploaded chunk 301239 size 5600455, 35.96MB/s 1 day 07:37:44 25.1%
2017-05-16 18:57:48.651 INFO UPLOAD_PROGRESS Uploaded chunk 301240 size 16777216, 35.96MB/s 1 day 07:37:46 25.1%
2017-05-16 18:57:49.250 INFO UPLOAD_PROGRESS Uploaded chunk 301241 size 8099832, 35.96MB/s 1 day 07:37:48 25.1%
2017-05-16 18:57:49.556 INFO UPLOAD_PROGRESS Uploaded chunk 301242 size 1375306, 35.96MB/s 1 day 07:37:48 25.1%
2017-05-16 18:57:49.895 INFO UPLOAD_PROGRESS Uploaded chunk 301243 size 2291442, 35.96MB/s 1 day 07:37:47 25.1%
2017-05-16 18:57:50.226 INFO UPLOAD_PROGRESS Uploaded chunk 301244 size 2074003, 35.96MB/s 1 day 07:37:50 25.1%
2017-05-16 18:57:50.699 INFO UPLOAD_PROGRESS Uploaded chunk 301245 size 6310147, 35.96MB/s 1 day 07:37:49 25.1%
2017-05-16 18:57:51.128 INFO UPLOAD_PROGRESS Uploaded chunk 301246 size 6102071, 35.96MB/s 1 day 07:37:52 25.1%
2017-05-16 18:57:51.545 INFO UPLOAD_PROGRESS Uploaded chunk 301247 size 3112765, 35.96MB/s 1 day 07:37:52 25.1%
2017-05-16 18:57:51.860 INFO UPLOAD_PROGRESS Uploaded chunk 301248 size 2296881, 35.96MB/s 1 day 07:37:51 25.1%
2017-05-16 18:57:52.269 INFO UPLOAD_PROGRESS Uploaded chunk 301249 size 2276301, 35.96MB/s 1 day 07:37:54 25.1%
2017-05-16 18:57:52.693 INFO UPLOAD_PROGRESS Uploaded chunk 301250 size 5147593, 35.96MB/s 1 day 07:37:53 25.1%
2017-05-16 18:57:53.049 INFO UPLOAD_PROGRESS Uploaded chunk 301251 size 3391892, 35.96MB/s 1 day 07:37:56 25.1%
2017-05-16 18:57:53.919 INFO UPLOAD_PROGRESS Uploaded chunk 301252 size 14985564, 35.96MB/s 1 day 07:37:54 25.1%
2017-05-16 18:57:54.371 INFO UPLOAD_PROGRESS Uploaded chunk 301253 size 3663569, 35.96MB/s 1 day 07:37:57 25.1%
2017-05-16 18:57:54.660 INFO UPLOAD_PROGRESS Uploaded chunk 301254 size 1231399, 35.96MB/s 1 day 07:37:57 25.1%
2017-05-16 18:57:55.354 INFO UPLOAD_PROGRESS Uploaded chunk 301255 size 8671454, 35.96MB/s 1 day 07:37:59 25.1%
2017-05-16 18:57:55.700 INFO UPLOAD_PROGRESS Uploaded chunk 301256 size 2874809, 35.96MB/s 1 day 07:37:59 25.1%
2017-05-16 18:57:56.028 INFO UPLOAD_PROGRESS Uploaded chunk 301257 size 1678656, 35.95MB/s 1 day 07:38:02 25.1%
2017-05-16 18:57:56.620 INFO UPLOAD_PROGRESS Uploaded chunk 301258 size 6741827, 35.95MB/s 1 day 07:38:01 25.1%
2017-05-16 18:57:56.917 INFO UPLOAD_PROGRESS Uploaded chunk 301259 size 2216930, 35.95MB/s 1 day 07:38:01 25.1%
2017-05-16 18:57:57.072 ERROR UPLOAD_CHUNK Failed to upload the chunk 3c8bc56bb9bbd558583dc50ff822647beb27107e1e261310ee08d1faec545ea3: googleapi: Error 503: Backend Error, backendError


Charles    May 17 8:29AM 2017

Ran for about 10 hrs before getting this error (see log above). First uploaded chunk was about 5 hrs before the error, the rest was all skipped.

2017-05-16 13:58:40.095 INFO UPLOAD_PROGRESS Skipped chunk 268774 size 6890693, 59.92MB/s 19:43:18 22.2%
2017-05-16 13:58:40.180 INFO UPLOAD_PROGRESS Skipped chunk 268775 size 4136196, 59.92MB/s 19:43:18 22.2%
2017-05-16 13:58:40.231 INFO UPLOAD_PROGRESS Skipped chunk 268776 size 4459409, 59.92MB/s 19:43:18 22.2%
2017-05-16 13:58:40.432 INFO UPLOAD_PROGRESS Skipped chunk 268777 size 11993642, 59.92MB/s 19:43:17 22.2%
2017-05-16 13:58:40.582 INFO UPLOAD_PROGRESS Skipped chunk 268778 size 9719979, 59.92MB/s 19:43:16 22.2%
2017-05-16 13:58:40.679 INFO UPLOAD_PROGRESS Skipped chunk 268779 size 6204391, 59.92MB/s 19:43:16 22.2%
2017-05-16 13:58:40.731 INFO UPLOAD_PROGRESS Skipped chunk 268780 size 3143608, 59.92MB/s 19:43:16 22.2%
2017-05-16 13:58:40.805 INFO UPLOAD_PROGRESS Skipped chunk 268781 size 5303558, 59.92MB/s 19:43:15 22.2%
2017-05-16 13:58:40.849 INFO UPLOAD_PROGRESS Skipped chunk 268782 size 2129622, 59.92MB/s 19:43:15 22.2%
2017-05-16 13:58:40.891 INFO UPLOAD_PROGRESS Skipped chunk 268783 size 3417456, 59.92MB/s 19:43:15 22.2%
2017-05-16 13:58:40.950 INFO UPLOAD_PROGRESS Skipped chunk 268784 size 7167851, 59.92MB/s 19:43:14 22.2%
2017-05-16 13:58:41.026 INFO UPLOAD_PROGRESS Skipped chunk 268785 size 5628600, 59.92MB/s 19:43:17 22.2%
2017-05-16 13:58:41.152 INFO UPLOAD_PROGRESS Skipped chunk 268786 size 9803939, 59.92MB/s 19:43:17 22.2%
2017-05-16 13:58:41.197 INFO UPLOAD_PROGRESS Skipped chunk 268787 size 1859756, 59.92MB/s 19:43:17 22.2%
2017-05-16 13:58:41.247 INFO UPLOAD_PROGRESS Skipped chunk 268788 size 4054580, 59.92MB/s 19:43:16 22.2%
2017-05-16 13:58:41.356 INFO UPLOAD_PROGRESS Skipped chunk 268789 size 10461919, 59.92MB/s 19:43:16 22.2%
2017-05-16 13:58:41.610 INFO UPLOAD_PROGRESS Skipped chunk 268790 size 9315676, 59.92MB/s 19:43:15 22.2%
2017-05-16 13:58:41.703 INFO UPLOAD_PROGRESS Skipped chunk 268791 size 7178719, 59.92MB/s 19:43:14 22.2%
2017-05-16 13:58:41.750 INFO UPLOAD_PROGRESS Skipped chunk 268792 size 2199389, 59.92MB/s 19:43:14 22.2%
2017-05-16 13:58:41.803 INFO UPLOAD_PROGRESS Skipped chunk 268793 size 2164017, 59.92MB/s 19:43:14 22.2%
2017-05-16 13:58:41.847 INFO UPLOAD_PROGRESS Skipped chunk 268794 size 5326768, 59.92MB/s 19:43:14 22.2%
2017-05-16 13:58:42.405 INFO UPLOAD_PROGRESS Uploaded chunk 268795 size 3133691, 59.92MB/s 19:43:17 22.2%
2017-05-16 13:58:42.980 INFO UPLOAD_PROGRESS Uploaded chunk 268796 size 6482551, 59.92MB/s 19:43:16 22.2%
2017-05-16 13:58:43.388 INFO UPLOAD_PROGRESS Uploaded chunk 268797 size 2773082, 59.92MB/s 19:43:20 22.2%
2017-05-16 13:58:43.751 INFO UPLOAD_PROGRESS Uploaded chunk 268798 size 1462498, 59.92MB/s 19:43:20 22.2%
2017-05-16 13:58:44.112 INFO UPLOAD_PROGRESS Uploaded chunk 268799 size 1810903, 59.92MB/s 19:43:23 22.2%
2017-05-16 13:58:44.627 INFO UPLOAD_PROGRESS Uploaded chunk 268800 size 3987189, 59.92MB/s 19:43:23 22.2%
2017-05-16 13:58:45.239 INFO UPLOAD_PROGRESS Uploaded chunk 268801 size 5770960, 59.91MB/s 19:43:26 22.2%
2017-05-16 13:58:45.729 INFO UPLOAD_PROGRESS Uploaded chunk 268802 size 3485746, 59.91MB/s 19:43:26 22.2%


gchen    May 17 9:16PM 2017

Although the official GCS client library claims that a retry mechanism is in place for all methods, after some code digging I came to the conclusion that at least the upload method doesn't support it because of the way the code is written.

I'll add a retry logic to the outer layer in the GCS storage backend. Should be done by the end of tomorrow.


Charles    May 18 9:19AM 2017

I thought it was weird when I received the message because I had also read in like one of the first paragraphs of their documentation that all of their requests implement an infinite retry. Thanks for looking into it.


Charles    May 18 10:27AM 2017

On another note.. Unfortunately it's hard to get a grasp on how fast this application is and how long it has left since I have not gotten it to complete on my larger data set yet.

I did a basic verify and it thinks that I have 200 GB uploaded while GCP reports 1.21 TiB which I'm guessing is because each time it fails and restarts it removes the incomplete snapshot and starts over again, skipping existing chunks with the pre-upload check. This throws off the time estimate quite a bit. It also slows down a retry for such a large dataset quite a bit. I'm having to wait for a lot of skipped chunks before it starts uploading again.

From what I can tell from my smaller backup, it will not take as much time to check every single chunk. In fact, it doesn't seem to do that at all. Can you confirm this behavior? I'd hate to get all of this uploaded only to find out that each backup takes a couple of days.

Assuming that backups after the initial are faster, is it possible to support partial backups whether due to failure or OS restart or other reasons? I suppose the chunks that were still in progress would have to be re-checked/ uploaded in case they didn't finish, but it would make this type of situation much faster.

Lastly, with this much data, should I consider changing the chunk size? This may be subject to opinion and situation. I have a mix of many small files as well as some extra large files and every size in between (probably up to ~100 GB for 1 file). I don't mind starting the upload over if it would be better. I was thinking about doing that anyway to get an idea of how fast the backup is.


gchen    May 18 8:55PM 2017

If the previous backup successfully finished, Duplicacy will just check the timestamp and size of each file to see if any of them changed from the last backup. It will then run the chunking algorithm on changed files and upload chunks created from these files. This is the default behavior unless the -hash option is specified.

However, if previous backups all failed for some reason, Duplicacy will have to run the chunk algorithm on all files. This is unfortunate as you can see from your tests that a considerable amount of time is spent just to recreate all chunks and then find out they all had already been uploaded. The solution I have in mind is to save the incomplete snapshot locally, which stores the files that have been scanned and uploaded. And then when you specify a -resume option, it will load this incomplete snapshot and only work on files not included or different from those in that snapshot.


gchen    May 18 10:20PM 2017

I uploaded a new 2.0.0 build that implements the retry logic for uploading chunks. Please give it a try.


Charles    May 19 7:05AM 2017

It's running now. It will be about 5 hours again before it starts uploading I'm guessing.

One thing I noticed that is not really a big deal, but may be worth noting in the documentation/ guide what the limitations are (if any): I upped the thread count from 8 to 12 to try to get passed the skipped chunks part faster and it actually slowed down significantly. I went from 10-20 chunks per second to 1-10. Looking in the task manager, It seemed that only 1 core was being used at a time with 12 threads specified, but when I changed it back to 8, several are being used again. 12 is completely unnecessary and I don't think I want to use that much processing power anyway, but I thought I'd let you know what I observed.

Did you have any recommendation on chunk size? Should I leave it default? TBH, variable sized chunking is a bit hard to conceptualize how that even works in the deduplication processes.


Charles    May 19 7:11AM 2017

Maybe I should have just let it keep running at 12. 8 eventually did the same thing (slowed down and started using only about 20% of 1 core. It's probably just processing a larger file or something when it does that and only 1 thread can access it at a time so it sort of waits. So maybe there is no problem there.


gchen    May 19 9:51PM 2017

The -threads option only sets the number of uploading threads. There is only one chunking thread that splits files into chunks and then dispatches them to the uploading threads. Therefore, I doubt 8 or 12 uploading threads would make a big difference when all chunks have been uploaded before.

The number one reason to use a large chunk size is to reduce the overhead of uploading chunks. This is because Duplicacy performs 2 API calls for each new chunk, one for checking the existence and the other for actually uploading the chunk. So the larger the chunk, the more time will be spent on the uploading.

In your case you can use multiple threads to take advantage of your fast uplink so I don't think you need to increase the chunk size. On the other hand, if you have many files smaller than the default chunk size that may change frequently, you may consider decreasing the chunk size instead. Duplicacy may pack multiple small files into a single chunk (think of this as if it were packing all files, large or small, into a huge tar file and then running the variable-size chunking algorithm on the tar file), so these small files will not see the benefit of deduplication between changes.


Charles    May 21 3:48PM 2017

That makes sense. Thanks for the explanation. Without consistent data sizes and uses I guess I'm kind of in limbo. I'll just stick with the default for now. If I'm able to achieve a good amount of deduplication, then it'll be worth it. If not, I may switch it to a higher chunk size and re-upload after some testing while I still have some GCP trial credit. I may create 64 GB of data in one sitting and the faster that gets backed up the better. We'll see.

It seems to be working now. It says it has been running since Friday and still has a day and a half left (Sunday now) with 8 threads on a Gigabit connection. Not the fastest backup I've tried, but very possibly the fastest I've tried at this deduplication level. We will see when it finishes.

2017-05-21 16:44:00.530 INFO UPLOAD_PROGRESS Skipped chunk 714171 size 16777216, 17.23MB/s 1 day 12:48:47 58.2%


Charles    May 22 10:18AM 2017

Another thought occurs to me and perhaps you can provide some insight. Since we know the program is working now, how much of a speed increase do you think we would see if I turned off the detailed logging?

Even though I am using multiple threads, there has to be some point in the application where a context switch takes place to write to the log file (edit: to the screen which I am piping to a log file). There are a number of techniques that could be used to speed this process along but from my own experience, something like that would be implemented further along in the incremental development process.

Do you have any thoughts or experience on how this would affect backup speeds for the current iteration?

PS Thank you for your excellent level of support and putting up with my constant curiosities about the inner workings and my abrasive opinions and questions. Obviously my interest in the program you have built goes beyond getting my data backed up. I can't wait to get my hands on the source code.

2017-05-22 10:43:54.064 INFO UPLOAD_PROGRESS Uploaded chunk 846122 size 2431489, 15.30MB/s 1 day 05:58:09 69.8%
2017-05-22 10:43:54.555 INFO UPLOAD_PROGRESS Uploaded chunk 846123 size 4517584, 15.30MB/s 1 day 05:58:09 69.8%
2017-05-22 10:43:55.305 INFO UPLOAD_PROGRESS Uploaded chunk 846124 size 5912045, 15.30MB/s 1 day 05:58:08 69.8%
2017-05-22 10:43:55.892 INFO UPLOAD_PROGRESS Uploaded chunk 846125 size 2124090, 15.30MB/s 1 day 05:58:08 69.8%
2017-05-22 10:43:56.322 INFO UPLOAD_PROGRESS Uploaded chunk 846126 size 1430229, 15.30MB/s 1 day 05:58:09 69.8%
2017-05-22 10:43:56.764 INFO UPLOAD_PROGRESS Uploaded chunk 846127 size 5855485, 15.30MB/s 1 day 05:58:08 69.8%
2017-05-22 10:43:57.201 INFO UPLOAD_PROGRESS Uploaded chunk 846128 size 1945520, 15.30MB/s 1 day 05:58:08 69.8%
2017-05-22 10:43:57.678 INFO UPLOAD_PROGRESS Uploaded chunk 846129 size 4581043, 15.30MB/s 1 day 05:58:08 69.8%
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2017-05-22 10:43:58.406 INFO UPLOAD_PROGRESS Uploaded chunk 846131 size 2172488, 15.30MB/s 1 day 05:58:08 69.8%
2017-05-22 10:43:58.806 INFO UPLOAD_PROGRESS Uploaded chunk 846132 size 2962683, 15.30MB/s 1 day 05:58:07 69.8%
2017-05-22 10:43:59.287 INFO UPLOAD_PROGRESS Uploaded chunk 846133 size 4371412, 15.30MB/s 1 day 05:58:07 69.8%
2017-05-22 10:43:59.678 INFO UPLOAD_PROGRESS Uploaded chunk 846134 size 4819426, 15.30MB/s 1 day 05:58:07 69.8%
2017-05-22 10:44:00.157 INFO UPLOAD_PROGRESS Uploaded chunk 846135 size 5437442, 15.30MB/s 1 day 05:58:07 69.8%
2017-05-22 10:44:01.048 INFO UPLOAD_PROGRESS Uploaded chunk 846136 size 13229446, 15.30MB/s 1 day 05:58:06 69.8%
2017-05-22 10:44:01.449 INFO UPLOAD_PROGRESS Uploaded chunk 846137 size 4054628, 15.30MB/s 1 day 05:58:06 69.8%
2017-05-22 10:44:01.900 INFO UPLOAD_PROGRESS Uploaded chunk 846138 size 1072854, 15.30MB/s 1 day 05:58:06 69.8%
2017-05-22 10:44:02.522 INFO UPLOAD_PROGRESS Uploaded chunk 846139 size 7562051, 15.30MB/s 1 day 05:58:05 69.8%
2017-05-22 10:44:02.994 INFO UPLOAD_PROGRESS Uploaded chunk 846140 size 2883132, 15.30MB/s 1 day 05:58:05 69.8%
2017-05-22 10:44:03.398 INFO UPLOAD_PROGRESS Uploaded chunk 846141 size 3689545, 15.30MB/s 1 day 05:58:05 69.8%
2017-05-22 10:44:03.753 INFO UPLOAD_PROGRESS Uploaded chunk 846142 size 1576206, 15.30MB/s 1 day 05:58:05 69.8%
2017-05-22 10:44:04.233 INFO UPLOAD_PROGRESS Uploaded chunk 846143 size 3350373, 15.30MB/s 1 day 05:58:05 69.8%
2017-05-22 10:44:04.584 INFO UPLOAD_PROGRESS Uploaded chunk 846144 size 2011109, 15.30MB/s 1 day 05:58:05 69.8%
2017-05-22 10:44:04.928 INFO UPLOAD_PROGRESS Uploaded chunk 846145 size 2492654, 15.30MB/s 1 day 05:58:05 69.8%
2017-05-22 10:44:05.260 INFO UPLOAD_PROGRESS Uploaded chunk 846146 size 1675592, 15.30MB/s 1 day 05:58:05 69.8%


gchen    May 22 12:32PM 2017

I don't think detailed logging would slow down the backup to the degree that it becomes noticeable, although there is no data to back this claim.

The upload speed is a bit slow for a 1 Gbps uplink. I'll add performance profiling to my to do list.


gchen    May 22 9:50PM 2017

The source code is now available from the github repository


Charles    May 23 3:29PM 2017

Oh how exciting. I'll have to wait to look at that until this weekend most likely.

FACEPALM But it's so close.....

2017-05-23 11:59:28.582 INFO UPLOAD_PROGRESS Uploaded chunk 1112591 size 10407000, 14.82MB/s 07:56:32 92.2%
2017-05-23 11:59:29.279 INFO UPLOAD_PROGRESS Uploaded chunk 1112592 size 5680803, 14.82MB/s 07:56:32 92.2%
2017-05-23 11:59:29.579 INFO UPLOAD_PROGRESS Uploaded chunk 1112593 size 3775219, 14.82MB/s 07:56:32 92.2%
2017-05-23 11:59:29.907 INFO UPLOAD_PROGRESS Uploaded chunk 1112594 size 3586406, 14.82MB/s 07:56:32 92.2%
2017-05-23 11:59:30.399 INFO UPLOAD_PROGRESS Uploaded chunk 1112595 size 10377805, 14.82MB/s 07:56:31 92.2%
2017-05-23 11:59:30.529 ERROR CHUNK_MAKER Failed to read 0 bytes: read E:\/.duplicacy\shadow\\/Shares/Access/VirtualMachines/MINTMINE/MINTMINE-Snapshot1.vmem: The device is not ready.
2017-05-23 11:59:30.669 INFO UPLOAD_PROGRESS Uploaded chunk 1112596 size 1966714, 14.82MB/s 07:56:31 92.2%
2017-05-23 12:01:01.273 INFO VSS_DELETE The shadow copy has been successfully deleted


gchen    May 24 7:16AM 2017

There is probably no need to backup the .vmem file. I'm not sure if that was a VSS issue (i.e., the VM hypervisor didn't implement the VSS writer correctly) or if that kind of file was not supposed to be readable even with VSS enabled. In any case, you can add an exclude pattern -*.vmem to .duplicacy/filters and try again.


Charles    May 24 7:48AM 2017

I suppose this will work as a temporary solution. None of my other backup solutions have had a problem with this though. I don't know how they handle it.


gchen    May 24 10:22AM 2017

Is that a VMware workstation file? I'll try it myself.


Charles    May 24 2:53PM 2017

It is. Based on the file name it's from where I took a snapshot of it. vmem is probably the snapshot of the ram since the machine was running.


Charles    May 25 3:47PM 2017

How deflating

2017-05-25 15:37:28.912 INFO UPLOAD_PROGRESS Uploaded chunk 1056557 size 11039277, 51.90MB/s 01:18:36 95.2%
2017-05-25 15:37:29.321 INFO UPLOAD_PROGRESS Uploaded chunk 1056558 size 2101654, 51.90MB/s 01:18:36 95.2%
2017-05-25 15:37:30.374 INFO UPLOAD_PROGRESS Uploaded chunk 1056559 size 10895912, 51.90MB/s 01:18:36 95.2%
2017-05-25 15:37:30.793 INFO UPLOAD_PROGRESS Uploaded chunk 1056560 size 4828920, 51.90MB/s 01:18:36 95.2%
2017-05-25 15:37:31.161 INFO UPLOAD_PROGRESS Uploaded chunk 1056561 size 2174038, 51.90MB/s 01:18:36 95.2%
2017-05-25 15:37:31.553 INFO UPLOAD_PROGRESS Uploaded chunk 1056562 size 3060655, 51.90MB/s 01:18:36 95.2%
2017-05-25 15:37:34.836 ERROR UPLOAD_CHUNK Failed to find the path for the chunk d470effc0ed2eacb3f904e8dfa3ee3baddf93681dc2c5e25f5f2cf4fbe89dc4b: Get https://www.googleapis.com/storage/v1/b/[redacted]/o/[redacted]%2Fchunks%2Fd470effc0ed2eacb3f904e8dfa3ee3baddf93681dc2c5e25f5f2cf4fbe89dc4b?alt=json&projection=full: unexpected EOF


gchen    May 25 10:30PM 2017

So this unexpected EOF needs to be caught and retried. This is likely a temporary error and may not happen if you run the backup again. However, I think it is really annoying that the backup has to start from the beginning even though it is faster than the actual uploading with all those skipped chunks. So the next major task for me is to implement fast resume. My plan is that it should be done by the end of next week.

I would also suggest that you create a separate repository for your virtual machines that backs up to a different storage location. For the storage you can set all three chunk size parameters to the same value. This will enable the fixed-size chunking algorithm which should be much faster than the variable-size chunking algorithm. We have a backup tool called Vertical Backup that does exactly that for VMWare ESXi.


Charles    May 26 7:10AM 2017

Agreed. It went for 18 hours only to have a temporary internet outage so I had to start it again. Then it took over 24 hours just to run into this error at 95%. My server has been threatening me that it is going to restart for updates too... which I keep cancelling via command line.

I can create a separate backup set for my vm's, but they don't really change often. These are mostly backups of vm's that I no longer use from an old version of vmware workstation that I got when I was in college. I might pull one down and fire it up to rebuild a discontinued piece of software that I still use or something, but for the most part they won't change. Most are growing disks with linux on them, so they aren't too big. It may not be a bad idea to pull them out into a separate backup set, but I have a feeling that once the initial backup is complete, it won't really slow my backup too much even if I change one of them.. unless you know something I don't.

I still use vm's for dev envs if I start a home project, so I will surely use a separate backup set for any of those (none right now), so it's good to know to set them to a fixed size for speed. I don't know if I want to use a separate piece of software though. Sounds like too much overhead for home use. Plus I'm not using esxi.


Charles    May 28 11:30AM 2017

It finally finished. I started running it again. It looks like it is rechecking everything. Is this always going to be the case?

2017-05-27 22:34:49.190 INFO UPLOAD_PROGRESS Skipped chunk 298338 size 5996574, 70.00MB/s 15:12:37 26.1%
2017-05-27 22:34:49.245 INFO UPLOAD_PROGRESS Skipped chunk 298339 size 4719426, 70.00MB/s 15:12:37 26.1%
2017-05-27 22:34:49.267 INFO UPLOAD_PROGRESS Skipped chunk 298340 size 2166734, 70.00MB/s 15:12:37 26.1%
2017-05-27 22:34:49.293 INFO UPLOAD_PROGRESS Skipped chunk 298341 size 2612248, 70.00MB/s 15:12:37 26.1%
2017-05-27 22:34:49.360 INFO UPLOAD_PROGRESS Skipped chunk 298342 size 5740648, 70.00MB/s 15:12:37 26.1%
2017-05-27 22:34:49.425 INFO UPLOAD_PROGRESS Skipped chunk 298343 size 5551157, 70.00MB/s 15:12:36 26.1%
2017-05-27 22:34:49.467 INFO UPLOAD_PROGRESS Skipped chunk 298344 size 3867387, 70.00MB/s 15:12:36 26.1%
2017-05-27 22:34:49.479 INFO UPLOAD_PROGRESS Skipped chunk 298345 size 1379893, 70.00MB/s 15:12:36 26.1%
2017-05-27 22:34:49.551 INFO UPLOAD_PROGRESS Skipped chunk 298346 size 5980379, 70.00MB/s 15:12:36 26.1%
2017-05-27 22:34:49.577 INFO UPLOAD_PROGRESS Skipped chunk 298347 size 2464162, 70.00MB/s 15:12:36 26.1%
2017-05-27 22:34:49.656 INFO UPLOAD_PROGRESS Skipped chunk 298348 size 6188076, 70.00MB/s 15:12:35 26.1%
2017-05-27 22:34:49.673 INFO UPLOAD_PROGRESS Skipped chunk 298349 size 1274697, 70.00MB/s 15:12:35 26.1%
2017-05-27 22:34:49.698 INFO UPLOAD_PROGRESS Skipped chunk 298350 size 1805073, 70.00MB/s 15:12:35 26.1%
2017-05-27 22:34:49.766 INFO UPLOAD_PROGRESS Skipped chunk 298351 size 3877210, 70.00MB/s 15:12:35 26.1%


gchen    May 29 7:30PM 2017

By default the backup command should skip files having the same timestamp AND size as the previous version. Once the second backup finishes, you should be able to see which files have been uploaded again. If the timestamp or size didn't change but the file got uploaded again that it is a bug.


Charles    May 30 8:59AM 2017

It took 22 hours for the second run..

2017-05-28 15:45:24.351 INFO BACKUP_STATS All chunks: 1106654 total, 5071G bytes; 166 new, 873,922K bytes, 233,652K bytes uploaded
2017-05-28 15:45:24.351 INFO BACKUP_STATS Total running time: 22:42:22


gchen    May 30 9:34AM 2017

Are you using the -hash option? If so, Duplicacy will check every file regardless of their timestamps and sizes.


Charles    May 30 10:39AM 2017

Ah. I did have that option in there. I'm running it from a batch file and completely overlooked that. User error. Ha.

Much better. I guess all I have left to do is schedule the backups and figure out how I can get e-mail notification of failures. That and check out the source code at some point. Thanks for all of your help.

2017-05-30 11:08:19.635 INFO BACKUP_STATS All chunks: 1106718 total, 5071G bytes; 69 new, 369,819K bytes, 77,936K bytes uploaded
2017-05-30 11:08:19.635 INFO BACKUP_STATS Total running time: 00:09:28