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[Duplicity-talk] What is Duplicity doing during incremental backup?
From: |
Nicholas Sherlock |
Subject: |
[Duplicity-talk] What is Duplicity doing during incremental backup? |
Date: |
Wed, 22 Feb 2012 13:41:03 +0900 |
Hi everyone,
I'm trying to backup a copy of my database to RackSpace cloud file storage using duplicity 0.6.15. The initial full backup went fine:
Local and Remote metadata are synchronized, no sync needed.
Last full backup date: none
No signatures found, switching to full backup.
--------------[ Backup Statistics ]--------------
StartTime 1329829385.54 (Tue Feb 21 13:03:05 2012)
EndTime 1329851993.83 (Tue Feb 21 19:19:53 2012)
ElapsedTime 22608.29 (6 hours 16 minutes 48.29 seconds)
SourceFiles 797
SourceFileSize 96807374962 (90.2 GB)
NewFiles 797
NewFileSize 96807374962 (90.2 GB)
DeletedFiles 0
ChangedFiles 0
ChangedFileSize 0 (0 bytes)
ChangedDeltaSize 0 (0 bytes)
DeltaEntries 797
RawDeltaSize 96807325776 (90.2 GB)
TotalDestinationSizeChange 30583984834 (28.5 GB)
Errors 0
-------------------------------------------------
Now I'm trying to re-run duplicity in order to create an incremental backup:
duplicity --allow-source-mismatch --volsize 200 /db cf+http://${CLOUDFILES_CONTAINER}
Local and Remote metadata are synchronized, no sync needed.
Last full backup date: Tue Feb 21 13:03:05 2012
However, it has been running for a long time and doesn't seem to be doing very much. No new files from the incremental backup have appeared in Rackspace. iostat shows that nothing is happening on disk (nothing is being read from the source device, /dev/md127):
# iostat 60
Linux 3.0.0-14-virtual (domU-12-31-38-04-24-66) 02/22/2012 _i686_ (1 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
0.81 0.00 35.14 0.24 54.12 9.69
Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
md127 0.47 15.64 0.36 135998 3162
xvdf 0.10 3.90 0.09 33924 800
xvdg 0.11 3.90 0.09 33891 808
xvdh 0.16 3.96 0.09 34462 776
xvdi 0.11 3.90 0.09 33903 778
avg-cpu: %user %nice %system %iowait %steal %idle
0.00 0.00 39.89 0.00 60.11 0.00
Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
md127 0.00 0.00 0.00 0 0
xvdf 0.00 0.00 0.00 0 0
xvdg 0.00 0.00 0.00 0 0
xvdh 0.00 0.00 0.00 0 0
xvdi 0.00 0.00 0.00 0 0
But despite this, Duplicity seems to be very busy doing something, using 99.5% of the CPU and 86.7% of the memory, looks like it has been running for 2 hours now:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1129 root 20 0 1455m 1.4g 4716 R 99.5 86.7 126:05.34 duplicity
Is that normal? What the heck is it doing? Could I speed up this process by running it on a multi-core box?
Cheers,
Nicholas Sherlock
- [Duplicity-talk] What is Duplicity doing during incremental backup?,
Nicholas Sherlock <=
Re: [Duplicity-talk] What is Duplicity doing during incremental backup?, edgar . soldin, 2012/02/22