Check out the following iotop output. Note that there are 4 rdiff-backups going
at the same time, from the same source to the same destination. 3 of the
backups are going at 120-200 MB/s, but one of them is only going at 9 MB/s. We
have observed this behavior multiple times, and always with the same source
folder. The /zpool0/store51b/db_rsyncs/site816 folder is large compared to the
others (around 2TB), but the size of the folder should not impact the transfer
speed should it?
Total DISK READ : 1096.30 M/s | Total DISK WRITE : 458.39 M/s
Actual DISK READ: 157.71 M/s | Actual DISK WRITE: 20.10 M/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND
3289403 be/4 root 128.61 M/s 183.57 M/s 0.00 % 38.48 % python3.6 -s
/usr/bin/rdiff-backup --tempdir /zpool0/rdiff_tmpdir --~--force
/zpool0/store51b/db_rsyncs/site189 /remote_rdiffs.nfs/site189
3232252 be/4 root 163.58 M/s 41.02 M/s 0.00 % 18.51 % python3.6 -s
/usr/bin/rdiff-backup --tempdir /zpool0/rdiff_tmpdir --~--force
/zpool0/store51b/db_rsyncs/site186 /remote_rdiffs.nfs/site186
348290 be/4 root 9.04 M/s 3.67 M/s 0.00 % 1.47 % python3.6 -s
/usr/bin/rdiff-backup --tempdir /zpool0/rdiff_tmpdir --~--force
/zpool0/store51b/db_rsyncs/site816 /remote_rdiffs.nfs/site816
3056376 be/4 root 191.39 M/s 150.88 M/s 0.00 % 0.00 % python3.6 -s
/usr/bin/rdiff-backup --tempdir /zpool0/rdiff_tmpdir --~--force
/zpool0/store51b/db_rsyncs/site179 /remote_rdiffs.nfs/site179
-Eric
Disclaimer : This email and any files transmitted with it are confidential and
intended solely for intended recipients. If you are not the named addressee you
should not disseminate, distribute, copy or alter this email. Any views or
opinions presented in this email are solely those of the author and might not
represent those of Physician Select Management. Warning: Although Physician
Select Management has taken reasonable precautions to ensure no viruses are
present in this email, the company cannot accept responsibility for any loss or
damage arising from the use of this email or attachments.
