Gerald,
Not the case with me, if you look at the host ras03, you see that the average speed is .92MB/s while other host are significantly faster. It is taking 40 hours to do 110GB, while other hosts are doing it in about an hour. I’m about to patch this box and reboot it, it’s been up for 200+ days and I haven’t had a good backup for over a week now. So any input will be helpful, again thanks in advance.
Host User #Full Full Age (days) Full Size (GB) Speed (MB/s) #Incr Incr Age (days) Last Backup (days) State Last attempt
ras01 7 3.6 106.97 36.06 6 0.6 0.6 idle idle
ras02 7 3.5 122.30 29.25 6 0.5 0.5 idle idle
ras03 7 9.4 112.47 0.92 7 3.0 3.0 backup in progress
ras04 8 0.5 105.04 40.48 6 1.5 0.5 idle idle
ras05 7 2.7 29.77 17.19 6 0.7 0.7 idle idle
ras06 7 4.7 38.23 14.11 6 0.7 0.7 idle idle
ras07 7 1.8 134.75 30.72 6 0.8 0.8 idle idle
ras08 7 1.7 98.78 24.94 6 0.6 0.6 idle idle
ras09 7 1.7 13.38 21.73 6 0.7 0.7 idle idle
ras10 7 1.5 162.20 36.92 6 0.5 0.5 idle idle
ras11 7 2.5 100.25 23.62 6 0.5 0.5 idle idle
ras12 7 1.7 92.03 36.86 6 0.7 0.7 idle idle
Cheers,
_______________________________________________
Dan Lavu
System Administrator - Emptoris, Inc.
www.emptoris.com Office: 703.995.6052 - Cell: 703.296.0645
-----Original Message-----
From: Gerald Brandt [mailto:gbr AT majentis DOT com]
Sent: Thursday, April 28, 2011 1:51 PM
To: General list for user discussion,questions and support
Subject: Re: [BackupPC-users] Slow Rsync Transfer?
----- Original Message -----
> Hi,
>
> I've been running BackupPC for a while now and I've been noticing an
> odd trend, I have 29 servers which are identical in hardware and very
> similar in configuration. 28 of these servers transfer at 30-40MB/s
> via Rsync, one host and the database servers transfer between
> 2-10MB/s, even when ran individually when no other hosts are being
> backed up.
>
> I've checked the IOwait on both the BackupPC server which is a 12
> disk raid 10, with 2TB of usable space, 15k RPM drives, it has 5% IO
> while the host has 0%.
>
> I've done simple sftp transfers and they transfer at 20-30MB/s with no
> issues.
>
> Here is a backuppc log on one of the problem hosts,
>
> Backup# Type Filled Level Start Date Duration/mins
> Age/days Server Backup Path
> 112 full yes 0 2/5 19:06 62.3
> 81.6 /backuppc/pc/ras03/112
> 140 full yes 0 3/5 22:00 55.8
> 53.5 /backuppc/pc/ras03/140
> 154 full yes 0 3/20 04:35 465.2
> 39.2 /backuppc/pc/ras03/154
> 161 full yes 0 3/27 21:42 142.3
> 31.5 /backuppc/pc/ras03/161
> 167 full yes 0 4/4 18:00 854.0
> 23.7 /backuppc/pc/ras03/167
> 173 full yes 0 4/11 18:00 1032.9
> 16.7 /backuppc/pc/ras03/173
> 174 incr no 1 4/12 18:00 152.2
> 15.7 /backuppc/pc/ras03/174
> 175 incr no 1 4/13 18:00 1019.5
> 14.7 /backuppc/pc/ras03/175
> 176 incr no 1 4/14 18:00 1594.4
> 13.7 /backuppc/pc/ras03/176
> 177 incr no 1 4/15 21:11 2094.5
> 12.6 /backuppc/pc/ras03/177
> 178 full yes 0 4/19 03:00 2037.8
> 9.3 /backuppc/pc/ras03/178
> 179 incr no 1 4/20 18:16 1147.2
> 7.7 /backuppc/pc/ras03/179
> 180 incr no 1 4/21 18:04 1840.7
> 6.7 /backuppc/pc/ras03/180
> 181 partial yes 0 4/25 12:32 2389.1
> 2.9 /backuppc/pc/ras03/181
>
> I've already modified the checksum but it had no impact,
> '--checksum-seed=32761'. How does backuppc calculate the duration and
> speed? I know my oracle hosts, I kick off the RMAN prior to pulling
> the backuppc, so that might explain the "slow transfer speeds" if it
> calculated size/time which is inclusive of the RMAN (Database Export)
> backup. This host (above) boggles me though, these are static files
> that are being transferred and all other 28 hosts transfer just fine.
>
> Thanks in advance for any input or troubleshooting steps.
>
My best speed on Windows and Linux servers via rsync is 21 MB/s, the average is closer to 6 MB/s.
Gerald
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