This has been discussed before, several times. Most of the
recommendations say, in no particular order: * drop your compression
level, * don't use RAID5, * try using something other than rsync, *
reduce the number of simultaneous backups, * increase memory on the
server, etc...
For what it's worth, I have a small installation that runs a mix of
rsyncd and SMB. The mothership machine runs rsyncd over a half-speed
wifi hookup. My backup machine is only a PIII 450mhz with 128mb of
ram. Small. The network is low-end gigabit equipment, except for the
wifi link. If I had to guess, I think with rsyncd, the host probably
matters as much or more than the server. I did notice an improvement
when I went from a PentiumPro to a PIII, and fair jump in improvement
again by going to gigabit.
Hope that helps,
JH
Host User #Full Full Age (days) Full Size (GB) Speed (MB/s)
#Incr Incr Age (days) Last Backup (days) State Last attempt
dev1 <http://backup.flaredev.com/cgi-bin/BackupPC_Admin?host=dev1>
panther <mailto:panther> 4 2.6 21.59 1.23 8 0.6 0.6 idle idle
dev2 <http://backup.flaredev.com/cgi-bin/BackupPC_Admin?host=dev2>
panther <mailto:panther> 4 4.5 2.47 1.11 7 0.5 0.5 idle idle
mothership
<http://backup.flaredev.com/cgi-bin/BackupPC_Admin?host=mothership>
panther <mailto:panther> 4 0.3 64.68 10.33 6 1.3 0.3 idle idle
ringer <http://backup.flaredev.com/cgi-bin/BackupPC_Admin?host=ringer>
panther <mailto:panther> 4 2.5 1.65 0.18 8 0.5 0.5 idle idle
sol <http://backup.flaredev.com/cgi-bin/BackupPC_Admin?host=sol>
panther <mailto:panther> 4 3.8 39.06 6.80 6 0.8 0.8 idle idle
Jamie Lists wrote:
We're having pertty much the exact same problem with the exact same
setup. I can SCP files between servers at 9MB a sec. But the backup
runs less than 1MB/s
I'm not sure if i should renice the process to be more aggressive or what.
We have so much data and users aren't gone long enough for a full
backup to even complete.
I'm not sure if we should switch to tar instead of rsync or what.
Please any speed tips please please let us know. - jamie
On 3/22/07, John T. Yocum <[EMAIL PROTECTED]> wrote:
I'm seeing terrible backup performance on my backup servers, the speed
has slowly degraded over time. Although, I have never seen speeds higher
than 1MB/s. (We have it set to do no more than 2 backups at a time.)
Here is our setup:
Our network is all 100Mb between servers, and switches, and 1Gb between
switches. So, there is enough network capacity for decent performance.
The servers being backed up, all have either RAID1 or RAID5 arrays
consisting of 15K RPM SCSI drives. All RAID is done in hardware.
The backup servers are using 7200RPM SATA drives, connected to 3ware
8500 or 9000 series controllers. Two the backup servers are using RAID1,
and the other is using RAID5.
Our backup servers are running CentOS 4.4, with ext3fs for the backup
partition. I have noatime enabled, and data=writeback set to hopefully
improve performance.
On our backup servers, they are all showing a very high wait during
backups. Here's a screenshot from one of them
http://www.publicmx.com/fh/backup2.jpg. At the time it was doing two
backups, and a nightly.
Any advice on improving performance, would be much appreciated.
Thank you,
John
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