Here is the iostat output, the server is doing two full backups at the
moment, along with a nightly. Server specs: P4 3.2Ghz, 512MB RAM, 300GB
SATA drive.
[EMAIL PROTECTED] ~]# iostat
Linux 2.6.9-42.0.10.ELsmp (backup2.fluidhosting.com) 03/28/2007
avg-cpu: %user %nice %sys %iowait %idle
2.98 0.00 0.76 50.02 46.24
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 69.48 798.71 428.68 1556126098 835203048
sda1 0.00 0.00 0.00 1556 200
sda2 0.17 2.68 0.57 5219723 1109536
sda3 0.00 0.00 0.00 1073 320
sda4 0.00 0.00 0.00 2 0
sda5 0.23 3.04 1.14 5914146 2215408
sda6 111.33 792.87 426.97 1544752254 831876168
On that server, we're seeing backup speeds as low as .11MB/s which are
backups of several thousand files. Some backups are over 1MB/s, but
those are servers with only 100ish files.
--John
Evren Yurtesen wrote:
> John T. Yocum wrote:
>> According to the 3ware CLI, the cache is enabled.
>
> I have the same problem with much slower speeds (since I dont use SATA
> or raid it makes things worse) My finding is that backuppc is doing a
> lot of work while checking the files. Can you check if you are seeing
> extreme disk activity in your backup servers at the backup time?
>
> Thanks,
> Evren
>
>> --John
>>
>> John Pettitt wrote:
>>> Have you checked that the 3ware actually has cache enabled - it has a
>>> habit of disabling it if the battery backup is bad or missing and it
>>> will make a *huge* difference ....
>>>
>>> John
>>>
>>> John T. Yocum 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
>>>>
>>>> -------------------------------------------------------------------------
>>>>
>>>> Take Surveys. Earn Cash. Influence the Future of IT
>>>> Join SourceForge.net's Techsay panel and you'll get the chance to
>>>> share your
>>>> opinions on IT & business topics through brief surveys-and earn cash
>>>> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
>>>>
>>>> _______________________________________________
>>>> BackupPC-users mailing list
>>>> [email protected]
>>>> https://lists.sourceforge.net/lists/listinfo/backuppc-users
>>>> http://backuppc.sourceforge.net/
>>>>
>>>>
>>
>>
>> -------------------------------------------------------------------------
>> Take Surveys. Earn Cash. Influence the Future of IT
>> Join SourceForge.net's Techsay panel and you'll get the chance to
>> share your
>> opinions on IT & business topics through brief surveys-and earn cash
>> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
>> _______________________________________________
>> BackupPC-users mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/backuppc-users
>> http://backuppc.sourceforge.net/
-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
BackupPC-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/backuppc-users
http://backuppc.sourceforge.net/
