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/
