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/
