I figured that --cheksum-seed option will help me, although I cant say yet if it is working or not, I guess it will take a while until checksum caches are written for all the files. Do you have this option enabled?
Thanks, Evren John T. Yocum wrote: > 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/
