Hello, I use Bacula daily and faced no real issues for years.
I installed a new instance and am facing a strange issue. I installed a new bacula server under Debian Wheezy. I try and backup several virtual machines hosted on 2 proxmox servers. These proxmox servers use their local hard disks drive (software RAID 1) Most of these VM are quite small and performance is not an issue. For 2 of them, it's not the same deal. They have 200 GB data pieces to back up : - one mail server - one web server Example : 2013-12-08 17:39:51 bck-dir-01-dir JobId 80: Bacula bck-dir-01-dir 5.2.6 (21Feb12): Job: Backup_eagle-vmail_QG.2013-12-08_10.13.18_38 Backup Level: Full (upgraded from Incremental) Client: "eagle-fd" 5.0.1 (24Feb10) i486-pc-linux-gnu,ubuntu,10.04 FileSet: "VMail q-g" 2013-12-08 10:13:18 Pool: "File" (From Job resource) Catalog: "Catalog1" (From Client resource) Storage: "File" (From Job resource) Scheduled time: 08-déc.-2013 10:13:17 Start time: 08-déc.-2013 10:13:20 End time: 08-déc.-2013 17:39:50 Elapsed time: 7 hours 26 mins 30 secs Priority: 15 FD Files Written: 426,533 SD Files Written: 426,533 FD Bytes Written: 79,375,820,932 (79.37 GB) SD Bytes Written: 79,463,703,342 (79.46 GB) Rate: 2962.9 KB/s Software Compression: None VSS: no Encryption: no Accurate: yes All machines have their network link set up to 1Gb/s FD With SCP, I can send / receive files at 50-60MB/s. First I used one job. It was running at something around 3MB/s. I split this job into 5 pieces. The job you can see backs up all mailboxes beginning with Q, S, D, F, G. Each job runs at 3MB/s. So, with 5 jobs running at the same time, I can get 15 MB/s. The backup window has been reduced by 5 and is now acceptable. I disabled "Accurate=yes". no change in the job's duration. I enabled compression : no change in the job's duration. It's not bound by the CPU neither the network. (running more jobs just increases the throughput linearly) With 1 job running at a time, there is no iowait. With 3 jobs at the same time, I have less than 5% iowait What could I check to find where is the bottleneck ? Best regards. Jerome Blion. ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
