John Pettitt wrote: > Bruno Faria wrote: >> Hello to everyone, >> >> Lately for some reason, BackupPC has been running very slow on a >> server that we have configured to do backups. Just so that you guys >> can have an idea of how slow it really is going, it took BackupPC >> 10265.2 minutes to backup 1656103 files totaling to only 24 gigabytes >> worth of files. Obviously, I can't really wait a week for a 24 gigbyte >> backup to be done. Now here's what makes me think that this problem >> with BackupPC could be due to server hardware: I first started started >> doing backups for one pc at a time, and it took BackupPC 468.8 minutes >> to backup 2626069 files or 32 gigabyte worth of files for that same >> computer. But now I have about 45 computers added to BackupPC and >> sometimes BackupPC is backing up 30 of them or more at the same time, >> and that's when the server really goes slow. >> >> Here's the top command when the BackupPC server is going slow: >> top - 19:06:36 up 15 days, 6:11, 3 users, load average: 28.76, >> 39.03, 32.14 >> Tasks: 156 total, 1 running, 155 sleeping, 0 stopped, 0 zombie >> Cpu(s): 3.7% us, 2.2% sy, 0.0% ni, 7.7% id, 86.0% wa, 0.4% hi, >> 0.0% si >> Mem: 1033496k total, 1019896k used, 13600k free, 141720k buffers >> Swap: 5116692k total, 2538712k used, 2577980k free, 41932k cached > > Any time your load average is more than your # of CPU's your system is > contending for CPU. You are also using a lot of swap which makes me > think your box has gone into thrashing death spiral. Add ram, limit > the number of simultaneous backups (I found by trial and error that the > number of spindles in the backup array is a good starting point for how > many backups can be run at once). > > In the server I just upgraded (Code 2 quad 2ghz, 2GB, 1.5TB ufs on > RAID10 , FreeBSD 7.0) my backups run between 3.6 MB/sec for a remote > server (*) and 56 MB/sec for a volume full of digital media on a gig-e > connected mac pro. Having a multi core CPU make a big difference > (bigger than I expected). > > (*) rsync is a wonderful thing - six times the actual line speed. > > John >
Just out of curiosity: why not using using ZFS? Is it really to be considered experimental? ZFS could be a reason for me to switch to FreeBDS, I remember dan to be the expert on ZFS - any news? Bernhard ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
