Evren Yurtesen wrote: > I know that the bottleneck is the disk. I am using a single ide disk to > take the backups, only 4 machines and 2 backups running at a time(if I > am not remembering wrong). > > I see that it is possible to use raid to solve this problem to some > extent but the real solution is to change backuppc in such way that it > wont use so much disk operations. >
The whole purpose of live backup media is to use the media. What you may be noticing is that perhaps your drive is mounted with access time being tracked. You should check that your fstab has "noatime" as a parameter for your mounted data volume. This probably cuts the seeks down by nearly half or more. And, you could consider buying a faster drive, or one with a larger buffer. Some IDE drives have pathetically small buffers and slow rotation rates. That makes for a greater need for seeking, and worse seek performance. Also, if your server is a single-proc, you'll probably want to reduce it to 1 simultaneous backup, not 2. Heck, if you are seeing bad thrashing on the disk, it would have better coherence if you stick to 1 anyway. Increase your memory and you may see less virtual memory swapping as well. It seems that your setup is very similar to mine, and I'm not seeing the kind of performance problems you're reporting. Full backup using rsyncd over a slow wifi link of about 65gb is only taking about 100 minutes. Incrementals are about 35 minutes. Using SMB on a different machine with about 30gb, it takes 300 minutes for a full, even over gigabit, but only a couple of minutes for an incremental (because it doesn't detect as many changes as rsync). So it varies dramatically with the protocol and hardware. JH ------------------------------------------------------------------------- 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 BackupPC-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
