"James Bass" <[EMAIL PROTECTED]> wrote: > > On both are 3ware cards with disks that are allocated to the directory > that holds the backup file storage (/bacula-nn). [snip] > > Also, during the slowdown, mysqld is being hit extremely hard. > > Now, if I switch the order of the "Storage" lines in the "Pool" section, > and restart the director, bconsole becomes snappy again, and backups to > the pool go to backup2. Mysqld is not taxed at all after the order is > switched > > Does any one have any idea on this?
I have had Bacula 1.38.x (and 1.36.x) running on a server with a 3ware RAID controller for over a year now, and swear *at* the 3ware controller instead of swear by it like most other people. Don't know if the thing is a pile of toss, if there's driver problems, or if maybe the motherboard is incompatible with the 3ware card, but disk I/O actually seems to be faster through a USB2 disk drive on the same server than it is to SATA disks on the 3ware card! When I finally got around to hooking up a SCSI LTO tape drive to this server last month and found the tape to be faster as a backup media than the disks, I realized just how bad the disk throughput really was. It seems to me like the major problem is limited to huge sequential reads/writes like Bacula does to monster backup files, but that's besides the point. In any case, the description of your problem above sounds like disk throughput problems just like I'm seeing, and if you have 30+ second delays even trying to logon to the system at the console when things slow down then you are surely seeing the same problem. The MySQL problem is another symptom of a disk bottleneck, especially if that disk partition is also on the 3ware controller. If I'm correct in my diagnosis, the explanation for your increased performance after swapping the parameters in the config file is because you re-started the daemons...which stopped the file processing backlog and let the disks catch up. Having a second storage daemon and disk controller is probably a little bit of a plus to better disk throughput as well. Of course, I may be wrong, but my $0.02 is to start by checking the disk throughput on your "backup1" box before you dig any deeper into Bacula's configuration..... -Arthur ------------------------------------------------------------------------- Arthur Emerson III Email: [EMAIL PROTECTED] Network Administrator InterNIC: AE81 Mount Saint Mary College MaBell: (845) 561-0800 Ext. 3109 330 Powell Ave. Fax: (845) 562-6762 Newburgh, NY 12550 SneakerNet: Aquinas Hall Room 6 ------------------------------------------------------------------------- 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 _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
