On Mon, 2010-05-17 at 15:08 -0400, Paul Mather wrote: > I am currently assembling a quote for an LTO-4 tape backup system. So far, I > am looking at using a 16-slot Quantum SuperLoader 3 with LTO-4HH drive as the > tape unit. Married to this will be a server to act as the backup server that > will drive the tape unit using Bacula to manage backups. The server will be > a quad core X3440 system with 4 GB of RAM and four 1 TB SATA 7200 rpm hard > drives in a case that has room for eight hot-swap drives. I plan on using > FreeBSD 8 on the system, using ZFS to raidz the drives together to provide > spool space for Bacula. I will be using an Areca ARC-1300-4X PCIe SAS card > to interface with the tape drive. > > My main question is this: is the Quantum SuperLoader 3 LTO-4 tape drive > supported by Bacula 5 on FreeBSD? In particular, is the autoloader fully > supported? The Bacula documentation indicates the SuperLoader works fully > under Bacula, though not explicitly whether under FreeBSD. > > The backup server will serve a GigE network cluster of perhaps a dozen > machines with over 6 TB of storage, most of which is on the cluster's NFS > server. Does anyone have good advice on sizing the spool/holding/disk pool > for a Bacula server? Is it imperative to have enough disk space to hold a > full backup (i.e., 6 TB in this case), or is it sufficient to have enough > space to maintain streaming to tape? (I don't have much experience of > Bacula, having used it only to back up to disk.) In other words, do I need > more 1 TB drives in my backup server? > > Finally, is 4 GB of RAM sufficient for good performance with ZFS? Will ZFS > on FreeBSD be able to maintain full streaming speeds to tape, given the > various reports of I/O stalls under ZFS reported recently?
ZFS loves ram. More ram = better performance. I'm not at all familiar with zfs performance on feebsd but zfs version 13 that's used on freebsd 8 is pretty old. ZFS is currently at version 22. I/O stalls? Is that a freebsd issue? ------------------------------------------------------------------------------ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
