> On 11/04/10 10:08, Oliver Hoffmann wrote: > > Hi all, > > > > I'll do backups to disk on a raid6 (28 TB) which is attached via > > fibre channel. > > There will be 50 clients with data ranging from a few MB to 100 GB > > or more for a full backup, tiny files from mail servers as well as > > large database ones. > > Speed and reliability are both important (as always). > > > > The question now is simply what is the best setup? > > > > Should I do one big volume pool or better a few smaller ones? > > I think one big pool is easier to manage. > > I have a total of four pools: a Full pool on tape and a Full pool on > disk, both with one-year retention; a Differential pool on disk, with > two months retention (thus spanning across two monthly Full backups); > and an Incremental pool on disk with one week retention (sufficient to > span from one weeky differential backup to the next).
Ah, ok. I think I'll start simply with one pool and add more later on depending on my needs. > > What is the best size for the volumes? > > 100 GB seems to be reasonable. > > I do not limit my volume sizes. I manage their size using volume use > duration instead. Each days backups go into a single volume, whatever > size that volume needs to be, a few GB or several hundred. Interesting approach. > > Which file system to have the best transfer rates? xfs? ext4? > > xfs could be better here but I am not sure about it. > > > > I like ubuntu. 10.04.1 LTS or the newer 10.10? > > I tend to LTS. > > > > What do you think? > > If your backup server will be running Linux, then for the time being I > would suggest XFS. It is optimized for sustained streaming reads and > writes, with multimedia and video originally in mind, but just the > thing for Bacula volumes. You might want to consider btrfs when it > becomes production-ready, though. > > My backup server runs Solaris 10 x86, and backs up to ZFS. > I will use xfs. I read about optimisations concerning both raid and streaming. Looks like the fs of choice for bacula + raid. btrfs might be an option for the next backup server in a couple of years. I consider it as not production-ready yet. zfs is fine. I had an zfs-only FreeBSD system with attached usb-drives with raidz. But with a hardware raid it is quite obsolete. Cheers, Oliver ------------------------------------------------------------------------------ The Next 800 Companies to Lead America's Growth: New Video Whitepaper David G. Thomson, author of the best-selling book "Blueprint to a Billion" shares his insights and actions to help propel your business during the next growth cycle. Listen Now! http://p.sf.net/sfu/SAP-dev2dev _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
