Timothy J Massey schrieb: > Ralf Gross <ralf-li...@ralfgross.de> wrote on 02/19/2010 10:42:35 AM: > > > bit off topic: > > Right now I'm looking for a cheap storage solution that is based > > on supermicro chassis with 36 drive bays (server) or 45 drive bays > > (expansion unit) in 4 HU. Frightening, that would be 810 TB in one > > Rack (36 + 45 HDDs x 5 x 2 TB, 40 HU) with 5 servers. Only problem is > > power, cooling and.... backup. > > That's why companies like EMC and NetApp get big money for selling you > nearly the *exact* same hardware: but with software and services designed > to handle things like...backup. > > With storage sets of that size, there's really very little you can do > outside of snapshots, volume management and lots and lots of disk (and > chassis and processor and power and ...) redundancy. Simply traversing a > file system of that size is going to take more time than you have for a > backup window. If you want anything approaching daily backups, you can't > do it at the filesystem level. :( > > And even for things like off-site backup, it's far easier to have a > smaller version of your big array off-site and sync a snapshot > periodically (taking advantage of the logging/COW filesystem of the array > system) than it is to try to traverse an entire 800TB filesystem (or > multiple filesystems that add up to 800TB).
Your are absolutely right. I hope we will realize part of the storage with eg. NetApp and only a small part with a cheap solution which doesn't need backup or only in a "best effort" way. The data is not changing much, most of the files just lie there and will not be read again. Ralf ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/