> I have over 200 users with about 20 TB's of data that we backup. And I have > a problem... > > THE PROBLEM > The concept of backup is starting to lose it's meaning with desktops > sporting 1.5 TB drives. How can we stay abreast (sp?) of backing up ever > increasing drive sizes in workstations? > > CENTRALIZED BACKUPS > a. Let's say six months from now, 50 workstations will have a 1 TB drive > each > b. and another 50 workstations with 500 GB drives, > c. and 50 with 250 GBs, > d. and the rest with 100 GB drives > > Quick math shows we need to backup 75%*(50 TB + 25 TB + 12.5 TB + 5TB) = 70 > TB. I can buy one 32 TB's RAID 5 array for about $12.7K not including any > head ends. So, let's say I get by with 2 arrays - that's about $400/TB. > Are all of these drives going to be 100% full?
> > COMPARE WITH DISTRIBUTED BACKUPS > That means we put the backup drive in each workstation and run a fd and sd > on the same machine: > What happens if the hard drive on a machine goes bad? > > a. For each of the 200 workstations, we use 1 TB backup drives - that's > about $110/TB. > > I lose RAID 5 protection and gain in at-least 4 areas - at a quarter of the > cost: > a. Avoid high-capacity RADI 5 drive corruption > b. All eggs are not in one array, disasters damage is isolated > c. the need for an off-site disaster recovery backup is reduced. Not > eliminated, but the risk is spread out over 200 sites. > d. I also gain in backup storage capacity. > > THE QUESTION > To implement local backups, can I have 1 dir controlling 200 sd's? - one for > each workstation as follows: > I have never tried 200 SDs but a dozen or so works just fine. John ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users