Thanks, but the parameters , as I said, are fixed. Mostly because of the Political/Financial layer.
On Mon, Feb 2, 2009 at 11:33 AM, Rodrick Brown <[email protected]> wrote: > Buy cheaper storage for backups. Look into using VTL's or disk based > backup systems. > You can get 20TB sata for < $2000 I don't see the problem with > handling large datasets these days. > > On Mon, Feb 2, 2009 at 11:27 AM, Elizabeth Schwartz > <[email protected]> wrote: >> Fixed-in-stone parameters: >> >> 1) We outsource backup to central IT. >> 2) We are charged by the gigabyte, per backup run >> 3) The backup provider uses Legato >> 4) We would like to minimize backup cost. >> 5) Our data tends to be large and "clumpy" - in some random 1-to-4-day >> period, someone will write 10 gigs of data which will then sit there >> for months unchanged. >> 6) The data is on a very very reliable SAN so full restores are >> unlikely . We are willing to risk slow restores >> 7) We do individual file restores occasionally. No more than once a month >> max. >> >> >> The current backup strategy, which we didn't design and *** initially >> were unable to negotiate changes in *** is to do a full every 59 days, >> then a weekly rotation of 7,6,4,5,3,2,1 (which is the same as doing >> 2,2,2,2,2,2,1 , I know). This strategy minimizes tapes needed to do a >> full restore, but for data like ours it tends to maximize *cost*. >> It's time to negotiate a change. >> >> The obvious thing would be to go to full every 59 days and a >> 1,2,3,4,5,6,7 rotation, but I'm thinking we should get a little >> creative. If we do a full on Sunday and someone dumps 10G on Monday, >> that 10G will get backed up eight times. I'm thinking the first week >> should start with a 1, second with a 2, third with a 3, etc ... >> (Legato has 9 levels, I believe...?) >> >> any thoughts, suggestions, clue bonks? >> >> >> >> >> -- >> Unix Systems Administrator >> Harvard Graduate School of Design >> _______________________________________________ >> Tech mailing list >> [email protected] >> http://lopsa.org/cgi-bin/mailman/listinfo/tech >> This list provided by the League of Professional System Administrators >> http://lopsa.org/ >> > > > > -- > [ Rodrick R. Brown ] > http://www.rodrickbrown.com http://www.linkedin.com/in/rodrickbrown > -- Unix Systems Administrator Harvard Graduate School of Design _______________________________________________ Tech mailing list [email protected] http://lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
