Re: [Veritas-bu] cumulative incremental - best to use: when?
Some NetBackup admins that use diffInc will throw in a CumInc in the middle of the week.>>> "Ed Wilts" <[EMAIL PROTECTED]> 8/17/2006 7:43 AM >>> James C Siano wrote:> Would cum.incr. be more advantageous for certain situations.> > Or where> else would it be best used overall from those on the list using that> formula? CumInc is used when you want to minimize the tape mounts for a restore andalso to minimize the risk of data loss in case of a bad tape. Say your fullwas Sunday and it's now Thursday and you need to do a restore. WithDiffInc, you're mounting Sunday's tape, then the Monday, Tuesday, andWednesday tapes. If Monday was bad, you're dead in the water. With aCumInc policy, you'd restore from your Sunday and Wednesday tapes and bedone. .../EdEd Wiltsmailto:[EMAIL PROTECTED]Mounds View, MN 55112___Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.eduhttp://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] cumulative incremental - best to use: when?
James C Siano wrote: > Would cum.incr. be more advantageous for certain situations. > > Or where > else would it be best used overall from those on the list using that > formula? CumInc is used when you want to minimize the tape mounts for a restore and also to minimize the risk of data loss in case of a bad tape. Say your full was Sunday and it's now Thursday and you need to do a restore. With DiffInc, you're mounting Sunday's tape, then the Monday, Tuesday, and Wednesday tapes. If Monday was bad, you're dead in the water. With a CumInc policy, you'd restore from your Sunday and Wednesday tapes and be done. .../Ed Ed Wilts mailto:[EMAIL PROTECTED] Mounds View, MN 55112 ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
[Veritas-bu] cumulative incremental - best to use: when?
At one time I used cumulative inc. for just about everything; however, then the realization that is was eating up tape galore. Would cum.incr. be more advantageous for certain situations. I was thinking in one case a database system called DOORS. It generates thousands of small files changing each day. The system has no export capability in order to restore one big blob--at least in the world I support. If I had two restore a doors db, then I'd could theoretically have to pick and choose hundreds of files if not thousands to get things back. Would cum.incr. be the best approach that specific endeavor. Or where else would it be best used overall from those on the list using that formula? ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
