>> On Fri, 1 Sep 2006 13:17:17 +0200, "Loon, E.J. van - SPLXM" <[EMAIL >> PROTECTED]> said:
> We are about to implement a second (fallback) IT center on another > location. The idea is to create a hot standby environment for TSM. > We are already using a separate copypool which will be moved to the > new remote location, so if the primary pool gets lost, we have all > data (up until the last backup stgpool of course) on the remote > location. However, in case of a disaster, not only will we have to > be able to recover clients (from this copypool), but we also need to > continue backup here. > This would be no problem if one could promote a TSM copypool to a > primary pool. In this case one could just continue making (the forever > incremental) backups, but TSM doesn't offer this function (yet). Sure it does. In fact, you can do exactly as you describe; biggest impact will be that the copy stgpools are usually (very) poorly optimized for client restore. Think of it carefully: Two TSM servers: PRIM, and COPY; COPY is housing the offsites. You lose PRIM, but, since you're good at these things you have the database backed up offsite. You restore the PRIM database on hardware at the remote site. Immediately at that point, you have access to the data in the copy pools, and more importantly, you have the -database- that tells you what you have and don't have. The next incremental will only copy the data you didn't have as of the database backup which you used to do the restore. So, between the time you get PRIM restored at the remote site, and the time when the first of your clients have gotten their acts together, you can be RESTORE STGpool ing as fast as your little tape drives can scurry; as you make progress there (according to your previously determined list of priorities...) your replacement PRIM becomes better and better suited to serve the client restores. >From another perspective: Why "promote" a copystgpool to PRIMARY status? You'll just need to re-organize the new PRIMARY pool and then make a copy pool. Less work to take the well-organized (for a copy stgpool) existing copystgpool and make a new PRIMARY. - Allen S. Rout - There is no copy, there is no primary. There is only data.
