From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]On Behalf Of Cahill, Ricky > Doing restores from the collocated primay pools I'm getting 10gb an hour. > From a non collocated pool (offsite) I'm getting about 5-7gb an hour. > > Has anyone got any figures on restores using DLT7000's as we're going > through the process of doing DR and having to > restore 7 Netware servers with 1.4tb at the above speeds is going to be > painful. > > PS...ANy hints and tips on doing large restores and how to speed them up > greatly apreciated as well ;)
You're fighting an uphill battle on two different fronts. DLTs are relatively slow tapes in terms of throughput, and they are devilishly slow on mounts and dismounts. *AND* NetWare's TSA module (which waves the baton for backups and restores) has never been known for promoting fast backups or restores. (What level of NetWare and TSA/SMDR modules are you at?) Suggestions: 1. Don't collocate your offsite pools--just your primary pools. Collocated offsite pools don't buy you much, because your chances of needing them as small. 2. Upgrade to server version 5.1.1. This will allow you to run MOVE NODEDATA on your non-collocated pools prior to disaster testing. You can run it by client, or by client filespace. Version 5.1.1 will also allow for multithreaded restores. 3. Do the LTO upgrade. Greater capacity (fewer tapes in collocated storage pools), much faster mounts, and faster throughput are all benefits of such a move. 4. Use the DIRMC option. Sending directory structures to a disk-based pool makes restore somewhat faster. (How to do so is a lengthy discussion; Read The Fine Manual.) -- Mark Stapleton ([EMAIL PROTECTED]) Certified TSM consultant Certified AIX system engineer MCSE
