Hi Bill! You are on right way.
Disk pool 1 has NextPool TapePool1, which allows 20 scratch volumes max, and is collocated. All 50 clienst from Diskpool1 have to fit on 20 volumes in TapePool1. You have to ensure the capacity of those 20 volumes is fairly larger than sum of all versions of files backed up for all 50 clients plus space for expired files on tapes with status either filling or full. So not to "mess", DiskPools 2 and 3 have to point to another TapePool2, which can be uncollocated, if you wish so. regards Juraj Salak -----Urspr�ngliche Nachricht----- Von: William Rosette [mailto:[EMAIL PROTECTED] Gesendet: Donnerstag, 06. M�rz 2003 20:57 An: [EMAIL PROTECTED] Betreff: Re: progressive backup vs. full + incremental Now back to my original question of: How do you get a disk pool to go to a certain amount of tapes without the other disk pools messing them up? Let me try and explain. I currently have my Maximum Scratch Volumes 1487 Allowed in my Copypool. Are you saying to change this amount to 20 and then let the 1 disk pool put 50 clients on the 20 tapes. I have 3 disk pools, what about the other 2 nocollocated pools, what do they use for scratch tapes? (messing up) Thank You, Bill Rosette Data Center/IS/Papa Johns International WWJD Chris Murphy <[EMAIL PROTECTED] To: [EMAIL PROTECTED] E.ID.US> cc: Sent by: "ADSM: Subject: Re: progressive backup vs. full + incremental Dist Stor Manager" <[EMAIL PROTECTED] .EDU> 03/06/2003 01:53 PM Please respond to "ADSM: Dist Stor Manager" >I do not understand how you can get 50 clients on 1 disk pool to go to 20 >tapes. Bill, If I am wrong, someone will surely correct me, but what I think happens is that when migrating the 50 clients from disk to tape, TSM will try to put each one on its own tape (as collocate says it should). So the first 20 clients each go to their own tape. Then, when client 21's turn comes around, TSM searches for a new scratch tape to hold this client. If one does not exist (because of MAX SCRATCH or simply out of scratch in the library) TSM will go back and re-use the least consumed tape in that pool for client 21 and migrates 21's data to that tape. Meaning that tape now holds 2 clients. Then for Client 22, the same thing happens: it searches for a scratch, when none are found, it finds the next least consumed tape in the storage pool and uses it. And so on... >I would think that 50 clients on 1 (collocated) disk pool will >take 50 tapes. The Disk pool would not be collocated (because it would normally be a random access pool, not sequential). But, in our example, the destination tape storage pool would be. Hope that helps a bit! Chris Murphy IT Network Analyst Idaho Dept. of Lands Office: (208) 334-0293 [EMAIL PROTECTED]
