There ain't no magic bullet for that question. You have to factor in a bunch of things; - The size of the backup windows for the Oracle/Domino server - how much the Oracle/Domino/other server windows overlap. - The amount of Oracle/Domino data you need to backup in the windows. - amount of disk stgpool (can you backup the entire window) - number of available tape drives (how many can you spare at any given time) - type of disk (can it handle a full write load from Gigabit Ethernet) - if you are confident the Oracle/Domino servers can stream to the TSM server at the speed of the tape drives (15MBytes/sec)
Judging from the number of tape drives it would make sense to keep streaming the Oracle/Domino data directly to tape. This would avoid a potential bottleneck writing to the disk pool (unless you have very fast disk subsystem) and the 15MB/sec would allow most large database dumps in a few hours. I would look at keeping a separate Gigabit segment for the database servers. It won't take too many connections on the main pipe to take a big chunk of it, and if you stream to tape you want the LTO drive buffers to be well fed (a potential performance issue). Cheers, Suad -- On Tue, 2002-11-19 at 21:45, HEMPSTEAD, Tim wrote: > Hi, > > We are replacing our existing TSM server with a new one and I have a > question about storage pool configuration. > > Currently our TSM server is running on the same RS6000 as our main Oracle > databases using a STK L700 tape silo connected directly to the RS6000. The > TSM server also backs up another RS6000 running Oracle and a couple more > running Domino over a gigabit network. The Oracle data and Domino database > data from these servers goes straight to tape whilst file-level data and > Domino transaction log data go via a disk storage pool. > > We are now going to use a separate RS6000 server running TSM 5 with an IBM > 3584 silo with 8 LTO drives. This will be connected to the other servers > via the gigabit lan. > > Would it be better to keep some of the data going straight to tape or would > I be better to use an intervening disk storage pool for all of the data and > then use multiple LTO drives to migrate to tape? > > Thanks > > Tim > > -- > Tim Hempstead, [EMAIL PROTECTED] > Unix Technical Specialist > SchlumbergerSema > > > _________________________________________________________ > This email is confidential and intended solely for the use of the > individual to whom it is addressed. Any views or opinions presented are > solely those of the author and do not necessarily represent those of > SchlumbergerSema. > If you are not the intended recipient, be advised that you have received > this email in error and that any use, dissemination, forwarding, printing, > or copying of this email is strictly prohibited. > > If you have received this email in error please notify the > SchlumbergerSema Helpdesk by telephone on +44 (0) 121 627 5600. > _________________________________________________________
