Re: Please help me NOT migrate
2004-04-20 13:45:48
> All right.
>
> 1. The only way to move TSM data from one operating system platform to
> another is by using the export/import functions.
>
> 2. Exporting 24TB of data, even running a direct export from the old TSM
> server to an import on the new server will take days.
>
> 3. How to prove this? Perform a fairly simple test. Create a test TSM server
> on, say a Linux server. Attach enough disk to the Linux server to hold all
> data for one decent-sized (say, 20GB) TSM client. Run an export from the old
> server to the new server. Calculate the amount of data moved and the time it
> takes to perform the export. You're moving data from tape to disk; now figure
> (roughly) half again as much time will needed to move data from tape to tape.
Yes, this will be a good test on the test solaris server. I will have some
good numbers to show the boss.
>
> There. You have a base line that you can show to the pointy-haired bosses and
> say, "It's going to take us a *long* time to move all of this data."
>
> With a 3494, a viable alternative is to add a second TSM server and share the
> library. Start doing your new backups through the new server, and allow the
> data on the old server to slowly expire away. You will eventually *have* to
> do an export to move data (particularly archives), but if you allow six to
> nine months' worth of expiration on the old server, the export will be a lot
> less painful.
This is something I can look into. I can paritiion the 3494 so each server
has its own frame, tape drives, and tapes. But will the 3494 control manager
get confused when 2 TSM servers try to talk to it at the same time? Doesn't one
has to be the Library Manager while the other the 'slave'?
Eliza
>
> (This scenario's gonna go in the FAQ.)
>
> --
> Mark Stapleton
>
>
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- Re: Please help me NOT migrate, Stapleton, Mark
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