ADSM-L

Re: backup stgpool from one server to another?

2005-04-20 13:47:44
Subject: Re: backup stgpool from one server to another?
From: Mike <mikee AT MIKEE.ATH DOT CX>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 20 Apr 2005 12:47:12 -0500
On Wed, 20 Apr 2005, Prather, Wanda might have said:

> Yes, you can use one TSM server as an "electronic vault" for another TSM 
> server.
>
> Look in the Administrator's Guide under the topic "Using Virtual Volumes to 
> Store Data on Another Server".
>
> It may not be the best approach, however:
>
> *     The data is sent from the primary server to the secondary server via 
> TCP/IP.  How well it works for you will depend a lot on the available 
> throughput you have, and the amount of data involved.
>
> *     It may not work like you want:  Server-to-Server virtual volumes create 
> an "electronic vault", not a "standby server".  If your primary server goes 
> down (or burns up!), the data is safe on the "other" TSM server, but cannot 
> be restored directly from the other server.  You have to recreate your 
> pirmary TSM server image first.
>
> *     First let me say that I don't even know what "on demand" is, but I'm 
> not sure what you mean by "temporary stuff".  If you are talking about 
> backups, TSM doesn't really understand the notion of "temporary".  How will 
> you get those backups to expire off the "other" server?  Archives are a 
> better choice for something that is "temporary".
>
> *     "Virtual" volumes also have to be reclaimed, and that involves transfer 
> via TCP/IP again.
>
> *     Have you considered creating a second copy pool and just moving the 
> tapes of this "temporary" stuff to the other server's location?  It's usually 
> faster and easier to manage than virtual volumes, if you have a lot of data.
>
> *     I assume from your question that your TSM servers have separate 
> libraries.  I don't have enough information about your config to say for 
> sure, but if your library will support it, a better solution may be to use a 
> fibre connection to let your 2 TSM servers share one of the libraries, and 
> have your TSM "on demand" server write its copy pool into the other machine's 
> library.
>
> Hope that helps.
>
> Wanda Prather
> "* I/O, I/O, It's all about I/O *"  -(me)
>
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> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf 
> Of Mike
> Sent: Wednesday, April 20, 2005 11:25 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: backup stgpool from one server to another?
>
>
> We have two TSM servers with one that backs up all nodes
> on the network (Intel and AIX) and the other that backs
> up data specifically written to an OnDemand server (historical,
> legal stuff that is kept for 6+ years).
>
> Is it possible to cause the temporary stuff, the files
> sent to OnDemand today that are not yet off-site in
> 6 year storage, to the other general purpose TSM so the
> files do get preserved and off site in some way in case
> something drastic happens?
>
> Does this make sense?
>
> I'm not trying to change OnDemand, but rather temporarily
> send files from one TSM to the other.
>
> Mike
>

Thank you very much. Just what I was looking for.

Mike

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