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ogio71
1 Copper

TSM, DD replication and tape vaulting

Hi all,

I'm talking about a customer that use Tivoli TSM.

He wants to save data from every site to a local DD.

All local DDs have to replicate their data to a central DD.

After that he wants to have a central TSM that make a tape vaulting.

I don't know very well TSM but I think this is not a simple task with Tivoli.

There are someone that has already done a similar project?

Regards and thanks in advance

Ambrogio

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13 Replies
ble1
5 Iridium

Re: TSM, DD replication and tape vaulting

Tape vaulting would be done with external tape unit?  In such case, you would have share on each local DD which would get replicated to central one.  On central one export these to some system and do their backup using TSM.  It is a bit strange concept, but might be that customer wishes to keep it for longer period on tapes and does not use archiving tier on DD.

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Re: TSM, DD replication and tape vaulting

Hi Hrvoje,

thanks for your reply.

I'm not sure I undestrand your reply.

The customer has a lot of remote sites, and in each site there is a TSM infrastructure (with tape library).

To evolve the infrastructure, the customer chose 2 sites to make a pilot.

In that sites, we put a DD with VTL configured.

TSM backups to DD.

The 2 remote DD should replicate the virtual tape to a central site, in which we have another DD.

This should be enough for a DR, but the customer wants to vault the backups to tape. The vaulting should be in the central site, and not in the remote sites.

It seems not be possible with TSM, because the central TSM didn't know anything about the remote backups and the replica.

The question is: there is a chance to have something that every day, after the remote backups and after the replica, can read from the replicated data on central site and do a vaulting to tape?


Regards

Ambrogio

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ble1
5 Iridium

Re: TSM, DD replication and tape vaulting

Ok, that's different.  So, you use VTL on each local site, replicate this to central site and wish to protect this further at central site, right? This is not possible as replication happens outside knowledge of TSM.  What eventually could be done, but do not quote me on that as I do not have such setup so this is in realm of guess, is to have central TSM scan/import these tapes on central site, but it would mean you need to create lib per DD and have them as such managed on central site which is kind of messy.  I think that for proper answer you will need someone with specific knowledge of TSM&DD joined operations.

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Re: TSM, DD replication and tape vaulting

Well Hrvoje,

is the same that I think.

TSM on central site didn't know about Virtual Tapes written by remote site and replicated.

Now I learned (but I don't think it's really true) that TSM cannot scan/import tapes.

I will try to involve some specialists on IBM.

Regards

Ambrogio

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ble1
5 Iridium

Re: TSM, DD replication and tape vaulting

They can't?  Strange... imagine that you move from one server to another tapes.... there must be a way to import those tape (scan them back into application catalog).

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dynamox
6 Gallium

Re: TSM, DD replication and tape vaulting

we use TSM and DD. Yes you can import tapes into TSM but what good does it do if you don't have the actual application database.

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ble1
5 Iridium

Re: TSM, DD replication and tape vaulting

Doesn't import scan populate DB?  We are talking about scanning tapes so that application learns about content on tape.

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dynamox
6 Gallium

Re: TSM, DD replication and tape vaulting

TSM does not store any "index" information on the tape itself, everything is in the database, what files reside on what volume, retention ..etc.

ble1
5 Iridium

Re: TSM, DD replication and tape vaulting

Interesting... so in case that you have DC lost and all you have is tapes written by TSM, let's say without TSM catalog data, you build things from scratch, but tapes are useless as you can't scan those tapes and populate DB with data what's on it? I'm not trying to say you are wrong - I simply do not know if TSM does have this option or not, but all the other big players (where TSM is also one of them) certainly have that possibility so I'm a bit confused about that feature (or lack of it).

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