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November 26th, 2012 04:00

Delete data

Hi All,

I'm a newbie to Networker and would like to know best practise to delete data from Data domain tapes. I've already cloned some data of a client on to physical tape media for longer retention, hence want to delete data from DD tapes.

All suggestions and advices are highly appreciated.

Current Networker Server:7.6.2\

Data Domain:DD670 as vtl

Tape library: ADIC i500

Regards,

Samir

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November 26th, 2012 04:00

If you moved data from VTL to PTL (DD to i500), simply relabel tapes which are in VTL.  On DD you will see now that df gives you some more data (estimate) to be freed up next time cleanup runs.

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November 26th, 2012 04:00

Hi Hrvoje,

But there are some other client savesets also on these DD tapes apart from the client data which is cloned.

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November 26th, 2012 05:00

Then you have a problem. In DD (before 5.2), each tape is file actually and its size depends on what you configured (unless default size is used).  DD recommends to have it 100GB (I used 160GB).  Now, if you moved small part from that tape then you have an issue as that tape is still there and chunk of data can't be freed - that's how tape works.  From that point of view, DD Boost device is better of course as individual removal of backup sets will free the space (well, make it eligible for cleaning at DD level).  What you can do now is either move remaining backup sets (eg. nsrstage - yes, you can use it with tapes too) or just do nothing.

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November 26th, 2012 20:00

Is there a way to expire this cloned saveset inorder to reclaim the space from DD?

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November 27th, 2012 06:00

Seems you don't want to relabel those tapes. So there is still valid data on it.
If you really want to use those tapes again, stage the valid savesets off to another medium so you can reuse the tape. Or you wait for the retention to expire and the tape will be recycled by networker.

Assuming the tape is full, as long as there are savesets on the tape within retention, the whole tape will not be reused.


If you want to expire savesets still in retention use nsrmm to change the retention date(s).

Check retention: nsrmm -p

Change retention: nsrmm -e

Change browsetime: nsrmm -w

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November 28th, 2012 01:00

Is there a way to clone data on particular volume or the only way is to clone the savesets on  that volume?

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November 28th, 2012 02:00

samir.shaik wrote:

Is there a way to clone data on particular volume or the only way is to clone the savesets on  that volume?

There is no difference.  If you select volume cloning option, it will just list savesets and do their cloning so in essence under the hood you end up with saveset cloning always.  One thing to keep in mind is that when you do volume cloning then only save sets that start on that volume or are complete on that volume are picked up.  If you have save set which had middle part there or end, that one is not picked up by default.

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November 28th, 2012 03:00

I normally find savsets for a particular client with date selections and clone this saveset. Is this a safe way incase restores are needed?

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November 28th, 2012 03:00

That's only possible through the CLI. Something like this: nsrclone -b 'clone pool' 'volume'

Don't forget that backups starting on this volumen and ending on another volume will also be cloned.

Nsrclone will only clone complete savesets, so any spanned savesets might need multiple volumes.

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November 28th, 2012 13:00

samir.shaik wrote:

I normally find savsets for a particular client with date selections and clone this saveset. Is this a safe way incase restores are needed?

Yes.

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