Mr Taylor.
I used to get this question or something like it while we were
transitioning our TSM environment to an outside vendor who had no
experience with TSM.
We had been instructed to modify (shorten) retention policies (Management
Class/Copy Group).
We were also directed to delete/remove a number of clients; not just stop
backing up, but remove.
I warned them...boldly....once the data is gone, it's GONE.
Later the question came, repeatedly, "But don't you have a copy on tape,
offsite somewhere?"
"No...I DID tell you, here is an e-mail."
The copy pool data is a copy of the data in the primary pool. The Primary
pool is not defined as the media where the data is first recorded. It is
the first place from which the data would be restored.
The Copy Pool is a disaster recovery resource. It covers you in the event
of damaged media (corrupted filesystem, dropped tape, failed disk) or
damaged data center (fire, flood, Ravens fans). It is a copy of what
currently exists in your primary pool.
When something is deleted from the Primary pool, it deleted from the Copy
pool.
Disk can be your first tier
Tape can be your first tier. (Sometimes large files will go straight to
tape, bypassing disk, though you can address that.)
Tape can be your second tier...but still be primary pool media.
Are you familiar with how to use Copy Group features?
Active data is never automatically deleted.
Inactive data is retained according to the number of versions you
decide to keep and the length of time you choose to keep each version.
You can decide separately how long to keep the last
version of each piece of inactive data.
Still if you have both Primary and Copy pools, you will have two (or more)
"copies" of each object you have backed up.
George Huebschman (George H.)
(301) 699-4013
(301) 875-1227 (Cell)
From:
Richard Rhodes <rrhodes AT FIRSTENERGYCORP DOT COM>
To:
ADSM-L AT VM.MARIST DOT EDU
Date:
03/24/14 03:12 PM
Subject:
Re: [ADSM-L] File retention
Sent by:
"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> What I want to accomplish is I want to set the primary pool to keep10
> versions of files for 30 days, and 10 versions of inactive files also
for
> 30 days, and keep the last version for 30 days, but I want the copy pool
> to keep teh last version of an inactive file FOREVER.
I know of no way to accomplish this.
Policies are on files, not pools. The policy of a file will be in effect
whether it's the primary pool copy or one/several copy pool copies.
Also, if you did have a copy pool which had different policies than the
primary pool, you wouldn't have redundancy. If you lost a copy pool tape
you would loose files on that volume that you need to keep forever.
There would be no way to recover them.
This would also be a huge DR issue. For DR you need:
- A copy of all files at a offsite/safe location in case you have a
disaster at the main site.
- A copy of all files at the main site in case the DR site is lost.
Rick
-----------------------------------------
The information contained in this message is intended only for the
personal and confidential use of the recipient(s) named above. If
the reader of this message is not the intended recipient or an
agent responsible for delivering it to the intended recipient, you
are hereby notified that you have received this document in error
and that any review, dissemination, distribution, or copying of
this message is strictly prohibited. If you have received this
communication in error, please notify us immediately, and delete
the original message.
The contents of this email are the property of PNC. If it was not addressed to
you, you have no legal right to read it. If you think you received it in error,
please notify the sender. Do not forward or copy without permission of the
sender. This message may contain an advertisement of a product or service and
thus may constitute a commercial electronic mail message under US Law. The
postal address for PNC is 249 Fifth Avenue, Pittsburgh, PA 15222. If you do not
wish to receive any additional advertising or promotional messages from PNC at
this e-mail address, click here to unsubscribe.
https://pnc.p.delivery.net/m/u/pnc/uni/p.asp
By unsubscribing to this message, you will be unsubscribed from all advertising
or promotional messages from PNC. Removing your e-mail address from this
mailing list will not affect your subscription to alerts, e-newsletters or
account servicing e-mails.
|
