Re: changing stgpool to access=unavailable

[Grigori Solonovitch]

I am using similar design for our disaster site, but not on DataDomain.
Exactly the same procedure is used during each disaster site testing.
Some important comments:
1) NFS file systems have to be mounted as "soft" (not default "hard") to 
prevent any hanging operations. AIX gives error for soft mounted NFS file 
system. For hard mounted NFS file system I/O operation is hanging with very bad 
consequences for TSM Server;
2) setting status "unavailable" for remote copy pool stops all operations, but 
does not prevent read or right errors for volumes in unavailable FILE pool in 
case of scheduled copy or space reclamation;
3) involved volumes can be marked as "readonly" with following manual 
correction after completion testing or maintenance.
4) TSM Server is able to use NFS file systems mounted back after exercise 
without any problems, but see points 1-3.

Grigori G. Solonovitch
Senior Technical Architect  Ahli United Bank Kuwait  www.ahliunited.com.kw

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-Original Message-
From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of 
Richard Rhodes
Sent: 06 07 2012 8:07 PM
To: ADSM-L@VM.MARIST.EDU
Subject: [ADSM-L] changing stgpool to access=unavailable

On Monday evening I have the first occasion to perform some maintenance on one 
of our DataDomain systems.  Our DD's are all setup for NFS access, so they are 
using FILE device type pools.

The plan is to:

- stop all processes/sessions writing to the DD based FILE stgpools
- mark the stgpool access=unavailable
- umount the NFS filesystem
- perform the DD work
- mount the NFS filesystem
- mark stgpool access=readwrite

Question:  What happens when a pool is changed to "access=unavailable"?

With tape, I can mark drive offline and the current process will keep writing 
to it until it finishes.

Is the same true with access=unavailable for a FILE dev pool?
In other words, can I mark it unavailable FIRST, and then cancel any 
processes/sessions using it.  This would prevent the wack-a-mole of 
sessions/processes starting as I cancel others.

(note: disk pool will still be available during this work.  The disk pool has a 
max size threshold set to force big files directly onto the DD. )

Rick


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DR restore question

[Geoff Gill]

Hi Everyone,
 
I have a question about DR testing as it relates to only testing restores of a 
limited number of nodes. we are going to do a DR test wherin the TSM server and 
6 other nodes will be brought back up. The TSM server being my responsibility, 
the other nodes some other administrator.
 
My part also includes making sure tapes are available at the DR site for those 
nodes that are part of the test. My question is how to figure out what tapes 
need to be sent since we obviously don't want to send everything. 
 
Does anyone have a easy way to extract that kind of info?

 
Thank You
Geoff Gill

Sequential disk storage pool performance

[Thomas Denier]

We have two TSM 6.2.2.0 TSM servers in different locations running under
zSeries Linux. Both use sequential disk storage pools on IBM XIV disk to
store the primary copies of backup files. The databases and recovery logs
are also on XIV disk.

We are still in the process of migrating workload to the two sites. We
expect to end up a couple of hundred TSM client nodes at each site, with
something in the neighborhood of a terabyte per night of incoming backup
data at each site.

We will shortly be taking delivery of a Hitachi HUS150 disk array for each
location. The initial motivation for these was to provide significantly
cheaper storage for large image repositories. We are considering using
the new arrays for long term storage of TSM backups as well. Two
different approaches to this are under consideration. One approach is to
have incoming backups written to HUS150 disk and then left there. The
other approach is to have incoming backups written to XIV disk and
subsequently migrated to HUS150 disk for long term storage.

Has anyone tried the first approach with an HUS150 or a competing product
with similar performance characteristics?

Thomas Denier,
Thomas Jefferson University Hospital

changing stgpool to access=unavailable

[Richard Rhodes]

On Monday evening I have the first occasion to perform some maintenance
on one of our DataDomain systems.  Our DD's are all setup for NFS access,
so they are using FILE device type pools.

The plan is to:

- stop all processes/sessions writing to the DD based FILE stgpools
- mark the stgpool access=unavailable
- umount the NFS filesystem
- perform the DD work
- mount the NFS filesystem
- mark stgpool access=readwrite

Question:  What happens when a pool is changed to "access=unavailable"?

With tape, I can mark drive offline and the current process will
keep writing to it until it finishes.

Is the same true with access=unavailable for a FILE dev pool?
In other words, can I mark it unavailable FIRST, and then cancel
any processes/sessions using it.  This would prevent the wack-a-mole
of sessions/processes starting as I cancel others.

(note: disk pool will still be available during this work.  The disk pool
has a max size threshold set to force big files directly onto the DD. )

Rick


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Re: restore of windows 2008 r2 system via tsm

[Tim Brown]

Recently attempted with 2008r2 , destination server was
same created on hyperv, restore ok, reboot will only go
into system recovery, had done similar prior as mentioned
below with similar setup that reboot was ok less 



 On Tue, 12 Jun 2012 16:52:51 -0500
 "Huebner,Andy,FORT WORTH,IT" 
wrote:

> That looks correct.  Here is the meat of our restore
> batch:
> dsmc restore %systemdrive%\* -sub=yes -rep=all
> dsmc restore systemstate
> 
> We have not had anyone complain about missing parts.  I
> do not know if we have specifically restored an IIS
> server.
> 
> Andy Huebner
> 
> 
> -Original Message-
> From: ADSM: Dist Stor Manager
> [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Tim Brown
> Sent: Tuesday, June 12, 2012 4:12 PM
> To: ADSM-L@VM.MARIST.EDU
> Subject: [ADSM-L] restore of windows 2008 r2 system via
> tsm
> 
> Has anyone documented the steps to restore a 2008 R2
> system via TSM
> 
> I had done something similar with the a 2003 physical
> server restored to
> 
> a 2003 VM  OS. Same procedure works but resulting
> restored server is
> 
> missing IIS.
> 
> 
> 
> Install base OS same SP level
> 
> Restore c:
> 
> Restore d:
> 
> Restore systemstate
> 
> 
> 
> Thanks,
> 
> 
> 
> Tim Brown
> Supervisor Computer Operations
> 
> Central Hudson Gas & Electric
> 284 South Ave
> Poughkeepsie, NY 12601
> Email:   tbr...@cenhud.com <<
>  mailto:tbr...@cenhud.com>>
> Phone: 845-486-5643
> Fax: 845-486-5921
> Cell: 845-235-4255
> 
> 
> 
> 
> "This message contains confidential information and is
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Re: VTL's and D2D solutions

[Kevin Boatright]

Thanks everyone for your comments and useful information.
 
Kevin

>>> Richard Rhodes  7/3/2012 8:38 AM >>>
We use DataDomain with the NFS interface.  When we did our evaluation we
were only interested in NFS interface (not VTL).  We looked at  DataDomain
and Quantum DXi8500.   We wanted Exagrid to take part in the evaluation
but they had just released TSM support and decided not to respond to the
RFP.

Rick





From:   Kevin Boatright 
To: ADSM-L@VM.MARIST.EDU
Date:   07/02/2012 10:49 AM
Subject:VTL's and D2D solutions
Sent by:"ADSM: Dist Stor Manager" 



We are currently looking at adding a Disk to Disk backup solution.  Our
current solution has a 3584 tape library with LTO-5 drives using TKLM.

We have looked at Exagrid and Data Domain.  Also, I believe HP has a
solution.

We will need to have encryption on the device and the ability to replicate
between the two disk units.

Anyone have any comments or recommendations?

Thanks,
Kevin





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