Thank you for reply!
We have the following situation:
Server TSM 3.7 @ MVS with 8 3590 Tapes and 80 GB Primary Storagepool, ATM
60 Clients (all NT4) with TSM 3.x and some big NT Servers with 2 or 3 100 GB
Volumes
and a lot of files on them. All over dedicated Tokenring into ATM backbone
A testrestore (compression off) of a single filespace(volume) uses only one
tape
(collocation on at filespace-level, reclaim 80%)and shows poor performance.
Most of the time the 2 MB/sec limit of Tokenring isn't touched.
Server CPU first 15 minutes very busy after that lazy.
Restore speed over all under 1 MB/sec.
Therefore we speak of a manageability of maximum 100 GB (~24 h restore time)
per filespace.
Now we intend to migrate to Netapp Toasters over Gigabit Ethernet.
What restoretimes can we expect? What can we improve?
With Regards
Stefan Holzwarth
> -----Ursprüngliche Nachricht-----
> Von: Shekhar Dhotre [mailto:shekhar.dhotre.b AT BAYER DOT COM]
> Gesendet am: Montag, 8. Januar 2001 16:59
> An: ADSM-L AT VM.MARIST DOT EDU
> Betreff: Re: AW: how to speed up NT restore?
>
>
>
> I was not restoring only one BOX , there were 3 Boxes
> production and development
> and another Sun box, ..Which I restored successfully.
> Assuming your data is on
> multiple volumes, TSM will try to mount all tapes, provided
> sufficient drives
> available ,I configured all available drives from stk9710 in
> daisy chain ..
> After that TSM utilized lot of drives, to restore data. TSM
> was mounting 5-6
> tapes at a time..
> As I was issuing commands like :
> dsmc restore /ora01 ?subdir=yes ?latest /ora01/
> dsmc restore /ora02 ?subdir=yes ?latest /ora02/
> dsmc restore /ora03 ?subdir=yes ?latest /ora03/
> dsmc restore /ora04 ?subdir=yes ?latest /ora04/
> dsmc restore /ora05 ?subdir=yes ?latest /ora05/
> dsmc restore /ora06 ?subdir=yes ?latest /ora06/
> dsmc restore /ora07 ?subdir=yes ?latest /ora07/
> dsmc restore /maetsro ?subdir=yes ?latest /maestro/
> etc?
>
> In your case if you are restoring only one BOX, I don't know
> how TSM will treat
> that operation.. , try starting multiple restore sessions.
> and don't use GUI
> to start multiple restore sessions , and
> It boost performance.. See page 62 of redbook using
> backup/Archive client
> version 4 release 1
> For more details..
>
> Let me know what exactly you are doing so that i can help you
> , can write me on
> shekhar.dhotre.b AT bayer DOT com ..
>
>
> Shekhar Dhotre.
> IBM certified AIX specilaist
> MCSE
> Tivoli Storage manager certified 4.1
>
>
>
>
>
>
>
> Stefan Holzwarth <stefan.holzwarth AT ZENTRALE.ADAC DOT DE>@VM.MARIST.EDU> on
> 01/08/2001 03:43:18 AM
>
> Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
>
> To: ADSM-L AT VM.MARIST DOT EDU
> cc:
>
> Subject: AW: how to speed up NT restore?
>
>
> How do you achive to use 10 tapes for restore
> - do you have 10 different filespaces?
>
> With Regards Stefan Holzwarth
>
> > -----Ursprüngliche Nachricht-----
> > Von: Shekhar Dhotre [mailto:shekhar.dhotre.b AT BAYER DOT COM]
> > Gesendet am: Freitag, 5. Januar 2001 15:11
> > An: ADSM-L AT VM.MARIST DOT EDU
> > Betreff: Re: how to speed up NT restore?
> >
> >
> > Hi i know your problem,
> > The first thing i did after coming back from DR test , is
> > that i enabled
> > collocation on tapepool and copypool ,
> > try to configure and define more drives to TSM , that is one
> > way to go around ,
> > I did restore with 8-10 drives , in stk9710
> > 2 gone bad after some time :-) but was sufficient.
> > Also check TCP/IP window size parameter in dsmserv.opt file
> > if it is 0 make it
> > 512 , recycle TSM ..That will help to
> > imrove performance ... .. You can start restartable restores
> > if TSM disconnect
> > in between restoration.
> > Good luck
> >
> > shekhar
> >
> >
> >
> >
> >
> > Peter Koblauch <Peter_Koblauch AT MANULIFE DOT COM>@VM.MARIST.EDU>
> > on 01/05/2001
> > 07:57:32 AM
> >
> > Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> >
> > Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> >
> >
> > To: ADSM-L AT VM.MARIST DOT EDU
> > cc:
> >
> > Subject: how to speed up NT restore?
> >
> >
> > Hello,
> >
> > I have been restoring an NT client for about 8 hours
> > now, a bare-metal
> > restore.
> > The server is an RS/6000 at ADSM 3.10.
> > The problem is that it until now only some MBs have been
> > restored and
> > the client
> > will need many GBs before it is done ... Looks like
> > this could take
> > days.
> >
> > The activity log and 'q session' shows that the restore
> > session is doing
> > numerous
> > ( DLT) tape mounts, and even when no mounts are
> > outstanding very little
> > data is
> > transferred from the server to the client. Looks like the
> > data for this
> > client might be spread
> > over hundreds of tapes. The storage pool for this client is not
> > collocated.
> >
> > Is there a way to speed up the restore?
> > Would it make sense to do an "export node" to tapes
> followed by an
> > "import node" in order to force
> > the data to fewer tapes or would I then just be spending
> > time in the
> > "export" instead?
> > Is there something else I can do?
> >
> > --
> > any help would be appreciated!
> >
> > thanks,
> > Peter Koblauch
> >
> >
> >
>
>
>
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