ADSM-L

Re: Backup in parallel from one big node

2000-07-27 14:14:28
Subject: Re: Backup in parallel from one big node
From: "Cook, Dwight E" <cookde AT BP DOT COM>
Date: Thu, 27 Jul 2000 13:14:28 -0500
What do all the other sessions show during the backups...
"MediaWait" ? ? ?
if so, if you do a "q sess f=d" what volser is listed as being waited on? ?
? the one currently mounted ?

now you are backing up this application by shutting down the DB and letting
incremental processing back it up  ? ? ?

Ya know you could just define a diskpool, about 1/5 to 1/4 of the size of
your oracle db space (so aobut 70 GB) and backup to the diskpool using
client compression... it would run a whole lot faster (wall clock time)
'cause you could have 20 or 30 client sessions running concurrently ;-)
then use disk cache to always have the most recent backup on disk for a
restore ;-) ;-)

Dwight

> ----------
> From:         Maria Paz Gimeno[SMTP:mpgimeno AT IBERCOM DOT ES]
> Reply To:     ADSM: Dist Stor Manager
> Sent:         Thursday, July 27, 2000 12:30 PM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Backup in parallel from one big node
>
> I am here again, I know there is people out there that have large shops
> that perform the backup in parallel to more than one tape drive. I am
> unable to do this, I wonder what I am doing wrong. Can someone help? I
> will be very gratefull, I am desperate to start production in this
> customer.
>
> My situation is the following:
> HP-UX 11.0
> TSM 3.7.3 server
> TSM 3.7.2 client
> I am using 2 3590 drives in a 3494.
> The client is in the same system as the server, and the major aplication
> is SAP with an Oracle data base of 210 GB spread in multiple filespaces.
> We have in the client resourceutilization 7, a maxnumpt 2 (two drives), in
> the storage pool collocation turned on.
> In the dsm.opt file we include all filespaces we want the system to
> backup, around 20 of them.
> We hope to see both tapes being used, there is no other session running at
> the time of backup, but what we see is the first tape used until it
> finish, normally with the error I posted yesterday, and then the second
> drive is used with another tape, but never both tapes simultaneously.
> What I am doing wrong or what else need to be done to start both sessions
> in parallel?
> The system creates multiple sessions but appears that they are not used,
> is very complicated to understand the log and see what happen.
> I really apreciate any help you could give, documentation appears not to
> have any information on parallel sessions, you are my only hope.
> Many thanks
> Maria
>
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