ADSM-L

Re: How long will be backup task finished ?

2001-03-01 16:11:13
Subject: Re: How long will be backup task finished ?
From: James Thompson <mezron AT HOTMAIL DOT COM>
Date: Thu, 1 Mar 2001 14:11:42 -0700
Also keep in mind that you will need to update the node on the
TSM server so that it can use 6 mountpoints.
i.e. update node oraclenode maxnummp=6
Also in your rman script you must allocate 6 channels.

James Thompson

From: Suad Musovich <suad AT CCU1.AUCKLAND.AC DOT NZ>
Reply-To: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: How long will be backup task finished ?
Date: Thu, 1 Mar 2001 21:59:56 +1300

How often will this take (the cold backup)?

You should have, a maximum, of 2 tape drives per SCSI connection(3
controllers).
Best to have 1 drive -> 1 SCSI controller.

The major bottleneck is the ability of the database to pump, at least
90MB(6 x 15)
per second to the tape drives. There is also the consideration that the
data
might not steadily stream to the tape drives (LTO start/stop
characteristics not
that good).

Using a diskpool as a buffer would need, at least, twice the performance
characteristics of the tape stream rate above. It would ensure the tapes
are
streaming but it would need to be very fast.

Don't forget to tell us a report how it ended up going.

Cheers, Suad
--
 Suad Musovich (s.musovich AT auckland.ac DOT nz)
 Unix Support, ITSS Operations
 University of Auckland

On Wed, Feb 28, 2001 at 02:14:09PM +0200, Marc Layne wrote:
> Considering that each drive can handle 15MB/sec natively (30 MB/sec
> compressed) this relates to 54GB/hour per drive therefore 6 drives can
do
> 324GB/hour natively or 600GB in two hours native speed. Yes the drive
can
> handle it. The M80 also should be able to handle the load. The real
question
> is whether you get TDP for oracle to multistream across all four drives.
> This sometimes depends on the database layout. If you have multiple
smaller
> tablespaces or 1 or 2 large tablespaces. Also how much memory does the
M80
> have?
>
> Thanks
> Marc
> _________________________________________________
> Marc Layne
> Product Manager - Services, Storage and Software Solutions
> Faritec
> Mobile: +27 82 4169086        email: mlayne AT faritec.co DOT za
> <mailto:mlayne AT faritec.co DOT za>
> Office:  + 27 21 7629702               http://www.faritec.co.za/
> _________________________________________________
>
>
> -----Original Message-----
> From: Shen Ou [mailto:shenou AT CN.IBM DOT COM]
> Sent: 28 February 2001 01:14
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: How long will be backup task finished ?
>
>
> My customer has a Oracle 8.1.6 database on IBM AIX M80 (4 CPU) and its
size
> is 600G. He want to do a full backup using IBM LTO 3584 with 6 drivers.
The
> LTO 3584 attach with M80 using SCSI 2 Line. TSM server and client are on
> M80 at the same time.He want to finish the backup task in 4 hours using
TDP
> for oracle,TSM 4.1 and LTO device.
>
> My question is can he finish the backup task in four hours ?  If can't ,
> what's the bottleneck ?
>
> Thanks .
>
>    Shen Ou
>    Tivoli System
>    IBM China Shanghai Software Center
>
> "This message may contain information which is confidential, private or
> privileged in nature.   If you are not the intended recipient, you may
not
> peruse, use, disseminate, distribute or copy this message or file which
is
> attached to this message.  If you have received this message in error,
> please notify the sender immediately by e-mail,  facsimile or telephone
and
> thereafter return and/or destroy the original message.
>  Any views of this communication are those of the sender except where
the
> sender specifically states them to be those of Faritec (Proprietary)
Limited
> ("Faritec") and/or Midrange Distribution Services (Pty) Ltd.
> Please note that the recipient must scan this e-mail and any attached
files
> for viruses and the like.  While we do everything possible to protect
> information from viruses, Faritec accepts no liability of whatever
nature
> for any loss, liability, damage or expense resulting directly or
indirectly
> from the access and/or downloading of any files which are attached to
this
> e-mail message."

_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com
<Prev in Thread] Current Thread [Next in Thread>