ADSM-L

Re: [ADSM-L] NDMP over IP Performance

2007-11-20 13:16:23
Subject: Re: [ADSM-L] NDMP over IP Performance
From: "Strand, Neil B." <NBStrand AT LMUS.LEGGMASON DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 20 Nov 2007 13:15:49 -0500
Ian,
   I am backing up a NetApp 3070 to a TSM 5.4.1.1 server on a P55a with
AIX 5.3 to a TS7520 VTL over ethernet.

There is a significant ethernet workload on the TSM server because I am
backing up 6 Netapp filers simultaneously.

Sar shows 100% cpu utilization on the TSM server during the processing
due to the high ethernet load.

I have one 50GB backup that takes 30 minutes (1.6GB/minute)

Make sure you are using TSM 5.4.1.1 or later because it addresses some
NDMP bugs in 5.4.1.0

You might check with your networking folks to ensure that all ethernet
settings are correct.


Cheers,
Neil Strand
Storage Engineer - Legg Mason
Baltimore, MD.
(410) 580-7491
Whatever you can do or believe you can, begin it.
Boldness has genius, power and magic.


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Ian-IT Smith
Sent: Tuesday, November 20, 2007 12:55 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] NDMP over IP Performance

Hi

I am running a TSM 5.4 Server, trying to backup/restore a NetApp filer
over IP to a native LTO3 tape storage pool. The backups are NDMP images,
with the TOC. The TOC goes to a separate disk storage pool.

I am experiencing terrible performance. In the region of 2 MBs for
backup and 0.2MBs restore!!!

Have checked the basic settings tcpnodelay etc and disk performance
etc...

Can anyone think of anything, (sorry, its expansive!!!) Also any real
world experience when it comes to performance? expected throughputs etc
And how to get them!!!


Ian Smith


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