Ian, Nothing special on the NetApp. - The data being backed up is a snapshot of a LUN and there are no NAS shares on the filer so there is little contention for ethernet. - I do have multiple Gb ethernet interfaces VIFed on the filer. - Verify that you are using a Gb interface and not the 100Mb onboard interface if you are using a FAS960 or some other ancient filer.
Nothing special on the TSM server. - I have virtualfsmap to the snapshot defined. The snapshot is created with snapmanager for Exchange once a day. - Backups are run from an admin script on the TSM server. - I backup about 5TB from 6 filers in 10 hours to a single TSM server using NDMP over ethernet. My bottleneck is the CPU on the TSM server which is consistantly pegged at 100% during the backup evolution. Things to look at: 1. Verify that your ethernet settings on both the TSM server and NAS filer AND the switch between them are all consistent and correct. There should be no retransmits. If there is a router between your filer and TSM server, the routing delay may be a factor. If the filer is a NAS filer, there may be contention for ethernet bandwidth. 2. Take the tape out of the picture by creating a small disk pool of known performance and designate it as the target and run a test backup. 3. If your SAN interface is the bottleneck, play around with your num_cmd_elems, buffers and max_xfr_size (on AIX). 4. Ensure your filer is configured for performance. Are you using flex vols with the aggregrate spread across as many disks as possible (good performance) or traditional vols with a couple of disks (not so good performance)? 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:[EMAIL PROTECTED] On Behalf Of Ian-IT Smith Sent: Tuesday, November 20, 2007 1:27 PM To: [email protected] Subject: Re: [ADSM-L] NDMP over IP Performance That performance is superb!! To get that, did you go with the defaults, or was any significant tuning done? Were there any filer settings that needed to be changed? Also, was there any network gotchas that you encountered? Thanks so so much! Ian "Strand, Neil B." <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[email protected]> 20/11/2007 18:15 Please respond to "ADSM: Dist Stor Manager" <[email protected]> To [email protected] cc Subject Re: [ADSM-L] NDMP over IP Performance 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:[EMAIL PROTECTED] On Behalf Of Ian-IT Smith Sent: Tuesday, November 20, 2007 12:55 PM To: [email protected] 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 --- This e-mail may contain confidential and/or privileged information. 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