Greetings, We've been using TSM with NDMP for over a year, and while we want our customers to use our service rather than Legato (the predecessor), there are some limitations:
(1) There are situations where TSM (or NetApp/NDMP) does not translate certain file/path names properly, and TOC builds fail. We have been working with IBM quite a lot on this, and have resolved *most* issues; (2) TOC loads on the TSM server are *excruciatingly* slow. We have thrown all the hardware and memory we can at the server, and some TOC loads still take 4 hours (yes, that is not a typographical error). Granted these are multi-TB volumes with millions of files, still there should be a better way to get the TOC records from disk to database. That's another problem we have open with IBM, and we are working with their performance people. (3) We recommend defining as many virtual mapping points as possible: volume restores can be done in parallel, and above mentioned TOC loads are quicker. It adds another level of administration, but no big deal. We recently restored a 3.3TB volume which took about 29 hours, using one 9940B drive. Overall we are happier with TSM using NDMP than backing up these large filers over TCP, through a TSM backup client (though file level restore was/is a lot better there). John
Folks is anyone out there using TSM (ndmp for net apps) we seem to have struck a bug/limitation with netbackup and are looking at moving to TSM. need to be confident that it will not bug out at less than 3 TB Allan Mills | AIX and TSM Administrator Business & Technology Services | New South Wales Police 8835 9286 (internal 29286) This message and any attachment is confidential and may be privileged or otherwise protected from disclosure. If you have received it by mistake, please let us know by reply and then delete it from your system; you should not copy the message or disclose its contents to anyone. All mail is subject to content scanning for possible violation of New South Wales Police electronic Mail Policy. All persons are required to familiarise themselves with the content of the policy located on the MEMO Bulletin Board and on the NSWP Intranet. This message and any attachment is confidential and may be privileged or otherwise protected from disclosure. If you have received it by mistake, please let us know by reply and then delete it from your system; you should not copy the message or disclose its contents to anyone.
