Oracle Enterprise Edition can parallelise the backup- i.e there are multiple channels opened to the SBT_TAPE.
This is defined in the backup script or repository. Usually as a rule of thumb, limited by the number of CPUs on the server. MAXNUMMP should match the number of channels allocated by the RMAN backup scripts. The MAXNUMMP specifies the number of tape mounts required in the TSM subsystem. _____________________________ Ian Smith SAN/TSM Specialist Hitachi Data Systems Certified Professional IBM Tivoli Storage Manager Certified Consultant -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Anker Lerret Sent: 14 September 2006 16:54 To: [email protected] Subject: [ADSM-L] MAXNUMMP This is my first post here after months of lurking. I'd like to start by thanking Richard Sims for his marvelous ADSM.QuickFacts. Because of that file, my employer thinks that I'm far smarter that I am. Thank you! There's one thing, though, that I haven't been able to figure out in the TSM doco, the ADSM-L archive or even ADSM.QuickFacts. Can someone explain (using one syllable words) what MAXNUMMP is? We have ongoing intermittent problems with Oracle TDP and Windows backups. Here's a typical error: ORA-19511: Error received from media manager layer, error text: ANS0326E (RC41) This node has exceeded its maximum number of mount points. When this first started happening (after we upgraded to TSM 5.3), I set MAXNUMMP to the number of tape drives, but that turned out to be A Very Bad Thing (though I forget why). Now we bump up the MAXNUMMP number by one each night that a backup fails until we get a number that works. Surely someone can give me a formula that will take me directly to the right value. Actually, I don't understand why these backups are calling for multiple drives anyway. They're routine Oracle log backups that happen many times a day and run successfully 99.9% of the time. Similarly, the Windows backups are routine nightly backups. I'm not trying to stream to multiple tapes. Why shouldn't MAXNUMMP=1 do the job? Our environment is TSM server 5.3.3.0 running on AIX 5.3 at ML04 on a p550. We have 8 T10K drives in an STK SL8500 library. The Oracle TDPs are mostly on Sun boxes and the Windows boxes are a variety of Redmond versions (though the errors aren't specific to any version). We have upgraded the TSM clients to the bleeding edge and still see these errors. Thanks for any help and for all I've learned in this forum, anker _____________________________________________________________ This email (including any attachments to it) is confidential, legally privileged, subject to copyright and is sent for the personal attention of the intended recipient only. If you have received this email in error, please advise us immediately and delete it. You are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. Although we have taken reasonable precautions to ensure no viruses are present in this email, we cannot accept responsibility for any loss or damage arising from the viruses in this email or attachments. We exclude any liability for the content of this email, or for the consequences of any actions taken on the basis of the information provided in this email or its attachments, unless that information is subsequently confirmed in writing. If this email contains an offer, that should be considered as an invitation to treat. _____________________________________________________________
