Hi Paul A strange volume config indeed....
One thing I'd ask is when was the last time this server was unloaded/reloaded ? Chris -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Paul van Dongen Sent: Friday, July 01, 2005 11:38 AM To: [email protected] Subject: [ADSM-L] Very slow DB backups Hello All, I was called to examine a TSM server in order to make some suggestions to improve performance. Upon arrival, I found out a not-so-standard configuration: TSM 5.1.6.4 on HP-UX 11 DB: 208 GB split on 208(!) volumes of 1GB each spread on 4 LUNs on an EMC box (95% in use) Log: 10 volumes of 1GB each, all on the same EMC LUN Diskpool: 101 volumes of 1GB each, all on the same EMC LUN I know that splitting this server should be the best solution, and there are other factors contributing to this big DB size, but I will stay away from this for while. The first I noticed is that there are two full DB backups being executed each day. They go to a LTO device class, and are taking some 3 to 4 hours to complete, including a stange 5 to 10 minute "sleep" between the backup command being issued and the actual start of the process. I tried to minimize this by setting the log to rollforward and trying to take a incremental backup. To my surprise, the triggered incremental (log became 70% full) started, with the same delay described above, but began to crawl, at 8000 pages per MINUTE. It would give me almost 4 hours to copy the 7 or so GB!! Naturally, I went back to the fulls until I found out what could be the problem. I am trying to talk to the admin of this server to upgrade to 5.2 or 5.3 and to review their disk config, but would like to hear from you if someone has been trough something alike, and of course the line of action that was taken. Thanks to all, Paul ___________________________ Disclaimer Notice ____________________ This message and any attachments are confidential and should only be read by those to whom they are addressed. If you are not the intended recipient, please contact us, delete the message from your computer and destroy any copies. Any distribution or copying without our prior permission is prohibited. Internet communications are not always secure and therefore the E.ON Group does not accept legal responsibility for this message. The recipient is responsible for verifying its authenticity before acting on the contents. Any views or opinions presented are solely those of the author and do not necessarily represent those of the E.ON Group. E.ON UK plc, Westwood Way, Westwood Business Park, Coventry, CV4 8LG. Registered in England & Wales No. 2366970 E.ON UK Trading Ltd, Westwood Way, Westwood Business Park, Coventry, CV4 8LG Registered in England & Wales No. 4178314 E.ON UK Trading Ltd is regulated by the Financial Services Authority to carry out investment activities. Telephone +44 (0) 2476 42 4000 Fax +44 (0) 2476 42 5432
