Hi Joni, Which MEMORYEFFICIENT setting are you using? If you are using "YES", then you can also try DISKCACHEMETHOD (have a look at the doc for this option and I also suggest upgrading to 5.5.3, as there are some APARs that impact 5.5.2: IC60285, IC60540, and IC61957. In some cases, DISKCACHEMETHOD can be faster. But yes, it may be premature to go there at this time, just something to consider.
If you have enabled the QUIET option, disable that to get verbose dsmsched.log data. After the next backup, examine the timestamp differences between the "Incremental backup of volume 'xxx'" and the "ANS1898I ***** Processed nnn files *****" messages. This will give you an idea how long the TSM server query is taking, assuming you use MEMORYEFFICIENT NO. Check TCPWINDOWSIZE, if it is set to something higher than the default value (63) then try the default and see if that makes any difference; especially if the queries look particularly slow. Even if you use MEMORYEFFICIENT YES, examine the timestamp differences between the ANS1898I messages, especially when you see consecutive messages. A delay of more than a second between those messages, especially if the difference between the number of files processed is not that great 500 or 1000), might be indicative of a performance issue traversing the file system (and/or retrieving the active backup inventory from the TSM server when MEMORYEFFICIENT YES is used). Finally, the data transfer time is pretty high, about 4.5 hours to transfer 25 GB. The network rate is about 1.5 MB/sec, which doesn't strike me as particularly fast. The 4.5 hours accounts for about a quarter of the time. Best regards, Andy Raibeck IBM Software Group Tivoli Storage Manager Client Product Development Level 3 Team Lead Internal Notes e-mail: Andrew Raibeck/Hartford/i...@ibmus Internet e-mail: [email protected] IBM Tivoli Storage Manager support web page: http://www.ibm.com/support/entry/portal/Overview/Software/Tivoli/Tivoli_Storage_Manager "ADSM: Dist Stor Manager" <[email protected]> wrote on 2010-12-15 10:19:11: > From: "Moyer, Joni M" <[email protected]> > To: [email protected] > Date: 2010-12-15 10:21 > Subject: Re: Slow client backup > Sent by: "ADSM: Dist Stor Manager" <[email protected]> > > Hi Richard, > > It appears that there is a mixture of jfs, jfs2 and sybasedb. The > larger filesystems are jfs2 though. I think I'm going to look into > some of the suggestions made and go from there. > > Thanks! > > -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:[email protected]] On > Behalf Of Richard Sims > Sent: Tuesday, December 14, 2010 3:59 PM > To: [email protected] > Subject: Re: Slow client backup > > Out of curiosity, is the file system JFS or JFS2? The former > employs the old traditional, inefficient, linear directory > structure, while the latter employees B-tree database structure for > better performance. > > Richard Sims > > This e-mail and any attachments to it are confidential and are > intended solely for use of the individual or entity to whom they are > addressed. If you have received this e-mail in error, please notify > the sender immediately and then delete it. If you are not the > intended recipient, you must not keep, use, disclose, copy or > distribute this e-mail without the author's prior permission. The > views expressed in this e-mail message do not necessarily represent > the views of Highmark Inc., its subsidiaries, or affiliates.
