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/IBM@IBMUS
Internet e-mail: storman AT us.ibm DOT com
IBM Tivoli Storage Manager support web page:
http://www.ibm.com/support/entry/portal/Overview/Software/Tivoli/Tivoli_Storage_Manager
"ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu> wrote on 2010-12-15
10:19:11:
> From: "Moyer, Joni M" <joni.moyer AT HIGHMARK DOT COM>
> To: ADSM-L AT vm.marist DOT edu
> Date: 2010-12-15 10:21
> Subject: Re: Slow client backup
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu>
>
> 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:ADSM-L AT VM.MARIST DOT EDU] On
> Behalf Of Richard Sims
> Sent: Tuesday, December 14, 2010 3:59 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> 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
>
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