Just to chime in on this, I've managed to bring AIX 5.1 to a crawl (30+ second response times from an ssh terminal session) when creating large files on JFS2 filesystems, WITH certain vmtune settings.
My recommendation, as others on this list may know, is to simply use raw files. Cuts out many of the normal overheads.
On Thursday, Sep 4, 2003, at 21:40 Australia/Sydney, Rodney clark wrote:
Ah jfs2 we have run into multiple problems with jfs2 on aix 5.2 But you may need to be aware that the memory pool tuning has been changed for jfs2. jfs2 caches in the Client area of memory that was usually reserved for nfs mounts. basically you need to stop putting maxperm at 75% to say 50% or 60% and then raise the max client% upto whatever you put maxperm to. You don't mention how the logging is setup do not use inline logging, and dedicate a disk for logging. that means jfs2 log's.
regards Rodney Clark
-----Original Message----- From: William F. Colwell [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 03, 2003 11:45 PM To: [EMAIL PROTECTED] Subject: Re: DSMFMT takes forever ( 15 hours). 100 gb
Duane,
I don't have an answer for your problem, but I can tell you the same thing happens on solaris.
My main servers are using raw partitions as recommended and they scream. But to put up a test server I use space on filesystems. For a server to run decently the filesystem has to be mounted with 'forcedirectio,nologging' mount parameters. But strangely, the reverse is true for formatting. When I set up a test instance I have to unmount & remount the filesystem without forcedirectio,nologging. After the formatting is done I go back to forcedirectio,nologging to run the server.
The other day I formatted 37G in about 10 minutes.
Maybe aix has similar options.
Hope this helps,
Bill At 12:22 PM 9/3/2003, you wrote:Does anyone know of or had problems with formatting additional space for diskpools ?
TSM server : AIX 5.1 ML3 64-bit enabled. 2GB memory 2 cpu H80
Disk type : 6 member raid set about 700 GB
JFS2
Trying to format 100gb diskpool. Each time I have tried it brings the TSM server to almost a stand still. TSM is up on the box but nothing is running during 8 hours of the format. Should be more than enough time to format 100gb of space.
Any ideas ?
Duane Ochs Enterprise Computing
Quad/Graphics
Sussex, Wisconsin 414-566-2375 phone 414-917-0736 beeper [EMAIL PROTECTED] www.QG.com
---------- Bill Colwell C. S. Draper Lab Cambridge Ma.
----------------------------------------------------------------- ATTENTION: The information in this electronic mail message is private and confidential, and only intended for the addressee. Should you receive this message by mistake, you are hereby notified that any disclosure, reproduction, distribution or use of this message is strictly prohibited. Please inform the sender by reply transmission and delete the message without copying or opening it.
Messages and attachments are scanned for all viruses known. If this message contains password-protected attachments, the files have NOT been scanned for viruses by the ING mail domain. Always scan attachments before opening them. -----------------------------------------------------------------
-- Paul Ripke Unix/OpenVMS/TSM/DBA 101 reasons why you can't find your Sysadmin: 68: It's 9AM. He/She is not working that late. -- Koos van den Hout
