From: Bill Verzal (BVerzal@KOMATSUNA.COM)
Date: Thu Jun 26 2003 - 13:41:41 EDT
I would say that a question like this is very much like "How much swap
space is needed?"
If your filesystems are fairly static, then a single JFSlog will suffice.
If you have high amounts of I/O to filesystems, then more may be in order.
The system error log will tell you if there are JFSlog shortcomings.
I've run DB2 backups to 136 concurrent 2GB mount points with a single
JFSlog and never had any JFSlog problems.
BV
--------------------------------------------------------
Bill Verzal
AIX Administrator, Komatsu America
(847) 970-3726 - direct
(847) 970-4184 - fax
|---------+---------------------------->
| | Kenny Madsen |
| | <kennymadsen@CABL|
| | EONE.NET> |
| | Sent by: IBM AIX |
| | Discussion List |
| | <aix-l@Princeton.|
| | EDU> |
| | |
| | |
| | 06/26/2003 11:34 |
| | AM |
| | Please respond to|
| | IBM AIX |
| | Discussion List |
| | |
|---------+---------------------------->
>-------------------------------------------------------------------------------------------------------------------------------|
| |
| To: aix-l@Princeton.EDU |
| cc: |
| Subject: Re: Sizing JFSLog |
>-------------------------------------------------------------------------------------------------------------------------------|
I am in an AIX performance tunning class as of this writing.
We were told 4 mb for each 2 gig of file system space.
-----Original Message-----
From: "IBM AIX Discussion List" <aix-l@Princeton.EDU> on behalf of
"Theresa Sarver" <tsarver.IFMC@SDPS.ORG>
Sent: Thu, 26 Jun 2003 12:22:12 -0400
To: "aix-l@Princeton.EDU" <aix-l@Princeton.EDU>
Subject: Sizing JFSLog
Hi All;
What is the proper size of the JFSLog on an AIX system (either 433 or 5L)?
I have always set it at the default of 1PP. However, I have a colleague
that is saying that "IBM recommends a 2 MB log size per 1 GB of file system
space."
I can't find any documentation stating that either one is correct...does
anyone know where I might find some?
Thank you!
Theresa
This archive was generated by hypermail 2.1.7 : Wed Apr 09 2008 - 22:16:58 EDT