From: Green, Simon (Simon.Green@EU.ALTRIA.COM)
Date: Thu Mar 27 2003 - 12:07:42 EST
I think I've extended a JFSlog just twice since I've been working with AIX,
(six or seven years). This is NOT the sort of thing you would do routinely
as it's a PITA. It cannot be done with the filesystems mounted.
Set it up correctly when the volume group is created and you'll never need
to touch it again. Give it two partitions if you're paranoid. Better
still, create several JFSlogs, as I said; this'll give better performance as
well, (reduces contention and disk-head movement).
In most cases, one PP actually seems to be adequate for quite large VGs;
certainly with database systems. (Oracle, on filesystems not raw LVs; with
or without SAP/R3.)
It's possible that other types of load might put more strain on the JFSlogs.
Simon Green
Altria ITSC Europe s.a.r.l.
AIX-L Archive at http://marc.theaimsgroup.com/?l=aix-l&r=1&w=2
AIX FAQ at http://www.faqs.org/faqs/aix-faq/
N.B. Unsolicited email from vendors will seldom be appreciated.
> -----Original Message-----
> From: MARLON BORBA [mailto:MBORBA@TRF3.GOV.BR]
> Sent: 27 March 2003 16:43
> To: aix-l@Princeton.EDU
> Subject: Re: Formula for sizing jfslog
>
>
> So what happens if a 'lazy' AIX administrator forgets to do
> the adequate jfslog expansion? I've seen several 'soi-disant'
> sysadmins increasing the size of a logical volume without
> modifying jfslog...
This archive was generated by hypermail 2.1.7 : Wed Apr 09 2008 - 22:16:41 EDT