High availability email server...

Andrew Morgan morgan at orst.edu
Mon Jul 31 19:08:43 EDT 2006

On Mon, 31 Jul 2006, Wil Cooley wrote:

> Well, 32MB is small for a write-heavy filesystem.  But if you're not
> seeing any problems with kjournald stalling while it flushes, then it
> might not be worth the trouble of re-creating the journal as a larger
> size.  It's unlikely to hurt anything, but I wouldn't make it huge
> priority.  Did you also read the LOPSA post from Ted Ts'o that I linked
> to in the section above the instructions?

Yeah, I guess this is something I should do when we have a downtime 
window.  The only performance problem I've noticed is that things get 
pretty sluggish when I unplug half of the power feed to the SAN (we were 
doing a power upgrade in our data center).  The write cache is disabled in 
this situation and things got really bad for a while.  :)

Increasing the size of the journal may have helped during that time, but 
who knows.  In general, I think an IMAP server does more reads than 
writes, but every little bit helps!


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