Re: [courier-users] Performance tuning.

2002-06-14 Thread Theodore Knab 

Some Operating Systems (and Distributions) work better on specific 
platforms.

I have found OpenBSD to be very good for SUN systems.

If OpenBSD had suppport fot the Enterprise 3000, I would recommend it.

But, it does not seem to.
http://www.openbsd.org/sparc64.html#hwdocs

As for Linux, I have only found 2 distributions that have Enterprise 3000 
support:
Debian
Suse

http://www.google.com/search?q=%22enterprise+3000%22++linuxhl=enlr=

 Remember that Sun's stuff will never be as fast as Linux, just much more
 expensive and have nicer boxes ;-).

Does Solaris 8 allow you to recompile the kernel ?

If it does, you may need recompile it to maximize multiprocessor 
preformance.

If not, I look for a performance patch for your multiprocessor system.

http://www.google.com/search?q=%22enterprise+3000%22++solaris+performance+p
atchhl=enlr=

http://www.google.com/search?hl=enlr=q=multiprocessor+patch+solarisspell
=1


Theodore Knab
-
Washington College
Chestertown, Maryland, USA
[Unix] Systems Engineer
x7419

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Re: [courier-users] Performance tuning.

2002-06-13 Thread Juha Saarinen 

On Thu, 13 Jun 2002, Don Werve wrote:

  I'm the qmail-Nazi at work, slowly converting the systems at my company
  from legacy Sendmail installations over to qmail, primarily for security
  reasons -- Sendmail is, in some small ways, easier to administrate, but
  I don't like the buffer-overflow-du-jour problems that it is riddled with.

  We're using Courier to provide IMAP and POP3 services to our users from
  their individual ~/Maildir directories.  Only problem is, this setup
  appears to work about 30% slower than our previous IMAP setup on an
  ancient Pentium-II/350, running Linux and Cyrus IMAP (which is a PITA to
  administrate compared to Courier, and doesn't natively support Maildirs).

  Any pointers as to performance-enhancing tips?  The system is a Sun
  Enterprise 3000, with 6x138MHz CPUs and a nice little hardware SCSI
  RAID-5, running Solaris 8.

How are you mounting the file systems on the Slowaris box? Try mounting
them asynch and without access time stamping (noatime).

http://ultra.litpixel.com:84/articles/ftat/frameset.html

Remember that Sun's stuff will never be as fast as Linux, just much more
expensive and have nicer boxes ;-).

-- 
Juha Saarinen


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