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Re: Looking for guidance on filesystem tuning
On Nov 14, 2009, at 11:53 AM, Louis Guillaume wrote:
> I'm about to upgrade my mail server and I was looking for some
> NetBSD-specific guidance wrt, primarily, the filesystem tuning. But any info
> regarding kernel options to improve performance would be great too.
> Here are the details:
> o We will be using cyrus-imapd from pkgsrc.
> o The file system will be part of a RAIDFRAME-mirrored pair of
> SCSI disks.
> o Many of the messages will contain large attachments.
> o The server hardware platform is i386.
> o We will be using regular builds of the netbsd-5 "stable"
> The Tuning chapter in the NetBSD guide seems to need a fixup too; there is no
> mention of WABPL, which appears to be the wave of the future (at least for
> Any guidance would be helpful, as well as any pointers towards good
I don't have specific suggestions on tuning, but you may want to say something
about the expected load: number of users, number of messages/hour, etc. How
old or new is the platform? Often, adding a lot more RAM is a very easy way to
upgrade performance, but you can have a lot more RAM with amd64.
--Steve Bellovin, http://www.cs.columbia.edu/~smb
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