On Wed, Dec 20, 2000 at 03:28:18AM +0100, Markus Stumpf wrote:
> However one of our mailservers is sitting on an elder machine with only
> one disk (we're moving it to a newer/fast machine with raid by now)
> and what I did is experience the last weeks was a performance loss
> simply by having qmail-smtpd read in about 700 MB rcpthosts and
> qmail-remote read in a 300 KB smtproutes file on every incarnation.
> a cdb would do any good here, as the lookup would be faster, but a cdb
> is even bigger than the plain files.
cdb lookup routines mmap the cdb file into the process address space
and then access it. If your OS has a strong VM system this makes cdb
lookups very fast access-wise.
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