Overview speeds and methods

Katsuhiro Kondou Katsuhiro_Kondou at isc.org
Tue Aug 13 02:53:56 UTC 2002

In article <E17eQzW-0007fQ-00 at batzmaru.gol.ad.jp>,
	Christian Balzer <chibi at gol.com> wrote;

} 1. Which is considered the overall fastest overview method? (I read that 
} classic is best for readers)

It depends on your enviroment.  How many articles
are you fed?  How many simultaneous readers do you
have?  I've noted many times on the list that the
reason why I wrote buffindexed is that tradindexed
was too slow to handle fullfeed on my test
environment(signle disk :).  ovdb is said to be
fast but I've never compared to both on the same
environment.  I was quite happy with my own
implementation at my previous job, while others
often reported on the list that buffer is corrupted.

} 2. Will buffindexed as a regular file benefit from caching as opposed to
} the buffers being raw devices?

I haven't tried buffers on raw devices, but it may
have.  I had 4GB memory and 20*2GB buffers for
overview(5% used) in the box, and over 400 simultaneous
readers, it's fed up to 300GB/day.  It worked without
any particular stress.
Katsuhiro Kondou

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