bsdtar eats CPU when extracting POSIX tar archive
kuriyama at imgsrc.co.jp
Thu Aug 26 00:02:25 PDT 2004
At Wed, 25 Aug 2004 23:55:20 -0700,
Tim Kientzle wrote:
> Looks like it could be network related. I see almost
> 5,000 calls to recvfrom. With that much network I/O,
> any network issues on that box would definitely cause problems.
> Do you know what's causing that? Is it uid/gid lookups,
> perhaps? bsdtar does not (yet) do any caching of uid/gid
> lookups; once I implement that, it will definitely have a
> big performance impact for folks using NIS or LDAP. But
> that still seems like a lot. I wonder if there's something
> else going on?
Hmm, yes, this box uses NIS as client. I confirmed a lot of NIS
packets during extraction. Is GNU tar implemented such a caching?
Using gtar is faster like usual on my box.
Jun Kuriyama <kuriyama at imgsrc.co.jp> // IMG SRC, Inc.
<kuriyama at FreeBSD.org> // FreeBSD Project
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