Number of File descriptors

Chuck Winters (cwinters@atl.lmco.com)
Fri, 13 Jul 2001 09:59:34 -0400


Hello All,
My interest has been peaked by a recent email. At one point, I heard two people speaking
about how some database guy wanted to have 2000 open files(or something crazy like that).
They said that he must be crazy because the kernel does a sequential search through the open
file descriptors. Anyway, I read a posting an a mail list that someone wanted select to
select on 3000 files. Alright, the question(Finally!):
To have select() select on 3000 file descriptors, they must be open. That's 3000 open
files. Will select be ultra slow trying to select on 3000 file descriptors? Also,
what is the clarification on the kernel doing a sequential search through the open
file descriptors?

Thanks In Advance,
Chuck Winters
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