TCP limitation in UNIX (was: Client/Server - rpc) - Thread - go-pugleaf

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3 total messages Started by Idalina Videira Wed, 04 Nov 1992 12:55

TCP limitation in UNIX (was: Client/Server - rpc)

#32

Author: Idalina Videira
Date: Wed, 04 Nov 1992 12:55

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In a post in this thread Robert Cooper referred the problem of
running out of file descriptors when using TCP based communication.

I heard that in newer versions of UNIX the number of file descriptors
a proccess can use simultaneously is around a thousand but I don't
know in exactly what systems. Does someone have accurate information
on this?  

Idalina Videira
imv@inesc.pt

Re: TCP limitation in UNIX (was: Client/Server - rpc)

#34

Author: David Emery
Date: Wed, 04 Nov 1992 18:06

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Some implementations of Unix support an "increased" number of file
descriptors, but POSIX only *requires* _16_ open files at one time
(_POSIX_FILE_MAX).  Using more than 16 could be a portability problem
if POSIX compliance is an issue.  Of course, TCP is not (currently)
part of POSIX, but there are plenty of TCP implementations on POSIX.  

				dave

Re: TCP limitation in UNIX (was: Client/Server - rpc)

#55

Author: Jim Tomlinson
Date: Fri, 06 Nov 1992 21:43

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1415 bytes

In article <IMV.92Nov4125505@yosemite.inesc.pt>, imv@yosemite.inesc.pt (Idalina Videira) writes:
|> In a post in this thread Robert Cooper referred the problem of
|> running out of file descriptors when using TCP based communication.
|> 
|> I heard that in newer versions of UNIX the number of file descriptors
|> a proccess can use simultaneously is around a thousand but I don't
|> know in exactly what systems. Does someone have accurate information
|> on this?  

Sorry to waste bandwidth; mail keeps bouncing.  This number is
configurable (at least with Silicon Graphics' IRIX) via a text file (if
you're root).  Once you reconfigure a bootable kernel (on IRIX, with
the 'lboot' command), you reboot and the new value is in effect.
-- 
Jim Tomlinson    BoGART Project    Boeing Computer Services    Bellevue, WA
jdt@voodoo.boeing.com       ...uunet!bcstec!voodoo!jdt        (206)865-6578 
          "It's the end of the world as we know it; I feel fine."

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