Thanks much
Email to bruce.hayw...@mtsallstream.com
-Original Message-
From: Chris Thompson [mailto:c...@hermes.cam.ac.uk] On Behalf
Of Chris Thompson
Sent: Friday, March 06, 2009 12:12 PM
To: Hayward, Bruce
Cc: Bind Users Mailing List
Subject: Re: Settings for File Descriptors
On Mar 6 2009, Hayward, Bruce wrote:
I am trying to understand file descriptors with bind in
mind, and what
they should be set at in conjunction with the OS.
We are running 9.5.1 P1 on Solaris 10 (patched up), which is
basically
all that is on each server.
Some questions:
1) Is there a recommended setting (number of FDs)?
BIND will set the file descriptor resource limit to
unlimited when it starts up, unless you tell it not to in
the options setting.
Just forget about it.
2) Better to set this at the kernal level with the set rlimit, or a
compile option with configure, or both
This doesn't apply to BIND (see above) but I think it foolish
to mess around with /etc/system to change resource limits for
all processes, when you can easily use a targetted ulimit
command in the calling script for the process that actually needs it.
BIND doesn't have a compile option for this, anyway, AFAIK.
Are you confusing this with the FD_SETSIZE value? BIND
9.5.1-P1 on Solaris will not be using select(3c) anyway, so
that isn't an issue.
3) Should the number be correlated to the number of
recursive clients?
4) Different on the auth servers?
If you did go out of your way to make it other than
unlimited, then yes to both. But don't.
--
Chris Thompson
Email: c...@cam.ac.uk
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