Re: Flushing the nameserver cache on AIX

Thank you all for your responses.

I was actually looking to flush the client side cache. It seems that
AIX does not cache nameserver entries on the client side. Is there a
way to confirm this? Can I run some tests to confirm?

Thanks,
Jigar


Ian Northeast wrote:
On Wed, 06 Sep 2006 16:55:11 -0700, Jigs wrote:

Hi All,

Can anyone help me with flushing the nameserver cache on AIX? Solaris has
an equivalent nscd daemon that caches name service requests. Does AIX have
a similar daemon?

You seem to be confusing two different things here. Nscd is a client side
caching daemon which can cache hosts and user database information.
Caching hosts information is generally disabled by default these days as
nameserver caches work better - nscd does not IME respect TTLs.

The nameserver cache is in the namserver itself not on the client.

As far as I know nscd has never been available on AIX, nor is there any
equivalent. It's not normally needed as it primary purpose is to
address performance issues in large NIS+ networks and AIX doesn't use NIS+
by default. AIX clients do not ever cache hosts information AFAIK.

As Roy said, the normal way to flush a bind nameserver's cache is "rndc
flush", but as far as I can see IBM do not ship rndc with AIX. You could
install it from a regular bind distribution. Otherwise you can stop and
restart bind, which flushes the cache as it is in memory. This was the
only way with earlier versions.

Regards, Ian

.

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