Re: caching dns server after reboot

Glynn Clements (glynn@sensei.co.uk)
Wed, 18 Aug 1999 18:33:17 +0200 (GMT--1:00)


Kev wrote:

> > I have a caching DNS running on my machine which I hadn't rebooted for over
> > half year. Today I updated the kernel and rebooted the box. Now it seems
> > that all of the info that was cached is gone. Is it normal?
>
> Yes; the cache is in memory, not disk.

Also, bear in mind that DNS resource records (RRs) each have a
specified time-to-live (TTL) value. Once the TTL has been exceeded,
the record will be removed from the cache. A TTL setting of 24 hours
is typical, so it's not like your named will have had six months'
worth of records cached.

-- 
Glynn Clements <glynn@sensei.co.uk>

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