On Wed, Sep 21, 2011 at 10:18:54PM +0200, Christof Meerwald wrote: > On Wed, 21 Sep 2011 01:51:28 +0200, Stefan Schmidt wrote: > > On Tue, Sep 20, 2011 at 11:49 AM, Peter Gervai > ><[email protected]> wrote: > >> which reminds me: is there a way to wipe the packet cache? rec_control > >> wipe-cache simply doesn't. > > It does if you specify something that it would wipe off the cache. > > I don't see any evidence that it does wipe anything from the packet > cache. > > E.g. do (with threads=1 to only have a single packet cache): > > $ host -vt a www.powerdns.com > > www.powerdns.com. 3600 IN CNAME powerdns.com. > powerdns.com. 3600 IN A 85.17.219.140 > > $ host -vt a Www.powerdns.com > > Www.powerdns.com. 3593 IN CNAME powerdns.com. > powerdns.com. 3593 IN A 85.17.219.140 > > Ok, so this one must have come from the cache (as TTL < 3600). > > $ rec_control wipe-cache www.powerdns.com Www.powerdns.com > wiped 1 records, 0 negative records > > $ host -vt a www.powerdns.com > > www.powerdns.com. 3566 IN CNAME powerdns.com. > powerdns.com. 3566 IN A 85.17.219.140 > > $ host -vt a www.powerdns.com > > Www.powerdns.com. 3564 IN CNAME powerdns.com. > powerdns.com. 3564 IN A 85.17.219.140 > > Although I just wiped the cache, the responses still came from some > cache (presumably the packet cache as a dump-cache confirms that the > entry is gone there). > > $ host -vt a www.powerdns.com > > WWW.powerdns.com. 3600 IN CNAME powerdns.com. > powerdns.com. 3600 IN A 85.17.219.140 > > This finally got around the packet cache (which I guess is case > sensitive) and retrieved it again from the auth server. > > > Christof >
Please see http://wiki.powerdns.com/trac/ticket/333 for wiping the packet cache. Aki Tuomi
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