[Pdns-users] Re: PowerDNS performance compared to othernameservers

[Geier, Michael D]

I agree.

I am in the process of evaluating DNS servers to replace the current
POS.
Requirements:
	Dynamic DNS ala DHCP
	SQL Backend (preferably Oracle)
	Speed would be nice

I just found PDNS today.  If anyone would like to comment on the above, 
possibly pointing to optimal configuration/setup for Linux (RHEL), I
would appreciate it.	

Michael Geier
Enterprise RAC, Network Operations, DNS Administrator
          email: Michael.D.Geier at erac.com
          phone: 314.512.4452


> -----Original Message-----
> From: pdns-users-bounces at mailman.powerdns.com 
> [mailto:pdns-users-bounces at mailman.powerdns.com] On Behalf Of 
> Markus Welsch
> Sent: Tuesday, December 02, 2003 10:53 AM
> To: bert hubert
> Cc: pdns-users at mailman.powerdns.com
> Subject: Re: [Pdns-users] Re: PowerDNS performance compared 
> to othernameservers
> 
> 
> > Have you tried running your test a second time? PowerDNS can be 
> > considered a 'lazy loader' of zones. The first time you run 
> PowerDNS, 
> > the cache is cold and all queries need database access.
> 
> When speaking of queries, when will database access be made 
> besides the 
> first query?
> 
> > Secondly, PowerDNS sometimes is very slow on SMP systems. This is a 
> > glibc issue. Symptoms are massive 'cs' counts in vmstat 1 output 
> > caused by spinlocks that 'overspin'.
> > 
> > We tested with .org and saw 50.000 q/s on a tuned setup, so 
> I find 13 
> > queries/second highly disappointing and three orders of magnitude 
> > below what I would expect.
> 
> Is this tuned configuration available somewhere? :-)
> More details on backend (and maybe details about RDBMS), linux 
> distribution, hardware would be great :-)
> 
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