Zone transfers locking up DNS

Snoopy snoopy at greenapple.com
Wed Oct 1 02:27:18 UTC 2003


I think you can try to do an 'incremental' transfer instead of a full
transfer each time....


"Gary Algier" <gaa at ulticom.com> wrote in message
news:blchn1$2all$1 at sf1.isc.org...
> Hi,
>
> I am using a well known email blacklist service.  It is implemented with
zone
> transfers.  When the transfer happens it takes about 5 minutes.   While
> this is going on, all other DNS queries stop.  And yes, I have built the
> threaded version of bind (9.2.2 btw).  It does not always stop everything,
> but it sure seems to often enough.  It seems as if one thread handles the
> zone transfer and if nobody asks for any information from the given zone
> we will be ok, but once a thread tries to handle a request from that zone,
> that thread gets stuck.
>
> Does anyone have a solution?  Is there any way to make the zone transfers
> happen "offline"?  I don't need them to be absolutely up to date.  I _do_
> need to be able to satisfy other DNS queries.
>
> (I thought of limiting the transfer times, but the granularity is too
large.
> I would need to limit it to only a few seconds and the unit is 1 minute.)
>
> -- 
> Gary Algier, WB2FWZ          gaa at ulticom.com             +1 856 787
2758
> Ulticom Inc., 1020 Briggs Rd, Mt. Laurel, NJ 08054      Fax:+1 856 866
2033
>
> Nielsen's First Law of Computer Manuals:
>      People don't read documentation voluntarily.
>
>



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