[knot-dns-users] Bootstrapping lots of slave zones

Hello Knot developers, I configured an instance of Knot 1.2.0rc3 with 5174 slave zones, and started it. I wanted to see how long it would take to transfer all the zones in. It has been running for about an hour, and it still hasn't managed to load all the zones from its master. I'll pick just one zone as an example to show how long it took: # grep apnic.net /var/log/knot/knot.log 2013-03-09T00:50:19.361489-00:00 Will attempt to bootstrap zone apnic.net. from AXFR master in 37s. 2013-03-09T01:06:31.330875-00:00 Will attempt to bootstrap zone apnic.net. from AXFR master in 35s. 2013-03-09T01:16:19.741644-00:00 Incoming AXFR transfer of 'apnic.net.' with '193.0.0.198@53' key 'ripencc-20110222.': Started. 2013-03-09T01:16:35.282203-00:00 Will attempt to bootstrap zone apnic.net. from AXFR master in 52s. 2013-03-09T01:52:16.477212-00:00 Will attempt to bootstrap zone apnic.net. from AXFR master in 37s. 2013-03-09T01:56:02.806828-00:00 Will attempt to bootstrap zone apnic.net. from AXFR master in 13s. 2013-03-09T01:57:00.901518-00:00 Incoming AXFR transfer of 'apnic.net.' with '193.0.0.198@53' key 'ripencc-20110222.': Started. 2013-03-09T01:57:01.096493-00:00 Incoming AXFR transfer of 'apnic.net.' with '193.0.0.198@53' key 'ripencc-20110222.': Finished. it actually transferred the zone in, it took 67 minutes! All that while, it was responsing with SERVFAIL for the zone. While the zone "apnic.net" has now been loaded, Knot is still busy loading many of the other zones. I can't tell how far it is. Perhaps there could be a command for knotc, called "zonestatus" which would print out a list of all configured zone, and their statuses. I understand that transferring in lots of zones takes time. However, if I start an instance of BIND with the same slave zones, it can transfer them all in within about 15-20 minutes. Knot appears to be much slower in comparison. Do you have any suggestions for speeding things up? Regards, Anand