rndc reload and BIND9

[Miroslav Lachman]

Newcub Admin wrote:
> Simon wrote:
> 
>> Yes, reload is graceful, it will only load named.conf and new zones, it
>> will not touch preloaded zones. Having 2 masters makes no sense,
>> unless you are actually splitting the zone files between them. Unless
>> you perform a cold start of your bind, transfers only occur when a serial
>> number is updated (upon reload) or when a zone expires.
>>
>> -Simon
>>
>> On Wed, 6 Jul 2005 11:02:04 -0400 (EDT), John Von Essen wrote:
>>
>>  
>>
>>> Following a post I had about BIND9, I need to verify a certain behavior
>>> with BIND9 and issuing a rndc reload.
>>>
>>> Instead, of having a master and slave, I am going to have two 
>>> masters. One
>>> master is the real master, the other gets replicated via rsync. The main
>>> reason for this approach is to cut down on all the zone transfers (we
>>> have 12,000 domains).
>>>
>>> After every hourly rsync, I will issue a rndc reload. If anything has
>>> changed, named will see it with the new serial number. Does the reload
>>> keep dns functionality up and running while it performs the reload?
>>>
>>> A pure stop and start will take about 55 seconds, which isn't acceptable
>>> every hour. But if the reload (which appears to take 10 seconds) is
>>> gracefull and keep existing functionality intact while it reloads, then
>>> that would be great. Just need to verify.
>>>
>>> Thanks
>>> John
>>> _______________________________________________
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>>>
>>>   
>>
>>
>>
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>>
>>  
>>
> Have you considered using powerdns www.powerdns.com. It uses MySQL for a 
> backend, so there are no config files to maintain, and you can easily 
> replicate the database to distribute the load.
> 
> I can't yet testify to its ability to withstand a heavy loads, because I 
> have not put it in production. So far in my testing, it is working 
> flawlessly.
> 
> Rob Harrington
> KCnet

I think, MySQL is not good backend for heavy loaded DNS, but if you 
want, you can use it with BIND too.

http://bind-dlz.sourceforge.net/perf_tests.html

-- 
Miroslav Lachman
Webapplication Developer