rndc reconfig delays

[Larissa Shapiro]

Probably. I'd like to get Michael's feedback... I have not heard of  
this from anyone else.... have either of you?

On Aug 26, 2010, at 3:22 PM, Rob Foehl wrote:

> I've been experimenting with loading a large number of master zones  
> (on the order of 250,000) in a single BIND instance, and have  
> noticed that 'rndc reconfig' with this many zones loaded can take a  
> very long time to determine that it has little or nothing to do.   
> Worse, the server stops answering other requests for the duration,  
> in both threaded and non-threaded builds -- I'm testing with 64 bit  
> builds of both 9.7.0-P1 and 9.7.1-P2.
>
> In the best case, a reconfig will take about 40 seconds to complete,  
> and stalls the server for most of that time.  Loading zones in bulk  
> is substantially slower, but is less of an issue for the intended  
> use, and is more or less limited by the speed of the storage.
>
> My next step is going to be to experiment with the rndc addzone/ 
> delzone feature in the 9.7.2 betas, which hopefully should avoid any  
> need to attempt a reconfig during normal use.  That aside, is there  
> anything else I could be doing to speed things up?
>
> -Rob
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