[nsd-users] nsdc notify should process in parallel

[Matthijs Mekking]

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Hi Paul,

You are right that nsd-notify handles notifies sequentially and that
this delay can occur in specific situation.

However, note that NSD 3.x.x sends notifies automatically, implemented
non-sequentially. Also note that nsd-notify is deprecated since 3.x.x
and it is only still there because it is a useful aiding tool.

Best regards,

Matthijs

Paul Wouters wrote:
> 
> Hi,
> 
> If you have many zones, and you have a few zones with a broken/bad
> nameserver,
> then the notify process stalls using exponential backof, delaying all other
> zones sequentially as well. Example:
> 
> [root at vault nsd]# nsdc notify
> Sending notify to slave servers...
> [1269815681] nsd-notify[22093]: warning: timeout (1 s) expired, retry
> notify to 193.110.157.23.
> [1269815683] nsd-notify[22093]: warning: timeout (2 s) expired, retry
> notify to 193.110.157.23.
> [1269815687] nsd-notify[22093]: warning: timeout (4 s) expired, retry
> notify to 193.110.157.23.
> [1269815695] nsd-notify[22093]: warning: timeout (8 s) expired, retry
> notify to 193.110.157.23.
> [1269815711] nsd-notify[22093]: warning: timeout (16 s) expired, retry
> notify to 193.110.157.23.
> [1269815743] nsd-notify[22093]: warning: error: failed to send notify to
> 193.110.157.23.
> [1269815744] nsd-notify[22116]: warning: timeout (1 s) expired, retry
> notify to 193.110.157.23.
> [1269815746] nsd-notify[22116]: warning: timeout (2 s) expired, retry
> notify to 193.110.157.23.
> [1269815750] nsd-notify[22116]: warning: timeout (4 s) expired, retry
> notify to 193.110.157.23.
> [1269815758] nsd-notify[22116]: warning: timeout (8 s) expired, retry
> notify to 193.110.157.23.
> [1269815774] nsd-notify[22116]: warning: timeout (16 s) expired, retry
> notify to 193.110.157.23.
> [1269815806] nsd-notify[22116]: warning: error: failed to send notify to
> 193.110.157.23.
> 
> [ many more times repeated ]
> 
> The real fix I guess is to process zones parallel instead of serial.
> 
> Paul
> _______________________________________________
> nsd-users mailing list
> nsd-users at NLnetLabs.nl
> http://open.nlnetlabs.nl/mailman/listinfo/nsd-users

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