Re: dns_timeout and dns_retransmit_interval in ms

On 13/03/11 10:00, Tsantilas Christos wrote:
> Convert dns_timeout and dns_retransmit_interval configuration options to
> use millisecond resolution.
>
> One second resolution is too coarse for small timeouts in
> delay-sensitive environments, especially when a retransmit, bypass, or
> another corrective action is available and is likely to produce a
> positive outcome. In DNS world specifically, most timeouts are measured
> in milliseconds.
>
>
> NOTE: This patch add a new cf.data.pre type the time_msec which is a
> uint64_t. I found more practical to use an integer to store miliseconds,
> but using the timeval type may has advandages too.
>
>
> This is a Measurement Factory project

+1.

I will also propose a related change. Reducing the dns_timeout to 5
seconds default.

The existing state of several 2 minute dns_timeout expecting to be
finished within a 1 minute connect_timeout is leading to connection
problems on some systems where IPv6 times out but IPv4 is perfectly usable.

Amos

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