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Date: Sun, 23 Apr 2017 02:42:31 +0000
From: Stefan Sedich <stefan.sedich@...il.com>
To: musl@...ts.openwall.com
Subject: Re: Re: [PATCH v2] attempts option not being respected in resolv.conf
Thanks Rich,
I will mull over this and play around with glibc a bit more to see if I can
come up with something that gives us that ideal middle ground, I do agree
with your initial idea though it sounds like it could behave a little bit
closer to glibc but I will dig more and see.
Stefan
On Sat, Apr 22, 2017 at 3:32 PM Rich Felker <dalias@...c.org> wrote:
> On Tue, Apr 04, 2017 at 02:08:08AM +0000, Stefan Sedich wrote:
> > One thing I have found though is that the way the retry logic works if I
> > want to retry ever 1 second for a total of 5 times I need to set it to
> > 'options timeout:5 attempts:5', not sure if someone who knows this area
> > well can comment but it appears to create a retry_interval based on
> > timeout/attempts, which as far as I understand it is different to how it
> > works with glibc where I can set timeout:1 attempts:5 and it does as I
> > expect.
>
> The man page documents timeout as "amount of time the resolver will
> wait for a response from a remote name server before retrying the
> query via a different name server". Since musl does not cycle through
> servers, but tries them all concurrently, this definition does not
> make sense, so we have to find a reasonable way to interpret the
> options, but I agree it might be "wrong" right now. It might be that,
> rather than retry_interval being timeout/attempts, retry_interval
> should be timeout, and the total timeout should be timeout*attempts.
> We really should look at the glibc behavior and see how it scales with
> different settings and numbers of nameservers and try to make the
> behavior somehow comparable.
>
> BTW sorry I missed your V2.
>
> Rich
>
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