Date: Sat, 22 Apr 2017 18:32:19 -0400 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: Re: [PATCH v2] attempts option not being respected in resolv.conf 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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