On Thu, Apr 29, 2010 at 03:19:22PM -0500, Shawn Walker wrote:
> On 04/29/10 01:17 PM, [email protected] wrote:
> > The stats engine accounts for connection time as a separate value.
> > Have you verified that these changes still lead to appropriate
> > repository selection when faced with a large number of mirrors and
> > origins?
>
> I don't quite follow; before we only called record_connection() if
> conn_count > 0 and conn_time > 0 and that behaviour is unchanged for
> http(s).
>
> The only difference here really is that for some protocols,
> conn_time could be 0 (such as file), so a "connection" is just
> accessing the material.
The following comment implies that you've changed how the throughput
calculation is performed. I was curious if you've been able to verify
that this doesn't change the quality results in unexpected ways.
# Only performing this subtraction when the
# conn_time is 0 allows the first request in
# the pipeline to properly include connection
# time, etc. to initiate the transfer.
> But as far as I can tell, the repository selection behaviour is
> still intact when multiple mirrors or origins are present although
> I've only tested with a few, not "large numbers" (not even sure how
> I would do that given there aren't many available). And yes, I've
> looked at what happens when you mix 'http' and 'file' as well --
> file is generally almost exclusively used and either gets a slightly
> higher quality number of a significantly higher one depending on the
> operation.
>
> If there's a specific sort of test you're looking for, I can run
> that if you tell me what it is.
There are about 5 mirrors on SWAN and about 3 origins. I'll send you
the instructions I used to test this in a separate e-mail. You'll need
to verify that you're getting the results that you expect. You may also
want to run this test on a machine on SWAN in sfbay and verify that the
results look right for that setup too.
Thanks,
-j
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