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From: Leif Hedstrom <zwoop@apache.org>
Subject: Re: Curious about proxy.config.remap.num_remap_threads
Date: Sat, 23 Nov 2013 11:41:15 -0700
To: Mark Moseley <moseleymark@gmail.com>


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> On Nov 23, 2013, at 12:13 AM, Mark Moseley <moseleymark@gmail.com> wrote:
>=20
>> On Fri, Nov 22, 2013 at 7:51 PM, Leif Hedstrom <zwoop@apache.org> wrote:
>>=20
>> On Nov 22, 2013, at 11:18 AM, Mark Moseley <moseleymark@gmail.com> wrote:=

>>=20
>> > I'm looking to deploy ATS in a very busy, remap-heavy reverse proxy env=
ironment. I'll be using a handful of lines of Lua to remap based on an incom=
ing header.
>> >
>> > The new proxy.config.remap.num_remap_threads option sounds like it'd be=
 pretty important to set for such a scenario.
>> >
>> > Could the devs chime in on what would be an appropriate # for this sett=
ing?
>> >
>> > Should 1 suffice? Should it be equal to # of cores? Or something much h=
igher?
>>=20
>>=20
>> The only use case I think think of for the remap threads feature is if yo=
u have a plugin that can block a thread. With block, I mean, not yield it in=
 some reasonable amount of milliseconds. For now, if you use this remap thre=
ads processor, you also have to turn off the per thread sharing of sessions,=
 and switch to a single global session pool.
>=20
>=20
> Ok, so it sounds like if something isn't blocking, then there's no need to=
 set it at all then. My Lua code is just doing some munging on the original d=
estination IP, so should never block. Sound right?=20

Right.

-- Leif=20=

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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><br></div><div><br>On Nov 23, 2013, at 12:13 AM, Mark Moseley &lt;<a href="mailto:moseleymark@gmail.com">moseleymark@gmail.com</a>&gt; wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">On Fri, Nov 22, 2013 at 7:51 PM, Leif Hedstrom <span dir="ltr">&lt;<a href="mailto:zwoop@apache.org" target="_blank">zwoop@apache.org</a>&gt;</span> wrote:<br><div class="gmail_extra"><div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5"><br>
On Nov 22, 2013, at 11:18 AM, Mark Moseley &lt;<a href="mailto:moseleymark@gmail.com">moseleymark@gmail.com</a>&gt; wrote:<br>
<br>
&gt; I'm looking to deploy ATS in a very busy, remap-heavy reverse proxy environment. I'll be using a handful of lines of Lua to remap based on an incoming header.<br>
&gt;<br>
&gt; The new proxy.config.remap.num_remap_threads option sounds like it'd be pretty important to set for such a scenario.<br>
&gt;<br>
&gt; Could the devs chime in on what would be an appropriate # for this setting?<br>
&gt;<br>
&gt; Should 1 suffice? Should it be equal to # of cores? Or something much higher?<br>
<br>
<br>
</div></div>The only use case I think think of for the remap threads feature is if you have a plugin that can block a thread. With block, I mean, not yield it in some reasonable amount of milliseconds. For now, if you use this remap threads processor, you also have to turn off the per thread sharing of sessions, and switch to a single global session pool.<br>

<span class="HOEnZb"></span></blockquote><div><br><br></div><div>Ok, so it sounds like if something isn't blocking, then there's no need to set it at all then. My Lua code is just doing some munging on the original destination IP, so should never block. Sound right? <br>
</div></div></div></div>
</div></blockquote><br><div>Right.</div><div><br></div><div>-- Leif&nbsp;</div></body></html>
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