Using the OTP 'rpc' service (rex) under high load, was: Re: Load balancing/multiplexing rpc calls amongst Erlang Nodes - Erlang Programming

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Message from discussion Using the OTP 'rpc' service (rex) under high load, was: Re: Load balancing/multiplexing rpc calls amongst Erlang Nodes
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Date: Wed, 24 Oct 2012 09:24:51 +0300
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From: Joshua Muzaaya <joshm...@gmail.com>
To: Scott Lystig Fritchie <fritc...@snookles.com>
Cc: erlang-questi...@erlang.org
Subject: Re: [erlang-questions] Using the OTP 'rpc' service (rex) under high
 load, was: Re:  Load balancing/multiplexing rpc calls amongst Erlang Nodes
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indeed, this so helpful of you. You have saved me alot of problems. I was
experiencing the same and thought that i was doing things the wrong way.
Thank you so much.

  <http://www.linkedin.com/pub/muzaaya-joshua/39/2ba/202>
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On Wed, Oct 24, 2012 at 7:33 AM, Scott Lystig Fritchie <
fritc...@snookles.com> wrote:

> Hi, Joshua.  One note of caution about the rpc service, or more
> specifically about the 'rex' gen_server that implements the server side
> of the client/server remote execution service.
>
> The 'rex' process is a single OTP gen_server and thus can use at most a
> single CPU core's worth of computation resource.  Experience with using
> rpc/rex with Riak has shown that certain workloads can easily overwhelm
> the rex server's ability to quickly execute requests from remote
> clients.  When possible, I'd recommend avoiding using the 'rpc' module
> and bypass 'rex' by spawn()/spawn_monitor()/spawn_link()'ing worker
> processes directly on a remote node.
>
> -Scott
>



-- 
*Muzaaya Joshua
Systems Engineer
+256774115170*
*"Through it all, i have learned to trust in Jesus. To depend upon His Word"
*

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indeed, this so helpful of you. You have saved me alot of problems. I was e=
xperiencing the same and thought that i was doing things the wrong way. Tha=
nk you so much.<br><br><div id=3D"WISESTAMP_SIG_9901"><div style=3D"font-si=
ze:13.3px;font-family:Verdana,Arial,Helvetica,sans-serif">
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/www.linkedin.com/pub/muzaaya-joshua/39/2ba/202" target=3D"_blank">						<i=
mg src=3D"https://s3.amazonaws.com/images.wisestamp.com/apps/buttons/linked=
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<div style=3D"border-top:1px solid #eeeeee;margin-top:17px;padding-top:2px;=
font-size:75%"><a style=3D"color:#6f6f6f;text-decoration:none" href=3D"http=
://r1.wisestamp.com/r/landing?u=3Dcf16262215eb8784&amp;v=3D3.11.21&amp;t=3D=
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ail-install%3Futm_source%3Dextension%26utm_medium%3Demail%26utm_campaign%3D=
promo_10"><span style=3D"color:#6f6f6f">Designed with WiseStamp - </span></=
a><a style=3D"color:#3f48cc;text-decoration:underline" href=3D"http://r1.wi=
sestamp.com/r/landing?u=3Dcf16262215eb8784&amp;v=3D3.11.21&amp;t=3D13510598=
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all%3Futm_source%3Dextension%26utm_medium%3Demail%26utm_campaign%3Dpromo_10=
"><span style=3D"color:#3f48cc">Get yours</span></a>=A0<img src=3D"http://s=
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1.21&amp;t=3D1351059836769&amp;promo=3D10" width=3D"1" height=3D"1"></div>
<img src=3D"https://wisestamp.appspot.com/pixel.png?p=3Dmozilla&amp;v=3D3.1=
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1"></div></div><br><br><div class=3D"gmail_quote">On Wed, Oct 24, 2012 at 7=
:33 AM, Scott Lystig Fritchie <span dir=3D"ltr">&lt;<a href=3D"mailto:fritc=
h...@snookles.com" target=3D"_blank">fritc...@snookles.com</a>&gt;</span> wr=
ote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Hi, Joshua. =A0One note of caution about the=
 rpc service, or more<br>
specifically about the &#39;rex&#39; gen_server that implements the server =
side<br>
of the client/server remote execution service.<br>
<br>
The &#39;rex&#39; process is a single OTP gen_server and thus can use at mo=
st a<br>
single CPU core&#39;s worth of computation resource. =A0Experience with usi=
ng<br>
rpc/rex with Riak has shown that certain workloads can easily overwhelm<br>
the rex server&#39;s ability to quickly execute requests from remote<br>
clients. =A0When possible, I&#39;d recommend avoiding using the &#39;rpc&#3=
9; module<br>
and bypass &#39;rex&#39; by spawn()/spawn_monitor()/spawn_link()&#39;ing wo=
rker<br>
processes directly on a remote node.<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
-Scott<br>
</font></span></blockquote></div><br><br clear=3D"all"><br>-- <br>*Muzaaya =
Joshua<br>Systems Engineer<br>+256774115170*<br>*&quot;Through it all, i ha=
ve learned to trust in Jesus. To depend upon His Word&quot;<br>*<br><br>
<br><br>

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