[OpenAFS] Improving AFS performance for Joomla and other web sites
Edgecombe, Jason
jwedgeco@uncc.edu
Wed, 8 Sep 2010 17:32:43 -0400
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Hi everyone,
=20
We currently server our entire web tree out of AFS. This includes Joomla
and other PHP-based applications. While I was benchmarking our new
server, I noticed that the following rough performance numbers:
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Static files served from AFS:
~200 requests per second
Joomla home page served out of AFS: ~30 requests per
second
Joomla home page served from local ext3: 1000 requests per
second.
=20
I'm running a 8 cores with hyperthreading (16 threads). I'm running the
Apache threaded worker MPM on RHEL5.5 with mod_fcgid and OpenAFS
1.4.12.1. I have Apache configured for ~1000 threads.
=20
My data (250GB) and stat cache for the AFS client should be big enough
to not have to hit the server.
=20
My afsd has the following options: " -fakestat -dynroot -chunksize 18
-stat 500000 -daemons 32 -volumes 2000 -blocks 212713128"
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What is recommended to improve my AFS performance for Joomla?
=20
FYI, my measurements show that the "stat" system call is run more than
any other.
=20
Thanks,
Jason
=20
------------------------------------------------------------------------
---
Jason Edgecombe | Linux and Solaris Administrator
UNC Charlotte | The William States Lee College of Engineering
9201 University City Blvd. | Charlotte, NC 28223-0001
jwedgeco@uncc.edu <mailto:jwedgeco@uncc.edu> | http://www.coe.uncc.edu
<http://www.coe.uncc.edu/>=20
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by telephone at 704-687-3514. Thank you.
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<p class=3DMsoNormal>Hi everyone,<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>We currently server our entire web tree out of AFS. =
This
includes Joomla and other PHP-based applications. While I was =
benchmarking our
new server, I noticed that the following rough performance =
numbers:<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Static files served from AFS: =
&=
nbsp; =
&=
nbsp; ~200
requests per second<o:p></o:p></p>
<p class=3DMsoNormal>Joomla home page served out of AFS: =
&=
nbsp; ~30
requests per second<o:p></o:p></p>
<p class=3DMsoNormal>Joomla home page served from local ext3: =
1000
requests per second.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>I’m running a 8 cores with hyperthreading (16 =
threads).
I’m running the Apache threaded worker MPM on RHEL5.5 with =
mod_fcgid and
OpenAFS 1.4.12.1. I have Apache configured for ~1000 =
threads.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>My data (250GB) and stat cache for the AFS client =
should be
big enough to not have to hit the server.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>My afsd has the following options: “ =
-fakestat
-dynroot -chunksize 18 -stat 500000 -daemons 32 -volumes 2000 -blocks =
212713128”<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>What is recommended to improve my AFS performance =
for
Joomla?<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>FYI, my measurements show that the =
“stat” system
call is run more than any other.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Thanks,<o:p></o:p></p>
<p class=3DMsoNormal>Jason<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Arial","sans-serif"'>--------------=
-------------------------------------------------------------<o:p></o:p><=
/span></p>
<p class=3DMsoNormal style=3D'text-autospace:none'><span =
style=3D'font-size:9.0pt;
font-family:"Arial","sans-serif"'>Jason Edgecombe <b>| </b>Linux and =
Solaris
Administrator<o:p></o:p></span></p>
<p class=3DMsoNormal style=3D'text-autospace:none'><span =
style=3D'font-size:9.0pt;
font-family:"Arial","sans-serif"'>UNC Charlotte <b>| </b>The William =
States Lee
College of Engineering<o:p></o:p></span></p>
<p class=3DMsoNormal style=3D'text-autospace:none'><span =
style=3D'font-size:9.0pt;
font-family:"Arial","sans-serif"'>9201 University City Blvd. <b>| =
</b>Charlotte,
NC 28223-0001<o:p></o:p></span></p>
<p class=3DMsoNormal style=3D'text-autospace:none'><span =
style=3D'font-size:9.0pt;
font-family:"Arial","sans-serif"'><a =
href=3D"mailto:jwedgeco@uncc.edu"><span
style=3D'color:windowtext'>jwedgeco@uncc.edu</span></a> <b>| </b><a
href=3D"http://www.coe.uncc.edu/"><span =
style=3D'color:blue'>http://www.coe.uncc.edu</span></a><o:p></o:p></span>=
</p>
<p class=3DMsoNormal style=3D'text-autospace:none'><span =
style=3D'font-size:9.0pt;
font-family:"Arial","sans-serif"'>---------------------------------------=
------------------------------------<o:p></o:p></span></p>
<p class=3DMsoNormal style=3D'text-autospace:none'><span =
style=3D'font-size:8.0pt;
font-family:"Arial","sans-serif"'>If you are not the intended recipient =
of this
transmission or a person responsible for delivering it to the intended
recipient, any disclosure, copying, distribution, or other use of any of =
the
information in this transmission is strictly prohibited. If you have =
received
this transmission in error, please notify me immediately by reply e-mail =
or by
telephone at 704-687-3514. Thank you.<o:p></o:p></span></p>
<p class=3DMsoNormal><o:p> </o:p></p>
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