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<title>RE: Windows version of Memcached</title>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>A bit of an abrupt end on the last email,
sorry.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The magic of distribution in memcached
happens in the client, when it hashes the keys and decides which server to
store/retrieve the value from, so the various servers do not even know about
each other. This also explains an important charateristic of memcached, no replication
of any kind, so if a server dies, all the data cached on it dies with it. It is
up to the client to handle this in a sensible manner. They handle it by adjsuting
what servers they map the different key hashes to, so the cached data is
gradually rebuilt.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Search the mailing list for ”consistent
hashing” and you’ll get some good discussions about this. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>- Tormod</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> </span></font><o:p></o:p></p>
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<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
memcached-bounces@lists.danga.com [mailto:memcached-bounces@lists.danga.com] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Tormod Hystad<br>
<b><span style='font-weight:bold'>Sent:</span></b> 30. september 2007 12:07<br>
<b><span style='font-weight:bold'>To:</span></b> Peter Chiu; memcached<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: Windows version of
Memcached</span></font><span lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Sure you can, no problem at all, just
install the memcached service on as many machines as you want and modify the
service on each machine as I described below (memory to use, port to listen on
and so on, see ”memcached.exe –h”).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Then access the servers from your code
with the client of your choice. From windows ”client” machines
we’ve used a java client (</span></font><font face=Arial><span
style='font-family:Arial'><a href="http://www.whalin.com/memcached/">http://www.whalin.com/memcached/</a></span></font><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>) and the Enyim C# (</span></font><font face=Arial><span
style='font-family:Arial'><a href="http://www.codeplex.com/EnyimMemcached/">http://www.codeplex.com/EnyimMemcached/</a>)
</span></font><font size=2 color=navy face=Arial><span style='font-size:10.0pt;
font-family:Arial;color:navy'>client with no problems and good performance
against the Win32 memcached, <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>- Tormod</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> </span></font><o:p></o:p></p>
</div>
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face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
Peter Chiu [mailto:peterchiu@jobsdb.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> 30. september 2007 12:03<br>
<b><span style='font-weight:bold'>To:</span></b> Tormod Hystad; memcached<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: Windows version of
Memcached</span></font><span lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Thanks Tormod. I
apologize for the confusion. He’s what I meant:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>The documentation at
<a href="http://www.danga.com/memcached/">http://www.danga.com/memcached/</a>
says, “First, you start up the memcached daemon on as many spare machines
as you have.” I was just wondering if I can do the same in the Windows
environment so as to provide load-balanced, distributed caching..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color="#1f497d" face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:#1F497D'>Best,</span></font><font
color="#1f497d"><span lang=EN-US style='color:#1F497D'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:#1F497D'>Peter</span></font><font
color="#1f497d"><span lang=EN-US style='color:#1F497D'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color="#1f497d" face="Times New Roman"><span
lang=EN-US style='font-size:12.0pt;color:#1F497D'> </span></font><font
size=2 color="#1f497d" face=Calibri><span lang=EN-US style='font-size:11.0pt;
font-family:Calibri;color:#1F497D'><o:p></o:p></span></font></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
Tormod Hystad [mailto:thy@komplett.no] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Sunday, September 30, 2007
5:48 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Peter Chiu; memcached<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: Windows version of
Memcached<o:p></o:p></span></font></p>
</div>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-US
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 color=navy
face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial;
color:navy'>I’m not exactly sure I understand your question, but if you
mean installing several memcached Win32 services on a single box on different
ports, I’ve not actually tried that, but I did figure out how to change
the port, memory and other settings for a service install, hope this gets you
in the right direction. :-)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>To install as a service
run “memcached.exe -d install”, documented at <a
href="http://jehiah.cz/projects/memcached-win32/"
title="http://jehiah.cz/projects/memcached-win32/">http://jehiah.cz/projects/memcached-win32/</a>
or see “memcached.exe –h” for help. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Then change the registry
settings for the memcached service, in HKEY_Local_Machine/System/CurrentControlSet/Services/
memcached Server. Change the ImagePath key to something like:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>"C:\servers\memcached-1.2.1-win32\memcached.exe"
-d runservice -p 11911 -l 192.168.xx.yyy -m 1024<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>And restart the service.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Those are my values, you should
use your own preferred path, ports, memory and ip-addresses, of course.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>- Tormod</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> </span></font><o:p></o:p></p>
</div>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>
<hr size=2 width="100%" align=center>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
memcached-bounces@lists.danga.com [mailto:memcached-bounces@lists.danga.com] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Peter Chiu<br>
<b><span style='font-weight:bold'>Sent:</span></b> 29. september 2007 20:53<br>
<b><span style='font-weight:bold'>To:</span></b> Robert Brewer; memcached<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: Windows version of
Memcached</span></font><span lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Great thanks!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>I couldn’t
find any instructions for setting up the Windows version with multiple
memcached servers. Could you please kindly share any pointers or info?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color="#1f497d" face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:#1F497D'>Best,</span></font><font
color="#1f497d"><span lang=EN-US style='color:#1F497D'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:#1F497D'>Peter</span></font><font
color="#1f497d"><span lang=EN-US style='color:#1F497D'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color="#1f497d" face="Times New Roman"><span
lang=EN-US style='font-size:12.0pt;color:#1F497D'> </span></font><font
size=2 color="#1f497d" face=Calibri><span lang=EN-US style='font-size:11.0pt;
font-family:Calibri;color:#1F497D'><o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
Robert Brewer [mailto:fumanchu@aminus.org] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Sunday, September 30, 2007
1:49 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Peter Chiu; memcached<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: Windows version of
Memcached<o:p></o:p></span></font></p>
</div>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-US
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p><font size=2 face="Times New Roman"><span lang=EN-US style='font-size:10.0pt'>Peter
Chiu wrote:<br>
> I am running Windows version of Memcached. I read somewhere that<br>
> ePoll/LibEvent will speed things up in Linux. Do I need them for<br>
> Windows?<br>
><br>
> Or is everything I need included in "memcached 1.2.1 for Win32<br>
> binaries (Dec 23, 2006)" from the following link?<br>
> <a href="http://jehiah.cz/projects/memcached-win32/">http://jehiah.cz/projects/memcached-win32/</a><br>
<br>
That binary worked for me. No other software needed.<br>
<br>
<br>
Robert Brewer<br>
fumanchu@aminus.org</span></font><span lang=EN-US> <o:p></o:p></span></p>
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