<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">Sorry, this was for my employer (<a href="http://www.reardencommerce.com">Rearden Commerce</a>) and I can only discuss the high-level details. Since its not pertinent to others here, I'd be happy to talk off the list. <br><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">----- Original Message ----<br>From: Thomas Wilsher <twilsher@visiblepath.com><br>To: Ben Manes <ben_manes@yahoo.com>; Matt Ingenthron <Matt.Ingenthron@Sun.COM>; Marcus Bointon <marcus@synchromedia.co.uk><br>Cc: Memcached list <memcached@lists.danga.com><br>Sent: Tuesday, September 4, 2007 3:57:02 PM<br>Subject: RE: memcached replication<br><br><title>RE: memcached
replication</title>
<p><font size="2">Ben,<br>
<br>
Any chance of this code being made available as open source?<br>
<br>
--Thomas<br>
<br>
<br>
-----Original Message-----<br>
From: memcached-bounces@lists.danga.com on behalf of Ben Manes<br>
Sent: Fri 8/31/2007 4:12 PM<br>
To: Matt Ingenthron; Marcus Bointon<br>
Cc: Memcached list<br>
Subject: Re: memcached replication<br>
<br>
I just finished rewriting our caching layer, and this is exactly what we did - ehcache backed by memcached. When invalidation occurs, the remote cache is rewarmed and a JMS message is broadcasted for all servers to refresh their caches. There's a lot more whiz-bang features, of course, and it performs pretty darn well. It takes about 5-10 minutes to convert a new cache based on ehcache over to one that is also backed by memcached and participates in all the cache management flows.<br>
<br>
----- Original Message ----<br>
From: Matt Ingenthron <Matt.Ingenthron@Sun.COM><br>
To: Marcus Bointon <marcus@synchromedia.co.uk><br>
Cc: Memcached list <memcached@lists.danga.com><br>
Sent: Tuesday, August 28, 2007 10:31:28 PM<br>
Subject: Re: memcached replication<br>
<br>
Marcus Bointon wrote:<br>
> On 29 Aug 2007, at 00:37, Dustin Sallings wrote:<br>
><br>
>> My goal is not replication, but to allow for a sort of L1 cache in an<br>
>> application with memcached as an L2 and cache invalidation service.<br>
><br>
> That's a really nice idea. I've seen something vaguely similar with<br>
> jgroups, but it lacks the best bits of both memcache and in-process<br>
> caches (I'm also using APC with PHP). I can see that being a very<br>
> efficient system.<br>
<br>
That's also what ehCache does (in process cache, with remote L2 cache)<br>
for Java applications.<br>
<br>
I've looked at it a bit and talked with Greg Luck about it (the night he<br>
released his "benchmark" between ehCache and memcached). The<br>
"benchmark" shows an impressive chart but leaves out the details you<br>
really need to understand what's going on-- looks like his blog filled<br>
in the details.<br>
<br>
Personally, I see room for both approaches. From discussions with<br>
others, there are times you just want an app to minimize local memory<br>
usage. Plus, in talking with Greg, he specifically plans in most cases<br>
to have a cache that overflows OS page buffer, which tells you it's<br>
typically deployed in a different way than memcached. That doesn't<br>
negate the fact that sometimes a well managed, in-process cache would be<br>
an advantage.<br>
<br>
- Matt<br>
<br>
--<br>
Matt Ingenthron - Web Infrastructure Solutions Architect<br>
Sun Microsystems, Inc. - Global Systems Practice<br>
<a rel="nofollow" target="_blank" href="http://blogs.sun.com/mingenthron/">http://blogs.sun.com/mingenthron/</a><br>
email: matt.ingenthron@sun.com Phone: 310-242-6439<br>
<br>
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<br>
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