<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;">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><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">----- 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><div>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 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></div></div><br></div></div><br>
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