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From Dave <snoopd...@gmail.com>
Subject Re: clustering Roller 4.0 - checklist
Date Fri, 01 Aug 2008 05:14:54 GMT
On Thu, Jul 31, 2008 at 5:53 PM, Dick Davies <sisred@cf.ac.uk> wrote:
> On Thu, Jul 31, 2008 at 6:36 PM, Allen Gilliland
> <Allen.Gilliland@sun.com> wrote:
>
>> Dave wrote:
>>>
>>> On Wed, Jul 30, 2008 at 6:05 AM, Dick Davies <rasputnik@gmail.com> wrote:
>
>>>> * turn off search
>>>> * have a shared uploads folder
>>>> * shared planet cache.dir directory
>>>> * arrange for each instance to have a unique tasks.clientId attribute in
roller-custom.properties
>
>> You also need some form of cluster safe cache implementation as well unless
>> you plan to disable all of Roller's caches.  Without that you'll get
>> mismatching data between nodes.
>
> Hmm, that's a bit of a gotcha :)
> Might explain some weirdness we've been seeing though, thanks for the warning.

There is a memcached implementation of the Roller cache system at
roller.dev.java.net. Here's a HOWTO that explains how to use it:

    http://rollerweblogger.org/roller/entry/howto_memcached_with_roller

- Dave

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