[one-users] Sunstone redundant memcached setup

[Thibault Galko]

Hi,

Memcached does not support redundancy at server side, and
Rack::Memcached does not support it either as PHP memcached client does.

I've implemented a patch to use Redis as replacement for memcached
Session using Rack:Redis in order to setup a true session failover with
Redis Replication in a Front-End Cluster.

We plan to release it to the community, but you could contact me if you
need it asap.

Best Regards, 

Sorry for my english .. 

-- 

Thibault GALKO 

		 [6]

+33 (0)1 40 93 58 63
thibault.galko at bosstek.fr 

BOSSTEK - 150, Avenue de Verdun - 92320 Châtillon 

2013/11/14 Javier Fontan <jfontan at opennebula.org>

> I've been checking the API of Rack sessions put I don't find a way to
> do what you are proposing. I'll come back to this after I finish with
> some bugs I have in my backlog.
> 
> On Wed, Nov 13, 2013 at 10:33 AM, Stefan Kooman <stefan at bit.nl> wrote:
>> Hi List,
>>
>> If you have a setup consisting of more than one "front-end" server I
>> think it would make sense to be able to specify more than one memcached
>> server in sunstone. If for one reason or another a memcached server is
>> not available anymore it can automatically try the next one configured
>> (after $timeout value). Building this funtionality directly into
>> sunstone gives you the benefit of "redundant" memcached servers without
>> the need for cluster software taking care of this. If you let sunstone
>> server A point to memcached server A (primary) and memached server B
>> (secondary) and sunstone server B point to memcached server B (primary)
>> and memcached server A (secondary) you've doubled the available
>> memcached capacity during normal operations.
>>
>> Are there any reasons _not_ to use two different (active) memcached
>> servers?
>>
>> Cheers,
>>
>> Stefan
>>
>>
>> --
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> 
> --
> Javier Fontán Muiños
> Developer
> OpenNebula - The Open Source Toolkit for Data Center Virtualization
> www.OpenNebula.org [4] | @OpenNebula | github.com/jfontan [5]
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