Open Stack

Hello everyone,

I have bumped into an article from one of the memcached creators where 
he discuss the use of memcached to store session data:

http://dormando.livejournal.com/495593.html

Maybe we need to take it into consideration. Maybe it'll bring more 
problems than solutions for a future, scallable HA environment.


Best regards,

On 24-10-2014 17:10, Gabriel Hurley wrote:
> SQLite doesn't introduce any additional dependencies, memcached requires installation of memcached (admittedly it's not hard on most distros, but it *is* yet another step) and in most cases the installation of another python module to interface with it.
>
> Memcached might be a good choice for devstack, but it may or may not be the right thing to recommend for Horizon by default.
>
>      - Gabriel
>
> -----Original Message-----
> From: Yves-Gwenaël Bourhis [mailto:yves-gwenael.bourhis at cloudwatt.com]
> Sent: Friday, October 24, 2014 7:06 AM
> To: openstack-dev at lists.openstack.org
> Subject: Re: [openstack-dev] [Horizon] [Devstack]
>
> Le 24/10/2014 13:30, Chmouel Boudjnah a écrit :
>> On Fri, Oct 24, 2014 at 12:27 PM, Yves-Gwenaël Bourhis
>> <yves-gwenael.bourhis at cloudwatt.com
>> <mailto:yves-gwenael.bourhis at cloudwatt.com>> wrote:
>>      memcache can be distributed (so usable in HA) and has far better
>>      performances then db sessions.
>>      Why not use memcache by default?
>>
>>
>> I guess for the simple reason that if you restart your memcache you
>> loose all the sessions?
> Indeed, and for devstack that's an easy way do do a cleanup of old sessions :-)
>
> We are well talking about devstack in this thread, where loosing sessions after a memcache restart is not an issue and looks more like a very handy feature.
>
> For production it's another mater, and operators have the choice.
>
> --
> Yves-Gwenaël Bourhis
>
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-- 
Thiago Paiva Brito
Software Engineer
Advanced OpenStack Brazil Team