[Kolab-devel] redis vs. MongoDB for zpush kolab backend

[Bogomil Shopov]

On Friday, January 07, 2011 03:44:25 pm Gunnar Wrobel wrote:
> Hi Bogo,
> 
> Zitat von Bogomil Shopov <shopov at kolabsys.com>:
> > Hi all,
> > I am actively testing MongoDB + PHP driver on my machine right now and I
> > am getting better results than Redis.
> 
> Sounds good.
> 
> > In fact MongoDB is what we need:
> I wonder if this is really so much a question of the backend
> technology. I admit I don't have much experience with something like
> MongoDB but my assumption is that there are different technologies
> around that provide the same feature set. Do we really need to choose
> a single one?

redis is not working at all, just ignore it. But you are right. I am thinking 
also to create a different layer for that and user can choose what to use.

> 
> I looked at the code you added in the "backend-mongodb" branch and so
> far this is a key-value store. That is something you get from many
> backend technologies and in fact the interface for such services is
> near to trivial. It boils down to what you established in
> mongoDBcache.php.
> 
> "backend-redis" wasn't very different concerning the interface. So I
> would suggest to complete the abstraction at that point and really
> rely on a simple interface. In the long term you'll be able to switch
> to any newer technology that suites your needs better than what might
> perform best right now.
> 
> Of course there are already interfaces like that around. Horde_Cache
> is one of them (it abstracts about 10 key-value storage backend
> types). And in fact I'd be very happy if we could keep such code
> segments together.
> 
> I much rather convert your code into modules to Horde_Cache and add
> support for both Redis and MongoDB there (both are missing from
> Horde_Cache at the moment).
> 
> What is the advantage of keeping such code consolidated: We can use
> the same caching backend for other applications as well. Did you know
> that we use the db functions Alain used initially in the Kolab
> free/busy code as well?
> 
> You obviously found them to be too slow for our needs. If Redis and/or
> MongoDB is a better solution I'd like to use it for other systems as
> well.
> 
> Does any of this make sense to you and would that be a direction you'd
> be willing to go into?
> 
> > - We can make queries (it's usefull for Calendar)
> > - We can create indexes on whatever we want
> > - We can use authentication (salt+md5) (with Redis we don't (we should
> > use "trusted environment"));
> > - There are more than 10 language drivers
> > (http://www.mongodb.org/display/DOCS/Drivers) - we can access the
> > data in more
> > than 10 languages
> 
> I'm aware that many of these are features that are not part of the
> simple key-value interface I mentioned above. But that doesn't change
> the fact that the key-value aspect is part of what is required. All
> other parts can be handled separately from that.
> 
> Cheers,
> 
> Gunnar
> 
> > I have tried xCache (lighttpd project) under PHP, but it does almost the
> > same like current DB and it's not so good for real chaching, but for
> > opcode optimization.
> > 
> > 
> > 
> > --
> > Bogomil "Bogo" Shopov
> > Senior Web Engineer
> > 
> > 
> > Kolab Systems AG
> > Zürich, Switzerland
> > 
> > e: shopov at kolabsys.com
> > t: +41 43 5016691 (ext. 2115 649)
> > w: http://kolabsys.com
> > b:http://talkweb.eu
> > 
> > pgp: E69A226A Bogomil "Bogo" Shopov
> > 
> > _______________________________________________
> > Kolab-devel mailing list
> > Kolab-devel at kolab.org
> > https://kolab.org/mailman/listinfo/kolab-devel
> 
> --
> Gunnar Wrobel
> Developer, Kolab Systems AG
> 
> e: wrobel at kolabsys.com
> t: +49 700 6245 0000
> w: http://www.kolabsys.com
> 
> pgp: 9703 43BE
> 
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-- 

Bogomil "Bogo" Shopov
Senior Web Engineer


Kolab Systems AG
Zürich, Switzerland

e: shopov at kolabsys.com
t: +41 43 5016691 (ext. 2115 649)
w: http://kolabsys.com
b:http://talkweb.eu

pgp: E69A226A Bogomil "Bogo" Shopov