Does a "Memcached backed on a database" exists ?

[Ivan Krstic]

Arnaud Connois wrote:
> This would prevent the cache from going
> away when memcached is shutted down, and could act not only as a cache
> but also as a database for storing objects.

Memcached is not a database. It's not designed to be a database, and
while it's impossible to keep you from using it as one, you'll probably
get burned unless you know *exactly* what you're doing. Make sure you
understand the implications.

> While googling I came across something called Tugela Cache based on
> memcached (http://meta.wikimedia.org/wiki/Tugelacache)  that seems to do
> exactly just that, but it seems dedicated to Mediawiki use only.

There is absolutely nothing MediaWiki-specific to Tugela; I don't know
where you got the idea. Tugela simply replaces memcached's allocator
with a Berkeley database; the change is far too low in the stack to
easily be able to be MediaWiki-specific.

-- 
Ivan Krstic <krstic at fas.harvard.edu> | 0x147C722D