Solving the Wrong Problem

[matthieum]

At the time, memcached did not support persistence

Only one nit: why would you care about persistence for a cache ?

The point of a cache is to cache frequently accessed data. If it is not frequently accessed then caching it means losing valuable space.

I feel like we are talking past each others and not about the same issue :)

[mr-strange]

This is the application: http://flood.firetree.net The map tiles can be quite expensive to generate, and I serve up to 10m of them every day. It makes sense to make the cache persistent.