Consistency is good - so is backward compatibility - our CloudCache
implementation relies upon ActiveSupport::Cache, so prefer that nothing be
deprecated, and if so, with a long lead time.

Thanks,


m

getCloudCache.com



On Sat, Apr 24, 2010 at 11:48 AM, Brian Durand <br...@embellishedvisions.com
> wrote:

> > This I'm not so sold on,  expires in is a memcached implementation
> > specific feature and adding it to all the other cache stores simply
> > seems to add overhead for very little gain.  No one is seriously going
> > to be using MemoryStore or FileStore in production and wanting to use
> > :expires_in.  What was it you needed this for?
>
> Mostly what I wanted was for the caches to be consistent. I think
> having caches support a time to live on write is a pretty fundamental
> feature of a cache because otherwise you are stuck needing to know
> what every cache entry is so you can expire it when necessary. For a
> small site on a single server, I think MemoryStore or FileStore could
> be a perfectly viable option.
>
> > >    * Add support for :race_condition_ttl to fetch. This setting can
> > > prevent race conditions on fetch calls where several processes try to
> > > regenerate a recently expired entry at once.
> >
> > Can you expand on this?
>
> The logic is that if you specify a race condition ttl, and a process
> finds a recently expired entry in the cache during a fetch, it will
> first put it back in the cache with an expiration time shortly in the
> future. It will then regenerate the entry and store it in the cache.
> The advantage is that it can reduce race conditions when a cache entry
> expires and you can have potentially dozens of processes trying to
> regenerate the entry at the same time. If the process that is
> regenerating the entry fails, another process will try again shortly
> when the old entry expires again.
>
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