Status of Tag implementation?

Jan Miczaika jan at
Tue Oct 30 19:13:28 UTC 2007

We have implemented a "best-effort" tagging system without memcache 
modifications, by extending the Zend Framework Cache component. For each 
tag there is a key, which contains a serialized list of keys associated 
with it.

One has to be careful to have fairly unique tags, else the entries get 
too long (ids work well). Also, if the tag keys are evicted or lost we 
cannot flush properly.

This mechanism has reduced the number of flushed keys considerably.

I'd prefer a memcache solution, though.

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