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GDO7_CACHE.md

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GDOv7 Cache

INDEX

There are 3 caches in use.

  • Process GDO object cache
  • Memcached GDO object cache
  • Filecache (pre-rendered output, lang files, etc)

GDOv7 Cache: Clearing all caches.

If you want to clear all caches, use the ClearCache Method

$ gdo_adm.sh clearcache
# OR
$ gdo admin.clearcache

GDOv7 Cache: Memcached

In case there is no Memcached installed you should set the GDO_MEMCACHE config.php setting to '2'. In Memcached i store sessions, initialized modules, complete configuration tables like languages and countries and other hot GDO objects. This is working not too well. If GDO_MEMCACHE is set to 2, a fallback GDO_FILECACHE is used. This works great!

GDOv7 Cache: Process Cache

All three caches are implemented in the Cache class. The GDO process cache is caching GDO column structures and ID => GDO mappings for a GDO. The cash is fresh on each request. This cache can be populated by the database or an Memcached daemon.

GDOv7 Cache: File Cache

This is a simple key => file store in the filesystem.

Of course this does not make sense for tiny values, but a a good usage is for the i18n database. All that 1000 key => value array is php serialized into a cached file with a lifetime.