This backend uses the following types of keys:
- entry_xxx
the actual cache entry with the data to be stored
- tag_xxx
xxx is tag name, value is array of associated identifiers identifier. This
is "forward" tag index. It is mainly used for obtaining content by tag
(get identifier by tag -> get content by identifier)
- ident_xxx
xxx is identifier, value is array of associated tags. This is "reverse" tag
index. It provides quick access for all tags associated with this identifier
and used when removing the identifier
- tagIndex
Value is a List of all tags (array)
Each key is prepended with a prefix. By default prefix consists from two parts
separated by underscore character and ends in yet another underscore character:
- "Flow"
- MD5 of path to Flow and the current context (Production, Development, ...)
This prefix makes sure that keys from the different installations do not
conflict.