NAME

       doc_decisions_internal_cache_md - Internal KeySet Cache

   Issue
       When doing kdbGet() possible more keys are returned which might be confusing. When doing a
       second kdbGet() with a new keyset no keys might be returned, because it is up-to-date.

       When doing kdbSet() a deep duplication is needed.

       Idea: keep a duplicated keyset internally. Return (non-deep?) duplications exactly of the
       parts as requested.

   Constraints
   Assumptions
   Considered Alternatives
       • no cache (current situation)

       • flat cache with COW

       • deep duplicated cache

   Decision
   Argument
   Implications
   Related decisions
   Notes
       internal caches lead to duplication of memory consumption (could be avoided by reference
       counting)

       in some cases caches cannot be avoided? -> filesys, databases?

       cache discussion:

       • not more keys than needed

       • kdbGet avoids IO even if done somewhere else

       • KDB handles could be more locally

       • not possible to access cache with current architecture, KDB high level API

       • implementation overhead

       • where should the caches be