improving concurrency in files
Merge remote-tracking branch 'nuvolabase/master'
first version of 2q was implemented and tested
Optimization of 2q cache
LinkedLists replaced with LRULists
Lock on evicted items was fixed
First version of concurrent test(need refactoring)
Merge remote-tracking branch 'nuvolabase/master'
code was reformatted
refactoring of concurrent test
records locks was replaced with counters
merged with nuvolabase/master
merged with nuvolabase/master
Issue #1404. LRU cache was replaced by 2Q cache. Cache API was refactored to provide more robust approach for cache management.