tree 390b03aa57e46d449c0d3b1c2cd2718e66a24a85
parent a04071045f1459e0a44596c025bb4b2622726eb6
author luochen <cluo8@uci.edu> 1568985580 -0400
committer Luo Chen <cluo8@uci.edu> 1569301395 +0000

[ASTERIXDB-2600][STO] Introduce ConcurrentMergePolicy

- user model changes: yes. Add a new merge policy and make it as default
- storage format changes: no.
- interface changes: no.

Details:
- Introduce ConcurrentMergePolicy that performs concurrent merges
without the maximum component size.
- Make this merge policy as the default merge policy in AsterixDB since
the PrefixMergePolicy has made some wrong design decisions.

Change-Id: I2ed79847584b9fe846d62ad56ee094863538a2a2
Reviewed-on: https://asterix-gerrit.ics.uci.edu/3463
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Luo Chen <cluo8@uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>
Reviewed-by: Murtadha Hubail <mhubail@apache.org>