Igniters, I want to re-iterate idea of changing default synchronization mode from PRIMARY_SYNC to FULL_SYNC.
Motivation: 1) If user set [cacheMode=PARTITIONED, backups=1] he still could loose data silently. Because primary node could report success to the client and then crash before data is propagated to backups. 2) If user set [cacheMode=REPLICATED] and use SQL, he will might get invalid results if cache is being updated concurrently - well known issue. The only advantage of PRIMARY_SYNC is slightly better performance, but we should prefer correctness over performance. Proposed changes: 1) Make FULL_SYNC default; 2) Print a warning about possibly incorrect SQL results if REPLICATED cache is started in PRIMARY_SYNC mode. Thoughts? Vladimir.
