We using :persist => 1 option, and it return no errors. Also Data seems to be written and accessed for some time (few minutes sometimes less, and get deleted). Data loss happen during all day, and we don’t use backups.
Also note that we have problems with replication, i tried to add 2 new servers and start reballance, and it just can’t get completed. First Erlang processes crashed few times (i’m till trying to get core dump, will upload when i’ll have it). And now replication just stuck, only 2 servers out of 4 replicating, and rest of 2 stuck at 75% forever. After i manually stop replication, it says that it finished, and do not show errors that data is uneven and needed replication. But number of active items differs a lot, its not evenly distributed.
So i still have feeling that some vbuckets have problems, but completely have no idea how to debug it. Can’t find meaningful information in logs.