[Freeswitch-users] sql-lite db

Hello, Since a few weeks, i am using maria-db with FS 1.10.6 (1.10.6-release-18-1ff9d0a60e~64bit) Two questions : 1/ I see that I don't have the same list of db in my both FS servers, do you know what are they used for and if they are mandatory /var/lib/freeswitch/db/call_limit.db /var/lib/freeswitch/db/core.db /var/lib/freeswitch/db/fifo.db /var/lib/freeswitch/db/json.db /var/lib/freeswitch/db/sofia_reg_external.db /var/lib/freeswitch/db/sofia_reg_internal.db 2/ sometimes, some database get corrupted and FS is down until we delete the corrupted DB do you know why it happens and if there is a solution of a better DB to use with FS ? thanks franck