Yes, in this mode fsync for this mode is applied for every update. LOG_ONLY mode writes update to FS buffers, but not necessary to disk itself, so it's obviously faster. However, in this mode there is a chance to lose some of the updates in case of power loss (but not in case of node process failure).
-Val -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
