Hi cephers， I have met a monitor problem with capacity too large in our production environment. This logical volume for monitor is 100GB, the capacity can grow to 95GB, and then go down. Sometimes, the monitor process can not start ,we have to rebuild the monitor. Then we set a crontab task, every week we compact the monitor at a assigned point time. The command is "ceph tell mon.xx compact", While the monitor is compacting(it can last for 80 seconds), the monitor is down by lease timeout. When the compact task complete, the monitors vote again ,the monitor is up and active. In monitor message dispatch code, while one command is executing , it must have the dispatch lock. So indeed all command are executing synchronously. If one command is executing for long time, others command must wait. So I change the monitor tell compact command to just add a task(compact range(0,0)) to the monitor compact thread to execute the compact task, so the monitor tell compact command can execute immediately. PATCH: https://github.com/penglaiyxy/ceph/commit/86bcfd2ccb349ccc05512d8df9deaf9b368524db I have test the patch, no monitor down, no message block, everything work fine. Glad to receive any ideas! Best regards, brandy -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
