ocf:sfex — Manages exclusive access to shared storage using Shared Disk File EXclusiveness (SF-EX)
[OCF_RESKEY_device=string] [OCF_RESKEY_index=integer] [OCF_RESKEY_collision_timeout=integer] [OCF_RESKEY_monitor_interval=integer] [OCF_RESKEY_lock_timeout=integer] sfex [start | stop | monitor | meta-data | validate-all]
Block device path that stores exclusive control data.
Location in block device where exclusive control data is stored. 1 or more is specified. Default is 1.
Waiting time when a collision of lock acquisition is detected. Default is 1 second.
Monitor interval(sec). Default is 10 seconds
Valid term of lock(sec). Default is 100 seconds. The lock_timeout is calculated by the following formula. lock_timeout = monitor_interval + "The expiration time of the lock" We suggest 90 seconds as a default value of the "The expiration time of the lock", but you should change it in consideration of access delay to the shared disk and the switch time of the multipath driver. The lock timeout have an impact on start action timeout because start action timeout value is calculated by the following formula. start timeout = collision_timeout + lock_timeout + "safety margin" The "safety margin" is decided within the range of about 10-20 seconds(It depends on your system requirement).