ocfs2_hb_ctl8
Starts and stops the o2cb local heartbeat on a given device.
Usage
ocfs2_hb_ctl -S
-d
device
service
ocfs2_hb_ctl -S
-u
uuid
service
ocfs2_hb_ctl -K
-d
device
service
ocfs2_hb_ctl -K
-u
uuid
service
ocfs2_hb_ctl -I
-d
device
ocfs2_hb_ctl -I
-u
uuid
ocfs2_hb_ctl -P
-d
device
[-n
io_priority]
ocfs2_hb_ctl -P
-u
uuid
[-n
io_priority]
ocfs2_hb_ctl -h
Overview
ocfs2_hb_ctl starts and stops local heartbeat on a OCFS2 device. Users are strongly urged not to use this tool directly. It is automatically invoked by mount.ocfs2(8) and other tools that require heartbeat notifications.
This utility only operates in the local heartbeat mode. It fails silently when run in global heartbeat mode. More information on the heartbeat modes can be found in o2cb(7).
The tools accepts devices to be specified by its name or its uuid. Service denotes the application that is requesting the heartbeat notification.
Options
-
-S -
Starts the heartbeat.
-
-K -
Stops the heartbeat.
-
-I -
Prints the heartbeat reference counts for that heartbeat region.
-
-d -
Specify region by device name.
-
-u -
Specify region by device uuid.
-
-n -
Adjust IO priority for the heartbeat thread. This option calls the
ionicetool to set its IO scheduling class to realtime with scheduling class data as provided. This option is usable only with theO2CBcluster stack.
-
-h -
Displays help and exit.
Releases
10 releases since Debian 4.0 (Etch); the text changed 8 times.
-n since Debian 6.0 (Squeeze).