GFS_CONTROLD - Online Linux Manual PageSection : 8
Updated : 2009-01-19
Source : cluster
Note : cluster
NAMEgfs_controld − daemon that coordinates gfs mounts and recovery
SYNOPSISgfs_controld [OPTIONS]
DESCRIPTIONGFS lives in the kernel, and the cluster infrastructure (corosync membership and group management) lives in user space. GFS in the kernel needs to adjust/recover for certain cluster events. It's the job of gfs_controld to receive these events and reconfigure gfs as needed. gfs_controld controls and configures gfs through sysfs files that are considered gfs-internal interfaces. Mounting and node failure are the main cluster events that gfs_controld controls. It also manages the assignment of journals to different nodes. mount.gfs2(8) communicates with gfs_controld to join the mount group and receive the necessary options for the kernel mount. The cman init script usually starts the gfs_controld daemon.
OPTIONSCommand line options override a corresponding setting in cluster.conf. −D Enable debugging to stderr and don't fork.
See also gfs_control dump in gfs_control(8). −L Enable debugging to log file.
See also logging in cluster.conf(5). −g num groupd compatibility mode, 0 off, 1 on.
Default 0. −w num Enable (1) or disable (0) withdraw.
Default 1. −h Print a help message describing available options, then exit. −V Print program version information, then exit.
Cluster UpgradingWhen performing a rolling upgrade from cluster2 to cluster3, the gfs_controld daemon runs in cluster2 compatibility mode and processes posix lock (plock) requests from the dlm to remain compatible with cluster2 nodes. Otherwise, dlm_controld(8) handles plocks. −p num Enable (1) or disable (0) plock code for cluster fs.
Default 1. −l num Limit the rate of plock operations, 0 for no limit.
Default 0. −o num Enable (1) or disable (0) plock ownership.
Default 0. −t ms Plock ownership drop resources time (milliseconds).
Default 10000. −c num Plock ownership drop resources count.
Default 10. −a ms Plock ownership drop resources age (milliseconds).
Default 10000. −P Enable plock debugging messages (can produce excessive output).
FILEScluster.conf(5) is usually located at /etc/cluster/cluster.conf. It is not read directly. Other cluster components load the contents into memory, and the values are accessed through the libccs library. Configuration options are added to the <gfs_controld /> section of cluster.conf, within the top level <cluster> section. enable_withdraw Set to 1/0 to enable/disable a response to a withdraw. <gfs_controld enable_withdraw="1"/>
Cluster UpgradingSee note above about compatibility plock handling during a rolling upgrade. The following options are deprecated, see dlm_controld(8) for the new equivalent options. enable_plock See command line description. <gfs_controld enable_plock="1"/> plock_rate_limit See command line description. <gfs_controld plock_rate_limit="0"/> plock_ownership See command line description. <gfs_controld plock_ownership="0"/> drop_resources_time See command line description. <gfs_controld drop_resources_time="10000"/> drop_resources_count See command line description. <gfs_controld drop_resources_count="10"/> drop_resources_age See command line description. <gfs_controld drop_resources_age="10000"/> plock_debug Enable (1) or disable (0) plock debugging messages (can produce excessive output). Default 0. <gfs_controld plock_debug="0"/>
SEE ALSOmount.gfs2(8), gfs_control(8), dlm_controld(8), cman(5), cluster.conf(5) 0
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