Red Hat Enterprise Linux 5 Cluster Suite Overview page 60

Chapter 2. Red Hat Cluster Suite Component Summary
Function
GNBD
LVS
52
Components
gfs_fsck
gfs_grow
gfs_jadd
gfs_mkfs
gfs_quota
gfs_tool
mount.gfs
gnbd.ko
gnbd_export
gnbd_import
gnbd_serv
pulse
Description
Command that repairs an unmounted
GFS file system.
Command that grows a mounted GFS
file system.
Command that adds journals to a
mounted GFS file system.
Command that creates a GFS file
system on a storage device.
Command that manages quotas on a
mounted GFS file system.
Command that configures or tunes a
GFS file system. This command can also
gather a variety of information about the
file system.
Mount helper called by mount(8); not
used by user.
Kernel module that implements the
GNBD device driver on clients.
Command to create, export and manage
GNBDs on a GNBD server.
Command to import and manage
GNBDs on a GNBD client.
A server daemon that allows a node to
export local storage over the network.
This is the controlling process which
starts all other daemons related
to LVS routers. At boot time, the
daemon is started by the /etc/rc.d/
init.d/pulse script. It then reads the
configuration file /etc/sysconfig/
ha/lvs.cf. On the active LVS router,
pulse starts the LVS daemon. On the
backup router, pulse determines the
health of the active router by executing a
simple heartbeat at a user-configurable
interval. If the active LVS router fails
to respond after a user-configurable
interval, it initiates failover. During
failover, pulse on the backup LVS
router instructs the pulse daemon on
the active LVS router to shut down all
LVS services, starts the send_arp
program to reassign the floating IP
addresses to the backup LVS router's
MAC address, and starts the lvs
daemon.