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cmirrord(8)

Red Hat Inc
LVM TOOLS 2.03.05(2) (2019-06-15)

clvm

Cluster extensions for userland logical volume management tools

cmirror

Daemon for device-mapper-based clustered mirrors

lvm2-cmirrord

Clustered RAID 1 support using device-mapper and corosync

NAME

cmirrord — cluster mirror log daemon

SYNOPSIS

cmirrord [-f] [-h]

DESCRIPTION

cmirrord is the daemon that tracks mirror log information in a cluster. It is specific to device-mapper based mirrors (and by extension, LVM cluster mirrors). Cluster mirrors are not possible without this daemon running.
This daemon relies on the cluster infrastructure provided by the corosync, which must be set up and running in order for cmirrord to function.
Output is logged via syslog(3). The SIGUSR1 signal(7) can be issued to cmirrord to gather current status information for debugging purposes.
Once started, cmirrord will run until it is shutdown via SIGINT signal. If there are still active cluster mirrors, however, the signal will be ignored. Active cluster mirrors should be shutdown before stopping the cluster mirror log daemon.

OPTIONS

-f, --foreground Do not fork and log to the terminal.
-h, --help Print usage.
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