cmirrord(8) — Linux manual page


CMIRRORD(8)              System Manager's Manual             CMIRRORD(8)

NAME         top

       cmirrord — cluster mirror log daemon

SYNOPSIS         top

       cmirrord [-f|--foreground] [-h|--help]

DESCRIPTION         top

       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         top

              Do not fork and log to the terminal.

              Print usage.

SEE ALSO         top

       lvmlockd(8), lvm(8), syslog(3), signal(7)

COLOPHON         top

       This page is part of the lvm2 (Logical Volume Manager 2) project.
       Information about the project can be found at 
       ⟨⟩.  If you have a bug report for
       this manual page, see ⟨⟩.
       This page was obtained from the tarball
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       2021-08-27.  If you discover any rendering problems in this HTML
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       part of the original manual page), send a mail to

Red Hat Inc         LVM TOOLS 2.03.13(2) (2021-08-11)        CMIRRORD(8)

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