HP-UX 11i v3 - lvsync.1m man page

l
lvsync(1M) lvsync(1M)
(Requires Optional HP MirrorDisk/UX Software)
NAME
lvsync - synchronize stale mirrors in LVM logical volumes
SYNOPSIS
/usr/sbin/lvsync
[-T] lv_path ...
Remarks
This command requires the installation of the optional HP MirrorDisk/UX software (not included in the
standard HP-UX operating system) before it can be used.
If the logical volume input arguments belong to a combination of volume groups version 1.0 and 2.0 or
higher, the arguments may not be processed in the order they are listed on the command line.
DESCRIPTION
The
lvsync command synchronizes the physical extents of each logical volume specified by lv_path .
Synchronization occurs only on physical extents that are stale mirrors of the original logical extent. The
synchronization process can be time consuming, depending on the hardware characteristics and the
amount of data.
Arguments
lvsync recognizes the following argument:
lv_path The block device path name of a mirrored logical volume.
Options
lvsync recognizes the following option:
-T Perform mirror synchronization of logical volumes within a volume group using multiple
parallel threads. Logical volumes belonging to different volume groups will be synchron-
ized serially. It is possible that logical volumes start and/or complete their synchroniza-
tion in a different order than specified on the command line.
The maximum number of threads used can be controlled using the
PTHREAD_THREADS_MAX
system tunable.
NOTE: This option has no effect if the volume group is activated in shared mode.
EXTERNAL INFLUENCES
Environment Variables
LANG determines the language in which messages are displayed.
If
LANG is not specified or is null, it defaults to "C" (see lang(5)).
If any internationalization variable contains an invalid setting, all internationalization variables default
to "C" (see environ (5)).
EXAMPLES
Synchronize the mirrors on a logical volume:
lvsync /dev/vg01/lvol5
Synchronize the mirrors on three logical volumes using multiple parallel threads:
lvsync -T /dev/vg02/lvol1 /dev/vg02/lvol2 /dev/vg02/lvol3
Add mirror copies using lvextend with the -s option for three logical volumes, and then synchronize
mirrors on these three logical volumes using multiple parallel threads.
First, add mirror copies to each logical volume using
lvextend with the -s option:
lvextend -m 1 -s /dev/vg03/lvol1
lvextend -m 2 -s /dev/vg03/lvol2
lvextend -m 2 -s /dev/vg03/lvol3
Now synchronize the mirrors on these three logical volumes using multiple parallel threads:
lvsync -T /dev/vg03/lvol1 /dev/vg03/lvol2 /dev/vg03/lvol3
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1