NAME¶

volume.reiser4 - the program for managing reiser4 logical volumes.

SYNOPSIS¶

volume.reiser4 [ options ] [ FILE ] [ MNT ]

DESCRIPTION¶

volume.reiser4 is an utility to manage reiser4 logical (compound) volumes. It performs operations on logical volumes like adding[removing] a brick to[from] your volume, changing capacity of any brick of your volume, increasing current upper limit on total number of bricks in your volume. On-line options are applicable only to mounted volumes. Other options don't have such restrictions. This program doesn't create initial volume. Instead, it operates on bricks, which are formatted partitions. To create a brick use mkfs.reiser4(8) utility. For more details see logical volumes administration guide at https://reiser4.wiki.kernel.org/index.php/Logical_Volumes_Administration

COMMON OPTIONS¶

-V, --version

Prints program version.

-?, -h, --help

Prints program help.

-y, --yes

Assumes an answer 'yes' to all questions.

OFF-LINE OPTIONS¶

-g, --register DEV

Register a brick associated with device DEV in the system.

-u, --unregister DEV

Unregister a brick associated with device DEV in the system.

-l, --list

Print list of all bricks registered in the system.

ON-LINE OPTIONS¶

-p, --print N

Print information about a brick of serial number N in the volume mounted at MNT.

-b, --balance

Run a balancing procedure on a volume mounted at MNT.

-z, --resize DEV

Change data capacity of a brick associated with device DEV in the volume mounted at MNT. The actual capacity has to be defined by the option "-c (--capacity)".

-c, --capacity VALUE

Define new data capacity VALUE for a device specified by option "-z (--resize)".

-a, --add DEV

Add a brick associated with device DEV to the volume mounted at MNT. This operation makes the volume unbalanced. Using in conjunction with -B (--with-balance) option, completes the operation with balancing.

-x, --add-proxy

Add a proxy brick associated with device DEV to the volume mounted at MNT.

-r, --remove

Remove a brick associated with device DEV from the volume mounted at MNT. Automatically triggers balancing, which is considered as a part of the removal operation. Being interrupted for some reasons, should be completed by running the utility with the option -R (--finish-removal).

-q, --scale N

Increase 2^N times the upper limit for total number of bricks in the volume mounted at MNT. This operation makes the volume unbalanced. Using in conjunction with -B (--with-balance) option, completes the operation with balancing.

-m, --migrate N

Move all data blocks of regular FILE to a brick of serial number N.

-i, --set-immobile

Set "immobile" property to regular FILE.

-e, --clear-immobile

Clear "immobile" property of regular FILE.

-B, --with-balance

Complete a volume operation with balancing procedure. Can be used only in conjunction with options -a (--add), -z (--resize), -q (--scale).

-R, --finish-removal

Finish brick removal operation interrupted for various reasons.

-S, --restore-regular

Restore regular distribution on the volume mounted at MNT.

Examples:¶

To create a volume, choose volume ID and stripe size. Then create a first brick, that will be the meta-data brick of your volume:

VOL_ID=`uuidgen`

STRIPE=256K

mkfs.reiser4 -U $VOL_ID -t $STRIPE /dev/sdb1

To add a data brick to your initial volume, consisting of only one meta-data brick, mount it e.g. at /mnt:

mount /dev/sdb1 /mnt

Choose a block device for your data brick (e.g. /dev/sdb2) and format it with the same volume ID and stripe size:

mkfs.reiser4 -a -U $VOL_ID -t $STRIPE /dev/sdb2

Finally, using option "-a", add it to the volume:

volume.reiser4 -a /dev/sdb2 /mnt

After this, you might want to run balancing procedure on your volume. It will distribute all your data among the bricks fairly, i.e. in a proportion with bricks capacities. For this simply run the utility with the option -b (--balance):

volume.reiser4 -b /mnt

To remove a brick from your logical volume simply specify the block device that the brick is associated with, using option "-r":

volume.reiser4 -r /dev/sdb2 /mnt

After successful removal completion your volume is always balanced. If the operation of brick removal was interrupted for some reasons, then complete the removal by running the utility with the option -R (--finish-removal):

volume.reiser4 -R /mnt

REPORTING BUGS¶

Report bugs to <reiserfs-devel@vger.kernel.org>

SEE ALSO¶

mkfs.reiser4(8), debugfs.reiser4(8),
Reiser4 logical volumes administration guide at https://reiser4.wiki.kernel.org/index.php/Logical_Volumes_Administration

AUTHOR¶

Written by Edward O. Shishkin