Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

290 Administering volumes
Performing online relayout
Viewing the status of a relayout
Online relayout operations take some time to perform. You can use the vxrelayout
command to obtain information about the status of a relayout operation. For example, the
command:
# vxrelayout -g mydg status vol04
might display output similar to this:
STRIPED, columns=5, stwidth=128--> STRIPED, columns=6,
stwidth=128
Relayout running, 68.58% completed.
In this example, the reconfiguration of a striped volume from 5 to 6 columns is in
progress, and is just over two-thirds complete.
See the vxrelayout(1M) manual page for more information about this command.
If you specified a task tag to
vxassist when you started the relayout, you can use this tag
with the
vxtask command to monitor the progress of the relayout. For example, to
monitor the task tagged as myconv, enter:
# vxtask monitor myconv
Controlling the progress of a relayout
You can use the vxtask command to stop (pause) the relayout temporarily, or to cancel
it altogether (
abort). If you specified a task tag to vxassist when you started the
relayout, you can use this tag to specify the task to
vxtask. For example, to pause the
relayout operation tagged as myconv, enter:
# vxtask pause myconv
To resume the operation, use the vxtask command:
# vxtask resume myconv
For relayout operations that have not been stopped using the vxtask pause command
(for example, the
vxtask abort command was used to stop the task, the transformation
process died, or there was an I/O failure), resume the relayout by specifying the
start
keyword to
vxrelayout, as shown here:
# vxrelayout -g mydg -o bg start vol04
Note: If you use the vxrelayout start command to restart a relayout that you
previously suspended using the
vxtask pause command, a new untagged task is created
to complete the operation. You cannot then use the original task tag to control the relayout.
The
-o bg option restarts the relayout in the background. You can also specify the slow
and
iosize option modifiers to control the speed of the relayout and the size of each
region that is copied. For example, the following command inserts a delay of 1000
milliseconds (1 second) between copying each 10-megabyte region:
# vxrelayout -g mydg -o bg,slow=1000,iosize=10m start vol04