VERITAS Volume Manager 4.1 Administrator's Guide

Administering Volumes

Monitoring and Controlling Tasks

Chapter 8 269

• pausePuts a running task in the paused state, causing it to suspend

operation.

resumeCauses a paused task to continue operation.

setChanges modiﬁable parameters of a task. Currently, there is only one

modiﬁable parameter, slow[=iodelay], which can be used to reduce the

impact that copy operations have on system performance. If slow is

speciﬁed, this introduces a delay between such operations with a default

value for iodelay of 250 milliseconds. The larger the value of iodelay that

is speciﬁed, the slower is the progress of the task and the fewer system

resources that it consumes in a given time. (The slow attribute is also

accepted by the vxplex, vxvol and vxrecover commands.)

vxtask Usage

To list all tasks currently running on the system, use the following

command:

# vxtask list

To print tasks hierarchically, with child tasks following the parent tasks,

us the -h option, as follows:

# vxtask -h list

To trace all tasks in the disk group foodg that are currently paused, as

well as any tasks with the tag sysstart, use the following command:

# vxtask -G foodg -p -i sysstart list

Use the vxtask -p list command lists all paused tasks, and use vxtask

resume to continue execution (the task may be speciﬁed by its ID or by

its tag):

# vxtask -p list

# vxtask resume 167

To monitor all tasks with the tag myoperation, use the following

command:

# vxtask monitor myoperation

To cause all tasks tagged with recovall to exit, use the following

command:

# vxtask abort recovall