HP StorageWorks Storage Mirroring Scripting Guide (T2558-96327, April 2009)

7 - 11
5. The data is applied on the target as it is received. Since the task command was inserted inline,
the replication data from the source is applied to the target first. When the target gets to the
Storage Mirroring task command, the target data will be in the exact same state as the source
data when the source application service was stopped. Since this was a stable point on the
source, it is also a stable point on the target.
6. The target processes the Storage Mirroring task command and completes whatever task is
defined, perhaps a snapshot or backup. Since the Storage Mirroring task command is
user-defined, you can insert any valid executable or batch file.
Storage Mirroring task command processing must be enabled, and there must be an active Storage
Mirroring connection for task command processing to function properly. To insert a task command,
you would use the
queuetask command. Also, see Creating a backup or snapshot of the target
by inserting a task command during replication on page 17-4 for a sample script which can be
used as a basis for creating a script for your own environment.
Command QUEUETASK
Description Queues tasks inline with replication data.
Syntax
QUEUETASK <job_name> TO <target> ONQUEUE = <task> [args]
| ONTRANSMIT = <
task> [args] | ONRECEIVE = <task> [args] |
ONEXECUTE = <
task> [args] [TIMEOUT = <timeout>]
[INTERACT | NOINTERACT]
Options
 job_name—Unique job name assigned to this task. This will be the
identifier you see in the log files.
 target—Name of the target, an IP address on the target, or a virtual IP
address. Depending on the network route Storage Mirroring uses to
access the target, you may need to specify the fully qualified domain
name. The target is required even if you are only queuing a task to be
executed on the source.
 ONQUEUE—Execute the specified task on the source machine as soon as
the source receives and queues the task. During heavy replication, there
may be a delay while the task is queued inline with the replication
operations.
 ONTRANSMIT—Execute the specified task on the source machine just
before the source transmits the task to the target.
 ONRECEIVE—Execute the specified task on the target machine as soon
as the target receives and queues the task.
 ONEXECUTE—Execute the specified task on the target when the target
processes the task from the queue. Since the task is not executed until it
is processed, if the target is paused, the task will be held in queue.
 task—The path and filename of the task to run relative to the machine it
will be run on. Tasks include any valid executable or batch file. The
executables or files must exist in the specified location on the machine
where they will be executed
 args—Arguments or options which need to be supplied with the task.
Multiple arguments can be supplied in a space-separated list enclosed in
quotation marks.