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Chapter 10. DS CLI 209
Migration considerations
If your environment is currently using the ESS CS CLI to manage Copy Services on your
model 800s, you could consider migrating your environment to the DS CLI. Your model 800s
will need to be upgraded to a microcode level of 2.4.2 or above.
If your environment is a mix of ESS F20s and ESS 800s, it may be more convenient to keep
using only the ESS CLI. This is because the DS CLI cannot manage the ESS F20 at all, and
cannot manage storage on an ESS 800. If, however, a DS6000/8000 were to be added to
your environment, then you would use the DS CLI to manage remote copy relationships
between the DS6000/8000s and the ESS 800s. You could still use the ESS CLI to manage
the storage on the F20 and 800, FlashCopy on the F20 and any remote copy relationships
between the F20 and the 800.
10.9.1 Migration tasks
There are two phases to migrate existing FlashCopy or Remote Mirror and Copy scripts and
tasks from the ESS CLI to the DS CLI.
Phase one: Review
1. Review saved tasks in the ESS 800 Web Copy Services GUI and note the details of every
saved task that you wish to migrate. You can also use the ESS CLI to display the contents
of each saved task and write them to a file.
2. Review server scripts that perform task set up and execute saved ESS tasks.
Phase two: Perform
Having performed the review, the scripts need to be changed and created:
1. Translate the contents of the saved ESS 800 tasks into DS CLI commands. A
mini DS CLI
script could be created for every saved task.
2. Translate server scripts that perform task set up and execute saved ESS 800 tasks. This
may involve the use of DS CLI commands to perform task setup and the execution of the
newly created mini scripts to achieve the same results as the saved tasks.
10.10 DS CLI migration example
As detailed previously, existing users of the ESS CS CLI with an ESS 800 can consider
migrating saved tasks to the DS CLI.
10.10.1 Determining the saved tasks to be migrated
Step one is to gather information regarding all saved tasks. This can be done via the GUI or
the command line. In this example there are many saved tasks (but only five are shown).
Figure 10-6 and Example 10-12 show two ways to get a list of saved tasks on the ESS CS
Server. In Figure 10-6 the
Tasks button has been selected in the ESS 800 Web Copy
Services GUI.
Note: You might consider requesting assistance from IBM in the migration phase.
Depending on your geography, IBM can offer CLI migration services to help you ensure the
success of your project.