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.

11.9.1 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.

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.

11.10 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.

11.10.1 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 11-6and Example 11-12show two ways to get a list of saved tasks on the ESS CS Server. In Figure 11-6the Tasks button has been selected in the ESS 800 Web Copy Services GUI.

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IBM DS8000 DS CLI migration example, Migration tasks, Determining the saved tasks to be migrated, Migration considerations