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Deployment

Chapter 4

Deployment scenarios

This chapter is geared towards large organizations migrating many user accounts, and the steps in this chapter are optional for smaller organization. Many small and medium-sized organizations don’t require special server topology and choose not to run a pilot migration. Familiarize yourself with the content in this chapter, and you can decide whether or not your organization needs to run a pilot migration, or if you can skip directly to “Migration overview” on page 37.

This chapter covers:

  • Running a pilot migration

  • Topology options

Running a pilot migration

When you are ready to migrate your users, you can first migrate a pilot group to estimate how long it will take to migrate all your users.

For example, you can migrate just 25 users, and then view the migration report to get the information you need to estimate the migration time for all users. Here’s how:

  • 1.

    On the report, find the average message migration rate (Rate) and number of migrated messages for those users (Total Mail Messages Migrated).

  • 2.

    Calculate the following: (total messages migrated / total users migrated) / migration rate = average migration time for one user

3.

Calculate the following: (average migration time for one user * total number of users) / number of migration threads = total migration time

For more information on threading (the number of users migrated simultaneously), see “Parallel processing” on page 15.

For more information on reports, see “Viewing Migration Reports” on page 59.

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