Setting up data replication
This topic describes the how to set up data replication in your environment, including creating sessions and adding copy sets to those sessions.
About this task
In a replication session, the number of volumes in a copy set and the role that each volume in the copy set plays are determined by the session type.
- Sessions
A session completes a specific type of data replication for a specific set of volumes. During data replication, data is copied from a source volume to one or more target volumes, depending on the session type. The source volume and target volumes that contain copies of the same data are collectively referred to as a copy set. A session can contain one or more copy sets. - Session types
Copy Services Manager provides several methods to replicate data. The type of data replication that is associated with a session is known as the session type. - Session commands
The commands that are available for a session depend on the session type, and for some commands, the storage system type. - Site awareness
You can associate a location with each storage system and each site in a session. This site awareness ensures that only the volumes whose location matches the location of the site are allowed for selection when you add copy sets to the session. This prevents a session relationship from being established in the wrong direction. - Preserve Mirror option
This topic presents recommendations for using the Preserve Mirror option in FlashCopy® and Metro Mirror sessions. - Creating sessions and adding copy sets
A session completes a specific type of data replication for a specific set of volumes. During data replication, data is copied from a source volume to one or more target volumes, depending on the session type. The source volume and target volumes that contain copies of the same data are collectively referred to as a copy set. A session can contain one or more copy sets. - Managing space
You have methods for managing space in Copy Services Manager, including the Reflash After Recover option, and the Free Journal Space command for sessions that contain Global Mirror relationships. - Working with user-defined consistency groups
A consistency group is a set of target volumes that are updated to preserve write order, and are therefore recoverable. You can define the name of a consistency group and use that name to assign multiple Global Mirror or Metro Global Mirror sessions to the same consistency group. - Completing session administration tasks
Use session commands to complete session tasks such as starting, stopping, suspending, or terminating sessions. - Setting a user-defined group name for one or more sessions
You can assign one or more sessions to a user-defined group. - Removing a user-defined group name from one or more sessions
You can remove the group name assignment from one or more sessions. - Restore FlashCopy session
A FlashCopy session can be restored such that the direction of a persistent FlashCopy relationship is reversed. - Using the Metro Mirror heartbeat
This topic provides information about Metro Mirror heartbeat, including how to enable and disable the heartbeat. - Exporting copy set data
You can export data about all copy sets in a specific session to maintain a backup copy that can be used to recover if you lose your session or upgrade to a different server. - Importing copy set data
You can import copy set data that was previously exported to a comma separated value (CSV) file. - Exporting historical data for Global Mirror role pairs
You can export data for a Global Mirror role pair that is in a IBM® DS8000® session to a comma-separated value (CSV) file. You can then use the data in the CSV file to analyze trends in your storage environment that affect your recovery point objective (RPO). - Exporting historical RPO data for SAN Volume Controller Global Mirror with Change Volume sessions
You can use the GUI or the CLI to export historical RPO data for SAN Volume Controller Global Mirror with Change Volume sessions. - Modifying the location of session sites
You can change the location that is associated with each site in session. - Removing sessions
This topic describes how to remove sessions. - Removing copy sets
This topic describes how to remove copy sets. - Creating scheduled tasks
You can schedule tasks for Copy Services Manager. - Migrating existing hardware relationships to Copy Services Manager
You can convert existing hardware relationships for copy services to a Copy Services Manager session.