HP 3PAR CIM API Programming Reference

Replication Services Profile
This new profile extends the functionality of the Copy Services Subprofile by including enhanced
local replication for thinly provisioned storage objects, remote replication (not supported in this
release), and support for replication groups and consistency group.
Key features include:
• Specify individual or Groups of elements to manage replication
• Support Consistency Management
• Handle local, and in the future remote, replication seamlessly
• Explicitly replicate Thinly Provisioned elements
• Offer different Copy Methodologies
1. Synchronized Replication - indicates that updates to a source element are reflected to the target
element, although the target element may or may not be updated immediately
2. SyncType - describes the replication policy supported by this profile. There are three defined
types:
a. Clone - Creates a point-in-time, independent, copy of the source element.
b. Mirror - Creates and maintains a synchronized mirror copy of the source. Writes done
to the source element are reflected to the target element. The target element remains
dependent on the source element.
c. Snapshot - Creates a point-in-time, virtual image of the source element. The target element
remains dependent on the source element. Snapshots are commonly known as delta
replicas and contain incrementally changed data as well as references (e.g. pointers) to
the unchanged source element data.
3. Mode - controls when the write operations are performed. There are 2 defined modes:
a. Synchronous - The writer waits until the write operations are committed to both the source
and target elements; or to both the source element and a target related entity, such as
pointer tables.
b. Asynchronous - The writer waits until the write operations are committed to the source
elements only. In this mode, there can be a delay before the write operations are committed
to the target elements.
104 CIM API SMI-S Support