IBM DS8000 manual Global Mirror Utility, TPC for Replication

The Volume Performance Advisor is an automated tool to help the storage administrator pick the best possible placement of a new LUN to be allocated from a performance perspective. It uses the historical performance statistics collected from the managed devices and locates unused storage capacity on the SAN that exhibits the best estimated performance characteristics. Allocation optimization involves several variables that are user controlled, such as the required performance level and the time of day/week/month of prevalent access. This function is fully integrated with the DM function.

For detailed information about the installation and the use of TPC for Disk, refer to the redbook IBM TotalStorage Multiple Device Manager Usage Guide, SG24-7097.

15.5.3 TPC for Replication

TPC for Replication, formerly known as MDM Replication Manager, provides a single point of control for all replication activities. Given a set of source volumes to be replicated, it will find the appropriate targets, perform all the configuration actions required, and ensure the source and target volumes relationships are set up.

TPC for Replication administers and configures the copy services functions of the managed storage systems and monitors the replication actions. It can manage two types of copy services: the Continuous Copy, also known as Peer-to-Peer Remote Copy (PPRC) and the Point-in-time Copy, also known as FlashCopy.

It supports replication sessions, which ensure that data on multiple related heterogeneous volumes is kept consistent, provided that the underlying hardware supports the necessary primitive operations. Multiple pairs are handled as a consistent unit, Freeze-and-Gofunctions can be performed when mirroring errors occur. It is designed to control and monitor the data replication operations in large-scale customer environments.

TPC for Replication provides a user interface for creating, maintaining, and using volume groups and for scheduling copy tasks. It populates the lists of volumes using the DM interface. An administrator can also perform all tasks with the TPC for Replication command-line interface.

15.6 Global Mirror Utility

The DS8000 Global Mirror Utility (GMU) is a standalone tool to provide a management layer for IBM TotalStorage Global Mirror failover and failback (FO/FB). It provides clients with a set of twelve basic commands that utilize the DS Open-API to accomplish either a planned or unplanned FO/FB sequence.

The purpose of the GMU is to automate the complex sequence of steps necessary to set up and manage Global Mirror relationships for a large number of LUNs. There is no limitation to the number of volumes managed by GMU.

In the event of a planned or unplanned FO/FB, the system administrator issues a few GMU commands to recover consistent data on the remote site before he starts host I/O activities. The GMU commands can be incorporated in user scripts or utilities to further automate datacenter operations. However, IBM does not support such scripts or utilities without a specific service arrangement.

The GMU is distributed on a separate CD with the DS8000 Licensed Internal Code (LIC). It includes installation instructions and a user guide. It consists of two components, a server and a client. The server receives requests from the client and communicates over TCP/IP to

330DS8000 Series: Concepts and Architecture