Introducing resource recovery

Many computer resources are so critical to a company's work that the integrity of these resources must be guaranteed. If changes to the data in the resources are corrupted by a hardware or software failure, human error, or a catastrophe, the computer must be able to restore the data. These critical resources are called protected resources or, sometimes, recoverable resources.

Resource recovery is the protection of the resources. Resource recovery consists of the protocols and program interfaces that allow an application program to make consistent changes to multiple protected resources.

z/OS, when requested, can coordinate changes to one or more protected resources, which can be accessed through different resource managers and reside on different systems. z/OS ensures that all changes are made or no changes are made. Resources that z/OS can protect include:

A hierarchical database
A relational database
A product-specific resource

This section describes how to provide resource recovery for resources on a single system and for resources distributed across multiple systems. The topics are:

Planning a resource manager lists information you need if you are thinking of providing a resource manager to work with RRS.