Features for the Image Copy function (DFSUDMP0 JCL)
The Image Copy function that is invoked by DFSUDMP0 JCL supports the features summarized in the following table.
| Feature | Description | How to enable this feature |
|---|---|---|
| Batch image copy and concurrent image copy | IMS HP Image Copy supports two types of image copy processing; batch image copy and concurrent image copy. | Invoking the Image Copy function through stand-alone DFSUDMP0 |
| Compressed image copy | A compressed image copy has the format of database records that are compressed by one of the IMS HP Image Copy compression routines. The advantage of this format is that it reduces allocation space for output image copy. | Control statements for the Image Copy function (DFSUDMP0 JCL) |
| High Performance Input/Output interface | The High Performance Input/Output (HP Input/Output or HPIO) interface reduces CPU time and usage while IMS HP Image Copy generates image copies or recovers a database. | Invoking the Image Copy function through stand-alone DFSUDMP0 |
| Database pointer check (HASH Check) | The Image Copy function can check the accuracy of database pointers while it creates image copies. By enabling the Hash Check option, you need only to take image copies instead of running pointer check utilities to verify the pointers of databases. You can reduce the number of jobs for verifying the pointers of image copies taken. | Control statements for the Image Copy function (DFSUDMP0 JCL) |
| Creating two image copies at one time | The Image Copy function can create multiple image copy data sets in one run. | Control statements for the Image Copy function (DFSUDMP0 JCL) |
| Site Default Generation utility | The Site Default Generation utility of IMS HP Image Copy sets default values for controlling IMS HP Image Copy jobs. | Setting default values (IMS compatible JCL) |
| Offloading workload to zIIP processors | IMS HP Image Copy supports the IBM® System z® Integrated Information Processor (zIIP) to offload eligible database workloads. | Invoking the Image Copy function through stand-alone DFSUDMP0 |