IBM Directory Maintenance for z/VM (DirMaint)Updated: 2022-09-16
| 09-16-2022: updated to add information on DirMaint FL730
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IBM Directory Maintenance (DirMaint) for z/VM is a CMS application that helps manage an installation's VM directory. Directory statements can be added, deleted, or altered using the DirMaint directory statement-like commands. DirMaint provides automated validation and extent allocation routines to reduce the chance of operator error. [ More ]
With z/VM V7, DirMaint is a priced, optional feature and is automatically shipped on the z/VM V7 base product media: See the announcement letter for further details, z/VM 7.3.
The priced, optional feature of the IBM Directory Maintenance
Facility (DirMaint) has released a new function level (FL730) in
z/VM V7.3. DirMaint FL730 includes all service applied since
FL720 plus support is added for the z/VM upgrade installation
procedure exit (UPGDVHXT EXEC). This exit provides the
interface between the z/VM upgrade installation procedure and
DirMaint so that DirMaint can be used for all of the directory
updates associated with the upgrade installation. In order for
this exit to work successfully, some DirMaint configuration is
necessary. If you plan to use the z/VM upgrade installation
procedure with DirMaint, please see Appendix C. Preparing for
the z/VM Upgrade Installation Procedure
The Directory Maintance Facility (DirMaint), function level 730, is updated for Eight-Member SSI Support.
This support increases the maximum size of a single system image (SSI) cluster from four members to eight, enabling clients to grow their SSI clusters to allow for increased workloads and providing more flexibility to use Live Guest Relocation (LGR) for nondisruptive upgrades and workload balancing.
The DirMaint DIRECTORY command is updated for this new support.
NOTE: The support added by the following z/VM Continuous Delivery New Function APARs for DirMaint are available in the base support for DirMaint FL730.
z/VM Continuous Delivery New Function APARs for DirMaint FL720
APAR VM66175 - DirMaint Health Checker; INFO APAR II14866; APAR VM66273
While 'Health Checker' is a bit of a misnomer, the support added with these APARs creates an initial verification program (IVP) for DirMaint which is run automatically daily and on demand using the DIRM IVP command. The IVP runs a set of tests which look at the setup of the DirMaint servers as well as specific files, etc, in the running servers and warns the user via the IVP status file when errors are found.
For more information, please see the documentation for the DIRM IVP command in the DirMaint Commands Reference and the following in the DirMaint Tailoring and Administration Guilde:
Chapter 3. Tailoring the DIRMAINT Service Machine, Step 6. Select IVP Characteristics under 'CONFIG DATADVH'.
Chapter 11. "Installation Verification Procedure (IVP)"
Appendix G. Tests run by the Automated IVP. Please note this section includes a list of the tests that are run along with a description of error/warnings received and steps you can take to correct any errors/warnings found.
APAR VM66298 - DirMaint Performance Enhancements
The performance improvements to DirMaint include the processing of user and server requests. Also, additional tests related to performance and reliability are added to the automated IVP introduced in the VM66175 new function APAR listed above.
- z/VM V7.3 library
- z/VM V7.2 library
- z/VM V7.1 library
- z/VM V6.4 library
- z/VM V6.3 library
- z/VM V6.2 library
- z/VM V5.4 library
- Command Set Summary for DirMaint: ALL.
Program Directories for DirMaint:
Obtaining service Online Support for z/VM where you can:
DirMaint service can be ordered on-line at IBM Shopz "Ordering Service" with ordering information tips available here.
Instructions for testing service.
Hints and Tips
- Cross System Extension (CSE) information.
- How to free a stalled DATAMOVE machine.
- Requirements and requisites when using DFSMS minidisk management functions.
- Correcting DIRM PW? command problems.
- No, encryption of the directory is not required.
- Performance tips.
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