IBM HPSS manual New Hpss 6.2 System Files, Testing the Metadata Conversion

•The hpss_dce_export and hpss_unix_import utilities are provided to convert DCE authorization information.

LDAP:

•Configuring LDAP is more complex than Unix.

•Managing LDAP is fairly simple and does not require regular maintenance.

•The hpss_dce_export and hpss_ldap_import utilities areprovided to convert DCE authorization information.

6.2.4. New HPSS 6.2 System Files

There are several new files in /var/hpss that the HPSS system uses which are described in the appendix titled /var/hpss files in Appendix E. The files located under /var/hpss/etc are used in providing security and communications services. Many of these files are created or modified by programs during the upgrade process. Some may require hand modifications in order to preserve the configuration settings from the previous HPSS version. Become familiar with these files before beginning the upgrade process. If problems are encountered while attempting to start the HPSS 6.2 system, the file contents should be reviewed..

6.2.5. Testing the Metadata Conversion

To minimize the downtime of a production system, we strongly recommend that sites perform a test run on a non-production system using the production metadata. The test run allows for potential issues and/or problems to be resolved prior to the metadata conversion of the production system. Additionally, the administrators will become familiar with the conversion process. Contact your HPSS customer support representative for more information on setting up a test system using the production metadata.

Sites may also practice the metadata conversion on the production system during a system maintenance period. This allows additional factors, such as system conversion load management and configuration of system resources, to be verified. However, performing this type of practice conversion requires even more detailed planning than usual to ensure that it will not interfere with the production system. Be sure to coordinate any such practice conversion with your HPSS customer support representative.

6.2.6.Estimating the Metadata Conversion Time (for 4.5 upgrades

only)

The overall amount of time required to perform a metadata conversion from HPSS 4.5 depends largely on the size of the HPSS system being converted (number of files, number of file segments, number of storage segments, number of storage subsystems, etc.). The 6.2 conversion programs are separated into three categories depending on the size and type of metadata each will convert. The categories are:

•Configuration conversion

•Subsystem conversion

•Long running conversion

The time that the configuration and subsystem conversion steps take will depend mainly on the number of catridges and the number of subsystems that the HPSS system contains. For a test HPSS system with a single subsystem containing 4,500 cartridges, the configuration conversion took about

HPSS Installation Guide	July 2008
Release 6.2 (Revision 2.0)	184