Runtime for ClearPath OS 2200 Software Release Announcement

Release Functionality
Database Performance Enhancements
Direct Specification of RDMS Storage Attributes
You can directly specify RDMS storage attributes controlling the allocation of space for
structures in runtime systems through Developer 3.1A, which has new Advanced RDMS
Options pages added to the Ispec and Profile Options dialog box. Frequently tuned
storage parameters can be altered for Ispecs, Conditional Profiles, Profiles, Named
Partitions, Ispec AutoIndexes and Conditional Profile AutoIndexes. Additionally, packs and
populations can be entered for AutoIndexes.
Users now have the option of directly specifying the maximum number of pages to be
used for a storage area, as well as the page size for that storage area. Previously, this
number was automatically calculated based on population and page size.
Multi-thread Installation/Reorganization
The install phase of a system generate can now be split into multiple streams, where you
can nominate the number of parallel batch jobs for its database reorganization phase. The
Multireorg feature enables OS2200 RDMS database reorganizations to run in multithread
mode, i.e. more than one split run can be started up for the database reorganization
phase. Through an option set in host Builder to use this feature, you can now specify a
number of parallel reorganization activities within a generate, in the same way that the
compile and link phases can be multi threaded. You may also spread the work among the
split runs.
Previously, if a number of structures in an OS2200 RDMS database were affected by a
generate, the previous logic would single-thread the reorganization process. This process
was time intensive if the structures involved a lot of data, increasing system down time.
Thus, this feature reduces the database reorganization time for long runs and so reduces
system down time.
Support for RDMS XRLOAD Utility (Relational Database Fast Load)
XRLOAD (Relational Database Fast Load) has been developed as an offline utility for
speedy loading of data. It allows RDMS database reorganization performance to be an
order of magnitude faster than the alternative of using RDMSMUTL, especially when very
large tables and Fastload reports are involved.
While XRLOAD does not use RDMS, UDS or Integrated Recovery, and Fastload Reports
do not support multi-table Ispecs, XRLOAD does construct database pages directly in the
proper UDS and RDMS format.
Support for KEYONLY; Commands
Using KEYONLY; commands avoids accessing a whole table when only the profile
ordinates are required. Doing so reduces I/O and therefore increases performance.
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