Operating System/400, 5769-SS1 493
Operating System/400, 5769-SS1
– Operations management functions can be performed using remote commands and
display station passthrough (within OS/400) for AS/400 controlled networks and Host
Command Facility (on S/370) to Distributed Host Command Facility (on an AS/400
system within OS/400) on S/370-controlled networks.
Database Journaling enhancements in V4R5
Database journaling is enhanced at V4R5 in several key areas:
• Maximum size of a single journal receive is increased by a factor of over 500 times to
accommodate customer’s growing environments.
• Maximum journal sequence number is increased by a factor of five.
• Number of disk drives that can be simultaneously accessed by a journal is increased
by an order of magnitude to 100.
• These enhancements reduce the hands-on operations requirements needed to
manage journals while providing greater capacity with consistent performance.
• With V4R5, it is easier to manage files logged to different journals. A single application
may access files logged to multiple journals. If the transaction adjusts data in several
journal receivers, two-phase commitment control is employed to synchronize the
information located in all receivers. If only files from a single receiver are used during
the execution of the transaction, the commitment cycle focuses only on that journal
with a single-phase commitment.
Integrated File System
The integrated file system is a part of OS/400 that lets you support stream input, output, and
storage management similar to personal computer and UNIX operating systems, while
providing structure for all information stored in the AS/400 system.
The key features of the integrated file system are:
• Support for storing information in stream files that can contain long continuous strings
of data
• A hierarchical directory structure
• A common interface that allows users and applications to access not only the stream
files, but also database files, documents, and other objects that are stored in the
AS/400 system
• A common view of stream files that are stored locally on the AS/400 system, an
Integrated NetFinity Server for AS/400, or a remote Windows NT server
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