Changes for the first edition (GC34-6051-00)
- WebSphere MQ is the new name for MQSeries.
- The minimum level of z/OS required for WebSphere MQ for z/OS Version 5 Release 3 is OS/390 V2.9.
- WebSphere MQ is now fully integrated with the Secure Sockets Layer (SSL) protocol.
A new WebSphere MQ object called an authentication information
object has been introduced for use with SSL. You can find full details
of the SSL implementation on WebSphere MQ in the WebSphere MQ Security book.
- You can now use persistent messages with queue-sharing groups, because
they can be logged in the queue manager logs. To support the recovery of shared
queue messages, a new object called a CF structure (CFSTRUCT),
and two new WebSphere MQ commands, BACKUP CFSTRUCT and RECOVER CFSTRUCT, have been
introduced. For details of these commands, see the WebSphere MQ Script (MQSC) Command Reference.
- You can now change some queue manager parameters while the queue manager
is active, using the SET LOG, SET SYSTEM or SET ARCHIVE commands. See the WebSphere MQ Script (MQSC) Command Reference for details of these commands.
- A new event queue SYSTEM.ADMIN.CONFIG.EVENT has been introduced, which
you can use to hold configuration event messages.
- A new utility, CSQJUFMT, has been introduced, which is an active log preformat
utility. This utility is used to format active log data sets before they are
used by a queue manager. If the active log data sets are preformatted by the
utility, log write performance is improved on the queue manager's first pass
through the active logs.
- A new PAGEINFO function has been added to the CSQUTIL utility, which is
used to extract information from page sets.
- A new queue manager attribute, EXPRYINT, has been introduced, which enables
you to control how often queues are scanned for expired messages, which are
then deleted.
- A new queue manager attribute, MAXUMSGS, has been introduced, which enables
you to limit the number of messages that can be put within a single syncpoint,
replacing the DEFINE MAXUMSGS command.
- You can now use up to 16 buffer pools.
- Two new DB2 tables have been created: CSQ.ADMIN_B_STRBACKUP and CSQ.OBJ_B_AUTHINFO.
- Two of your load libraries, thlqual.SCSQMVR1 and thlqual.SCSQMVR2, must
now be in PDS-E format.
- You can now implement context security for each individual queue, or globally
using generic profiles.
- You no longer need to define a SYSTEM.CHANNEL.REPLY.INFO queue for distributed
queueing.
- This book now includes a brief definition of messages, queues, and other WebSphere MQ objects.