16.The recommendation is to develop a DB2 system libraries configuration that allows each DB2 subsystem to be migrated to a new level of DB2, or DB2 maintenance, individually. For instance, if this is a DB2 data sharing group, you want to migrate members one at a time. The system libraries include SDSNLOAD, SDSNEXIT, SDSNMACS, SDSNSPFP, etc. The RUNLIB.LOAD, DBRMLIB.DATA and SRCLIB. DATA libraries are groups level libraries and are changed when the first data sharing member is migrated to a new DB2 version or maintenance level.

This can be accomplished two ways:

1.Each DB2 subsystem, or data sharing member has their own set of system libraries, and when maintenance, or migration to a new level of DB2 takes place.the new SMP/E libraries are copied into the system libraries of the DB2 subsystem being updated.

2.Maintain a N and a N+1 copy of the system libraries. In this case, the PROCs for the DB2 subsystem that is being updated would be changed to point to the N+1 level of system libraries. You would still maintain separate SDSNEXIT libraries for each subsystem or data sharing member.

17.Review DB2 virtual storage considerations in Chapter 5 of the SAP Database Administration Guide for SAP NetWeaver on IBM DB2 UDB for z/OS. It is important to folow the guidelines on estimating the use of virtual storage below the 2GB bar because in DB2 V8 there are memory structures that exist below this bar. For DB2 9 the procedure for estimating virtual storage requirements nelow the 2GB bar is described in the document ‘SAP on IBM DB2 for z/OS: Best Practice for Installing or Migrating to DB2 9’.

18.For Online Reorg use normal SHRLEVEL CHANGE parameters plus the following:

MAXRO 10

(maximum time for last iteration)

TIMEOUT TERM

(if utility times out then terminate)

DRAIN ALL

(readers and writers during final phase , prevents deadlocks)

LONGLOG DRAIN DELAY 0

DRAIN_WAIT 120

RETRY 10

RETRY_DELAY 120

Copyright 2006 IBM Solutions Technical Sales (STS)

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IBM DB2 9, DB2 V8 manual Maxro, Timeout Term, Drain ALL, Longlog Drain Delay Drainwait Retry Retrydelay

DB2 V8, DB2 9 specifications

IBM DB2 is a family of data management products that provide powerful capabilities for managing large amounts of data. Among its various versions, DB2 9 and DB2 V8 stand out due to their advanced features and technologies that cater to both enterprise needs and modern database requirements.

DB2 9, also known as "Viper," was a significant release that brought substantial enhancements to the database management system. One of its standout features is its support for XML data. This version introduced a native XML storage architecture, allowing users to store, retrieve, and manage XML data efficiently. The advanced query capabilities for XML data made it easier to integrate both structured and unstructured information into applications.

Another notable aspect of DB2 9 is its enhanced security features. It introduced features like label-based access control, ensuring that sensitive data could be properly managed according to the security policies of an organization. This version also included a transparent data encryption mechanism, protecting data at rest without impacting performance.

DB2 V8, released prior to DB2 9, presented several key features that had a lasting impact on database technology. One of its major advancements was the introduction of pureXML, which laid the groundwork for handling XML data. DB2 V8 also provided improved performance through enhancements such as table partitioning, which allowed for more efficient data organization and retrieval.

Additionally, DB2 V8 emphasized high availability and disaster recovery, incorporating features like DB2 HADR (High Availability Disaster Recovery). This allowed organizations to ensure data continuity even in the event of system failures, a critical aspect for enterprise environments that rely on uninterrupted access to their data.

Both versions of DB2 leveraged advanced technologies such as multi-version concurrency control (MVCC), which enhanced transaction integrity and performance. Their ability to support various platforms, including Linux, UNIX, and Windows, demonstrated IBM's commitment to providing flexible solutions tailored to different environments.

In summary, both IBM DB2 9 and DB2 V8 established a strong foundation in the database management ecosystem. With features focused on XML data management, enhanced security, performance improvements, and high availability, these versions have equipped organizations with the tools necessary to handle contemporary data challenges efficiently and effectively. Their legacy continues to influence database technology today, highlighting IBM's enduring impact on data management solutions.