Furthermore, both types support the reads on standby feature and can be configured for time-delayed log replay. As with the standard HADR deployment, both types of HADR standbys are synchronized with the HADR primary database through a direct TCP/IP connection. One of the databases is designated as the principal HADR standby database, with the others termed as auxiliary HADR standby databases. This enables an advanced topology where you can deploy HADR in multiple standby mode with up to three standby databases for a single primary. Multiple Standbyīeginning in DB2 v10.1,the HADR feature supports multiple standby databases. ![]() Transmission of the logs to the standbys may also be time-delayed. When a log record is "closed" (still in memory, but has yet to be written to disk on the primary), it is immediately transmitted to the HADR standby database(s). Using two dedicated TCP/IP communication ports and a heartbeat, the primary and the standby databases track where they are processing currently, the current state of replication, and whether the standby database is up-to-date with the status of the primary database. This procedure ensures that the primary and the secondary database servers are in a synchronized state. The individual log records within the log files are then transmitted to the secondary database server, where the recorded changes are replayed to the local copy of the database. DB2 AuthenticationĪll changes that take place at the primary database server are written into log files. ![]() Specifics of DB2 versions and platforms supported on Delphix are located in the DB2 Compatibility Matrix. The version numbers in DB2 are non-sequential with v10.1 and 10.5 being the two most recent releases. The same code base is also marketed without the DB2 name as IBM InfoSphere Warehouse edition. Multiple editions are marketed for different sizes of organization and uses. The current DB2 LUW product runs on multiple Linux and UNIX distributions, such as Red Hat Linux, SUSE Linux, AIX, HP/UX, and Solaris, and most Windows systems. ![]() Thus the DB2 for Linux, UNIX and Windows moniker became necessary to distinguish the common server DB2 LUW product from single-platform DB2 products. By contrast, all other DB2 products are specific to a single platform.ĭB2 LUW was initially called DB2 Universal Database (UDB), but over time IBM marketing started to use the same term for other database products, notably mainframe (z-Series) DB2. DB2 LUW is the "Common Server" product member of the DB2 family, designed to run on most popular operating systems. Sometimes called DB2 LUW for brevity, it is part of the DB2 family of database products. DB2 for Linux, UNIX and Windows is a database server product developed by IBM.
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