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June 23, 2008 | Vol 3 Issue 11

 

In This Issue:

>>  
Logical or Hardware Replication: Which Is Right for You?

>>  Rochester Celebrates the 20th Anniversary of AS/400

Feature Article - Application Software
 
Logical or Hardware Replication: Which Is Right for You?

Replication is available in two generic flavors, hardware-level and logical. Yum. But which should you choose? It all depends. Or you can have it all.

By Bill Hammond

Replication is a familiar thread in the modern information technology infrastructure fabric. It serves a number of purposes, including the following:

•·    Provide for high availability (HA) and disaster recovery (DR) by creating real-time or near real-time replicas of production databases, files, system values, and applications. This is probably the most prominent replication use but certainly not the only one.

•·    Integrate applications at the data level by sharing information among application databases.

•·    Stock data warehouses and data marts by copying data into them from operational databases.

•·    Improve load balancing by creating a secondary data store that can support read-only operations. Depending on the type of replication used, this can be an automatic supplementary benefit of HA replication.


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Feature Article - Analysis
 
Rochester Celebrates the 20th Anniversary of AS/400

The event presents an opportunity for reflecting on the success of a unique platform and gives rise to the question of whether it will last another decade--or perhaps longer.

chris_smith.jpgBy Chris Smith

IBM workers in Rochester, Minnesota, and their guests from COMMON will be celebrating the 20th anniversary of the AS/400 today, a milestone that begs the question of whether the venerable architecture that so steadfastly outlasted most of IBM's early competitors will be around for another decade or longer.


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