DB2 Enterprise Server Edition

DB2 enterprise edition is the standard software that is used by many companies. It has lot of nice features that you cannot get by using workgroup server edition, express edition. It comes with pureXML that can be used for XML applications. With the recent versions of DB2 you get the autonomic computing facilities.

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Before version 9, all the memory setting at database level and instance level was manually given. But with the advent of version 9, this manual intervention is greatly reduced. You just need to set the autonomic configuration ON and DB2 does the entire memory management by itself. Another great feature with enterprise edition is high availability. HADR comes with the enterprise edition and it can be used for high availability. You have a primary and secondary node in HADR. Whenever the primary node fails, all the applications are routed to the standby server. Automatic client reroute can be used here to automate the application failover process.

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Another good feature that can be used with enterprise edition is compression. Compressing your data can help you in saving storage costs. Compression can happen at row level and if you have huge tables then you would compress them. Compression also decreases the backup time. Compression is good in I/O bound systems. DB2 workload manager can be used to allocate certain amount of resources to a process. For example, if you want to limit the CPU usage for some job then this can be achieved by using workload manager.

Enterprise edition also can be enabled for partitioning. If you have a huge database then it is not a bad idea to partition the database between several nodes. This would enhance the application performance as it does parallel processing.

DB2 Enterprise Server Edition

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Client Server Network Application Model - The Value of Enterprise Resource Planning Software

Enterprise Resource Planning is a very popular class of enterprise applications represented by such companies as Oracle, Peoplesoft, Baan and SAP. The software is comprised of various modules for managing different company departments while integrating them as well. The current application model is described as a three tiered design that describes the flow of traffic between client and servers. The application is comprised of a client software module, an application server module and a database server module. The three tiered model has the application and database modules residing on different server machines.

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There is significant performance improvement with the three tiered model since all application and database transactions can be co-located at a high speed Data Center with Gigabit campus switches. The client software is engineered to send an efficient smaller request, which is 2-3 Kbytes across a WAN link to an application server. The application server processes that request by sending a specific query to the database server, which will be on the same campus segment. The database finds the database record and returns that to the application server. The application server then sends an SQL reply with that information to the client across the WAN.

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This model was designed for the most effective utilization of circuit bandwidth, which has the most affect on company costs and application performance. As well, co-locating the application and database servers on the same campus segment and on different machines allows for scalability and performance. The campus Gigabit links at the Data Center are at least 10x faster than the WAN circuits. That and splitting the application and database modules allow for scalable databases and higher performance application servers. With both modules running on one server there would be an upper limit at which those modules would have to be separated. Future developments with ERP applications will focus on making a client software module that requires even less bandwidth than the current 3 Kbytes for a faster response time and cost effective bandwidth usage.

Client Server Network Application Model - The Value of Enterprise Resource Planning Software

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