Large Oracle RAC Databases Performance on MPP Machines

Feb. 12, 2012 - PRLog -- In contrast to the group, with only a few nodes are connected to large parallel processing (MPP) systems to be connected with all nodes. There are thousands of nodes, MPP systems. Each of these nodes is an independent system has its own processor, hard drive, memory controller and an internal bus system "in general terms," shared nothing architecture. All these nodes are by using a rapid means for the band. Each node has its own copy of the operating system. MMP is installed in the architecture of Oracle RAC mode.

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Each Oracle instance for each node is responsible for all means, read the entire database and find out which node is the lock on the database. If this is something that is locked by another node is needed, i.e., between the anti-dumping cases are to be saved on disc one, after the changes. Request a typical database would violate a node, the data from memory or hard disk to be loaded, while the corresponding node, and returns through a data connection to the requesting node. Each node maintains its own set of wheels and can be controlled in another, when a node fails. Therefore, all nodes are configured in a combination of primary or primary and secondary school. The database files are located in priority areas, taking the central node and redundancy necessary to take the place of the primary tumor on the left.

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The main drawback of the MPP architecture is not architecture per se, but a typical application is to design defects. Application developers also have experience in implementing programs on the machine skimmed milk. However, the MPP architecture requires a paradigm shift in the nodes exchange data and data analysis, such as reducing ping nodes. Because each node has a share nothing architecture independent, each situation, the node acts as a source of information exchange with heavy traffic on the link to work. This creates serious problems for Oracle RAC. Running Oracle RAC is bad depends on your hardware architecture. You must answer the hardware architecture and operating system deployment, pretreatment of Oracle Application Cluster configuration really considered. Otherwise, there will be plenty of problems and use materials from their database stops high.

Sometimes large systems are working wonderfully while using massively parallel processing MPP. But under some circumstances it doesn’t provide any kind of performance boost due to system architecture is different and not supported for OLTP database server. Of course, in some scenarios, like decision support system or data warehousing it provides best results.

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