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    November 08

    IBM DB2 PureScale挑战Oracle Exadata

    ibm-pure-scale-arch2IBM在10月10日推出PureScale技术,号称能够挑战Oracle Exadata。从其白皮书看,PureScale是DB2基础上的一种改进技术,主要改进是在于采用了一种分布式缓存技术PowerHA,同时这也是一种集中式锁管理系统。PowerHA采用InfiniBand高速网络来连接所有节点和存储。当有读写冲突的时候,PowerHA可以及时通知相应的节点,响应时间在15毫秒,这样会减少进程的等待时间,提高CPU利用率。除此以外,PureScale并没有更多的信息,因此总的来看,PureScale还是在DB2这种貌似sharenothing,其实sharesomething的架构上作的局部优化,和Exadata的变化相比还是很有限的。如果没有TPCC的结果,还是很难让人信服这可以超越Oracle在事务处理方面的能力。

    但是Oracle Exadata在此前的一年销售似乎并不怎么好,这次TPCC测试的结果应该会对Exadata的销售有不小的帮助。

    更多信息:

    1. http://www-01.ibm.com/software/data/db2/9/editions-features-purescale.html
    2. http://server.csdn.net/n/20091012/4965.html

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