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HBase Coprocessor 剖析与编程实践

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Release: 2016-06-07 17:56:43
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1.起因(Why HBase Coprocessor) HBase作为列族数据库最经常被人诟病的特性包括:无法轻易建立二级索引,难以执行求和、计数、排序等操作。比如,在旧版本的(0.92)Hbase中,统计数据表的总行数,需要使用Counter方法,执行一次MapReduce Job才能得到。虽然HBa

1.起因(Why HBase  Coprocessor)

HBase作为列族数据库最经常被人诟病的特性包括:无法轻易建立“二级索引”,难以执行求和、计数、排序等操作。比如,在旧版本的( 2.灵感来源( Source of Inspration)

HBase协处理器的灵感来自于Jeff Dean 09年的演讲( P66-67)。它根据该演讲实现了类似于bigtable的协处理器,包括以下特性:

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