HBase
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HBase is called the Hadoop database because it is a NoSQL database that runs on top of Hadoop. This blog is about Apache HBase, the open source, distributed key value store.
HBase
4y ago
By Lars Hofhansl Why Local Indexes? Local indexes are a powerful tool in the HBase/Phoenix toolbox. They are (1) naturally and cheaply transactional, they (2) avoid creating extra index tables, (3) provide the best write write performance, and (4) they can small since they work uncovered in all cases (i.e. you do not have to include extra columns so that a query can be answered from only the index). Problems with Local Indexes?Local indexes work by maintaining an index per HBase region, each region has its own local index. At read-time, for a query along the index that means that each regi ..read more