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Processing Performance  read, map, Low Latency “OLAP” with HBase - HBaseCon 2012

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Processing Performance  read, map, partition, combine, copy, sort, reduce, write  Read:  Scan.setCaching() (I/O ~ buffer)  Scan.setBatching() (avoid timeouts for abnormal input, e.g. 1M hits/visit)  Even region distribution across cluster (distributes CPU, I/O)  Map:  No unnecessary transformations: Bytes.toString(bytes) + Bytes.toBytes(string) (CPU)  Avoid GC : new X() (CPU, Memory)  Avoid system calls (context switching)  Stripping unnecessary data (I/O)© 2012 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential. 23

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