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HBase System Overview<br />

Storage<br />

Layer<br />

D<strong>at</strong>abase Layer<br />

Master Backup Master<br />

Region Server Region Server Region Server<br />

HBASE<br />

Namenode Secondary Namenode<br />

D<strong>at</strong>anode<br />

D<strong>at</strong>anode D<strong>at</strong>anode<br />

HDFS<br />

. . .<br />

ZK Peer<br />

ZK Peer<br />

. . .<br />

Coordin<strong>at</strong>ion<br />

Service<br />

. . .<br />

Zookeeper Quorum

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