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Realtime Apache Hadoop at Facebook

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<strong>Apache</strong> HBase<br />

▪ Originally part of <strong>Hadoop</strong><br />

▪ HBase adds random read/write access to HDFS<br />

▪ Required some <strong>Hadoop</strong> changes for FB usage<br />

▪ File appends<br />

▪ HA NameNode<br />

▪ Read optimiz<strong>at</strong>ions<br />

▪ Plus ZooKeeper!

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