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HBase Internals: HFile Explained

Matteo Bertozzi explains the HBase HFile:

HFile doesn’t know anything about key and value struct/type (row key, qualifier, family, timestamp, …). As Hadoop’ SequenceFile (Block-Compressed), keys and values are grouped in blocks, and blocks contains records. Each record has two Int Values that contains Key Length and Value Length followed by key and value byte-array.

HBase HFile

Original title and link: HBase Internals: HFile Explained (NoSQL databases © myNoSQL)

via: http://th30z.blogspot.com/2011/02/hbase-io-hfile.html