接口 org.apache.hadoop.hbase.io.HeapSize的使用 (Apache HBase

使用HeapSize的程序包
程序包	说明
org.apache.hadoop.hbase
org.apache.hadoop.hbase.io
org.apache.hadoop.hbase.io.hfile

org.apache.hadoop.hbase中HeapSize的子接口
限定符和类型	接口和说明
`interface`	`Cell` The unit of storage in HBase consisting of the following fields: 1) row 2) column family 3) column qualifier 4) timestamp 5) type 6) MVCC version 7) value Uniqueness is determined by the combination of row, column family, column qualifier, timestamp, and type.
`interface`	`ExtendedCell` Extension to `Cell` with server side required functions.
`interface`	`RawCell` An extended version of cell that gives more power to CPs

实现HeapSize的org.apache.hadoop.hbase中的类
限定符和类型	类和说明
`class`	`ByteBufferExtendedCell` This class is a server side extension to the `Cell` interface.
`class`	`ByteBufferKeyOnlyKeyValue` This is a key only Cell implementation which is identical to `KeyValue.KeyOnlyKeyValue` with respect to key serialization but have its data in the form of Byte buffer (onheap and offheap).
`class`	`ByteBufferKeyValue` This Cell is an implementation of `ByteBufferExtendedCell` where the data resides in off heap/ on heap ByteBuffer
`class`	`IndividualBytesFieldCell`
`class`	`KeyValue` An HBase Key/Value.
`static class`	`KeyValue.KeyOnlyKeyValue` A simple form of KeyValue that creates a keyvalue with only the key part of the byte[] Mainly used in places where we need to compare two cells.
`class`	`NoTagsByteBufferKeyValue` An extension of the ByteBufferKeyValue where the tags length is always 0
`class`	`NoTagsKeyValue` An extension of the KeyValue where the tags length is always 0
`class`	`SizeCachedKeyValue` This class is an extension to KeyValue where rowLen and keyLen are cached.
`class`	`SizeCachedNoTagsKeyValue` This class is an extension to ContentSizeCachedKeyValue where there are no tags in Cell.

接口的使用org.apache.hadoop.hbase.io.HeapSize