可是,对HBase熟悉的读者,都知道,当读取数据时,是需要先读MemStore,然后再读BlockCache的.那我们的Block越小,能放到BlockCache中的数据就越多,命中率就越高,对Scan就越友好. Block Encoding就是做这件事情的,它就是通过某种算法,对Data Block中的数据进行压缩,这样Block的Size小了,放到Block Cache中的就多了. ...
writer.appendFileInfo(DATA_BLOCK_ENCODING,onDisk.getNameInBytes()); } 代码示例来源:origin: org.apache.hbase/hbase-server assertEquals(dataBlockEncoderAlgo.getNameInBytes(),value);
List<Object[]> configurations =newArrayList<Object[]>();for(DataBlockEncoding diskAlgo : DataBlockEncoding.values()) {for(booleanincludesMemstoreTS :newboolean[] {false,true}) { HFileDataBlockEncoder dbe = (diskAlgo == DataBlockEncoding.NONE) ? NoOpDataBlockEncoder.INSTANCE :newHFileData...
importorg.apache.hadoop.hbase.io.encoding.DataBlockEncoding;//导入方法依赖的package包/类/** * Updates the current block to be the given {@linkHFileBlock}. Seeks to * the the first key/value pair. * *@paramnewBlock the block to make current */privatevoidupdateCurrentBlock...
A data block encoding method and apparatus are provided. The data block encoding method includes: determining whether a data block includes an intensive edge region, where the intensive edge region is a region including an image distortion generated by ring noise, and the data block is a data ...
Runs manner and this manner which you encode and decode and of the data which is while block the encoding and decoding device 来自 百度文库 喜欢 0 阅读量: 21 申请(专利)号: JP特願平1-504904 申请日期: 19890414 公开/公告号: JP第2752488号B2 ...
In the encoding of the data words of a block, the data words are classified into groups based on their most significant non-zero bit. Then the corresponding absolute address of each classified data word is encoded based on the absolute address of a previously encoded data word in the same ...
PURPOSE: An encoding device is provided to independently perform a stream-scrambling process after a block-scrambling process while improving a cycle of a stream encoder using a linear feedback shift register, thereby enhancing security on finally scrambled data. CONSTITUTION: A block encoder(31) per...
Encoding scheme for hand entry of binary data. Contribute to dwaite/base58block development by creating an account on GitHub.
Then, the data hider applies the adaptive block encoding technique to detect MSB bit planes where all values are ‘1’ or ‘0’. By doing so, eight block types can be classified and the indicators generated by Huffman coding are embedded into the first MSB bit plane. Meanwhile, the ...