大数据分析全英文 (18).pdf
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1、2S1:Data storing systemData collection and modelingDistributed file systemDistributed database/data warehouseUnified Data Access Interface3S1-L2:Distributed File system-DFSPhysical storage architecture for data.Open source-HDFS Googles GFS(Google file system)have evolved into Colossus.L1L2L3L44S1-L2
2、:HDFSName nodeData nodeManage file system namespaceStore file data blockSave“file to data block to data node”mapping relationshipRealize the mapping of data blocks to the local file system of the data nodeScheduling client access to filesData blocks are stored on the local diskMetadata is stored in
3、memory for quick accessMaster SlaveBlock 128M Data is immutable5S1-L2 Process of writing data in HDFS6S1-L2 Process of reading data in HDFS7Data Storing system summaryData Acquisition/Extraction/Transforming/ModelingDistributed File Systems(HDFS/GFS/Colossus)NoSQL Database(HBase/BigTable/MongoDB/Neo4j)Unified Data Access InterfaceL1L2L3L4
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