DAT 560M pres3-2.pdf - DAT 560M Big Data Cloud Computing Week 3 HDFS 1 HDFS • HDFS is the abbreviation for Hadoop Distributed File System • HDFS is

DAT 560M pres3-2.pdf - DAT 560M Big Data Cloud Computing...

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11/1/19 1 DAT 560M Big Data & Cloud Computing Week 3 HDFS 1 HDFS HDFS is the abbreviation for Hadoop Distributed File System. HDFS is a distributed file system that is fault tolerant, scalable and extremely easy to expand. HDFS is the primary distributed storage for Hadoop applications. 2
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11/1/19 2 Requirement of a big data platform Fault tolerance If a component fails, it should not affect the entire system Recoverability In the event of failure, no data should be lost Consistency The failure of one job should not affect the final result Scalability Adding load may lead to a decline in performance, not failure 3 HDFS Terabytes or Petabytes of data Larger files than NFS (Network File System) Reliable Fast, Scalable access Integrate well with Map Reduce Restricted to a class of applications 4
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11/1/19 3 HDFS versus NFS Single machine makes part of its file system available to other machines Sequential or random access PRO: Simplicity, generality, transparency CON: Storage capacity and throughput limited by single server n Single virtual file system spread over many machines n
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  • Fall '18
  • Marion Neumman

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