HDFS and GPFS, CSM and xCAT difference ?

1, HDFS and GPFS What is the difference ? After a post- how to build GPFS deployment HDFS?
2, CSM and xCAT What is the difference ? xCAT is not to build on the CSM ?
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1. distributed File System Hdfs (Hadoop Distributed File System)
parallel file system cluster GPFS (General Parallel File System)
HDFS using the master / slave architecture. An HDFS cluster is composed of a certain number of Datanodes Namenode and composition .
2. This is not clear .
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learned
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  This reply was moderator deleted at 2011-07-26 13:14:42

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how to understand the master / slave architecture with Namenode / Datanode architecture ? Whether on a cluster system to explain ? Thank
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distributed File System Hdfs (Hadoop Distributed File System)
parallel file system cluster GPFS (General Parallel File System)

learn about
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  This reply was moderator deleted at 2011-07-30 10:22:55

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learn about