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The "HadoopIsNot" page has been changed by SteveLoughran. The comment on this change is: remove xref from a title. http://wiki.apache.org/hadoop/HadoopIsNot?action=diff&rev1=5&rev2=6 -------------------------------------------------- Because of these limitations, if you want a secure filesystem that is always available, HDFS is not yet there. You can run Hadoop MapReduce over other filesystems, however. - == [HDFS] is not a Posix filesystem == + == HDFS is not a Posix filesystem == The Posix filesystem model has files that can appended too, seek() calls made, files locked. Hadoop is only just adding (in July 2009) append() operations, and seek() operations throw away a lot of performance. You cannot seamlessly map code that assumes that all filesystems are Posix-compatible to HDFS.
