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  1. Hadoop Map/Reduce
  2. MAPREDUCE-3289

Make use of fadvise in the NM's shuffle handler

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      Using the new NativeIO fadvise functions, we can make the NodeManager prefetch map output before it's send over the socket, and drop it out of the fs cache once it's been sent (since it's very rare for an output to have to be re-sent). This improves IO efficiency and reduces cache pollution.

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        1. 3289-1.txt
          3 kB
          Todd Lipcon
        2. 3289-2.txt
          4 kB
          Todd Lipcon
        3. MAPREDUCE-3289.branch-1.patch
          4 kB
          Brandon Li
        4. MAPREDUCE-3289.branch-1.patch
          4 kB
          Brandon Li
        5. MR3289_trunk_2.txt
          13 kB
          Siddharth Seth
        6. MR3289_trunk_3.txt
          13 kB
          Siddharth Seth
        7. MR3289_trunk.txt
          9 kB
          Siddharth Seth
        8. mr-3289.txt
          5 kB
          Todd Lipcon

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              tlipcon Todd Lipcon
              tlipcon Todd Lipcon
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