Algorithm of distribution Map and Reduce tasks at various topology of a network

[Костарев А.Ф.]

Hi
I have claster in two datacenters

          CLUSTER
             |
    +--------+---------+
    |                  |
datacenter1        datacenter2
    |                  |
  rack1               rack1
      |                |  |
      +-a1             |  +-b1
      |                |  |
      +-a2             |  +-b3
                       |
                      rack2
                          +-b3

Cluster have file with repcica coefficient=5
All files's blocks resides on all servers of cluser.

When I work with standart MapReduce (MRv1) (called on b1) Map and 
Rediuce task runs on all servers b1, b2, b3, a1, a2
When I work with YARN (MRv2) (called on b1) Map and Reduce task runs 
only on b1, b2, b3

Can I run in YARN Map tasks on all servers?


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Консультант 1-й категории
Костарев А.Ф.