hadoop - how to find rack id of a host in java programming language -


Сan body tell me if not provide rack-awareness configuration hadoop, hadoop rack-awareness work or not. basic purpose know, hadoop able know rack id system directly or have provide threw file.

also there way in java fetch rack id system. sorry if silly question don't know how rack system works

hadoop has configured rackawareness script figure out machine rack mapping. without configuration can't figure on it's own. more information rackawareness here , sample script here. script takes machine/node input , returns rack belongs to.


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