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Hadoop, mail # user - rack awareness and safemode


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rack awareness and safemode
Patai Sangbutsarakum 2012-03-20, 20:20
Hadoopers!!

I am going to restart hadoop cluster in order to enable rack-awareness
first time.
Currently we're running 0.20.203 with 500TB of data on 250+ nodes
(without rack-awareness)

I am thinking and afraid that when i start dfs (with rack-awareness
enable) the HDFS will be in safemode for hours
busy with relocating block to comply with rack-awareness.

Anything knob i can dial to prevent that ?

Thanks in advances
Patai
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John Meagher 2012-03-20, 20:27
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Patai Sangbutsarakum 2012-03-20, 20:38
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Harsh J 2012-03-20, 21:44
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Patai Sangbutsarakum 2012-03-20, 23:19
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Patai Sangbutsarakum 2012-03-22, 17:36
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John Meagher 2012-03-22, 17:40
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Patai Sangbutsarakum 2012-03-22, 17:55