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From Michael Kjellman <>
Subject Re: Unavaliable Exception
Date Fri, 25 Jan 2013 15:59:55 GMT
More nodes!

On Jan 25, 2013, at 7:21 AM, "Alain RODRIGUEZ" <<>>

fwiw, I have a mixed ubuntu 11.10 / 12.04 6 node cluster (AWS m1.xlarge).

The load average is always between 0 and 5 for 11.10 nodes while 12.04 nodes shows all the
time a load between 2 and 20.

I have the same configuration on each node and the average request latency is a few better
on 12.04 nodes (which have the higher load).

htop shows about the same cpu used for any of these nodes so does iostat (same iowait, user,

I am not sure why this load increase, but I am not sure either that this is a problem.


2013/1/25 Everton Lima <<>>
I was storing many data in a cluster of 7 nodes with replication factor 3.
The variable Load(cpu), that can be viewed in

opscenter -> cluster -> List view

is upping over than 15.

Is there any manner to minimize this?


Everton Lima Aleixo
Bacharel em Ciência da Computação pela UFG
Mestrando em Ciência da Computação pela UFG
Programador no LUPA

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