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From Radim Kolar <>
Subject Re: Cassandra cluster HW spec (commit log directory vs data file directory)
Date Sun, 30 Oct 2011 22:47:37 GMT
Dne 30.10.2011 23:34, Sorin Julean napsal(a):
> Hey Chris,
>  Thanks for sharing all  the info.
>  I have few questions:
>  1. What are you doing with so much memory :) ?
cassandra eats memory like there is no tomorrow on large databases. It 
keeps some structures in memory which depends on database size.

  2. What your network speed ? 100 mbit is failure

3. Do you have a dedicated VLAN for gossip/store traffic ?
We share hadoop + cassandra on VLAN due to low budget. It is best to 
have them separated. Hadoop is very heavy on network.

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