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From "Konstantin Naryshkin" <>
Subject Re: Configuring multi DC cluster
Date Thu, 15 Sep 2011 15:28:50 GMT
Wait, his nodes are going SC, SC, AT, AT. Shouldn't they go SC, AT, SC, AT? By which I mean
that if he adds another node to the ring (or lowers the replication factor), he will have
a node that is under-utilized. The rings in his data centers have the tokens:
SC: 0, 1
AT: 85070591730234615865843651857942052864, 85070591730234615865843651857942052865

They should be:
SC: 0, 85070591730234615865843651857942052864
AT: 1, 85070591730234615865843651857942052865

Or did I forget/misread something?

----- Original Message -----
From: "aaron morton" <>
Sent: Tuesday, September 13, 2011 6:19:16 PM
Subject: Re: Configuring multi DC cluster

Looks good to me. Last time I checked the Partitioner did not take the DC into consideration

Good luck.

Aaron Morton
Freelance Cassandra Developer

On 14/09/2011, at 8:41 AM, Anand Somani wrote:


Just trying to setup a cluster of 4 nodes for multiDC scenario - with 2 nodes in each DC.
This is all on the same box just for testing the configuration aspect. I have configured things

    • PropertyFile

        • #
default for unknown nodes default=SC:rack1
Setup initial tokens as - advised     • configured keyspace with SC:2, AT:2
    • ring looks like

        • Address Status State Load Owns Token 85070591730234615865843651857942052865
Up Normal 464.98 KB 50.00% 0 Up Normal 464.98 KB 0.00% 1 Up Normal 464.99
KB 50.00% 85070591730234615865843651857942052864 Up Normal 464.99 KB 0.00% 85070591730234615865843651857942052865

Is that what I should expect the ring to look like? Is there anything else I should be testing/validating
to make sure that things are configured correctly for NTS?


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