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From Aaron Morton <>
Subject Re: Date loading pattern with OrderPreservingPartiton
Date Thu, 29 Jul 2010 21:43:28 GMT
Yes the OPP will could give you a distribution like that.

Given that only two nodes have data, and they seem to have same amount of data. I wonder if
all your keys are falling into the key range of the last node? So with RF 2 they go to the
last and first node only.

As an experiment you could try running the nodetool loadbalance command against node 2 and
see how the distribution and tokens change. Then perhaps try against node 1.

You'll need to consider how your keys are distributed when using the OPP and set the tokens
to get the best distribution. 


On 30 Jul, 2010,at 05:09 AM, Rana Aich <> wrote:

> Hi All,
> We are working with a Cassandra Cluster consisting 3 nodes with each having storage capacity
of 0.5 Terabytes.
> We are loading the data into the cluster with OrderPreservingPartition and with Replication
Factor 2.
> The Data that has been loaded so far looks as follows:
> Address       Status     Load          Range                                      Ring
>                                              vHexMxAF1Te2bOvu                       
> Server1 Up         292.98 GB     UHYqNsmZpD8DtZvw                          |<--|
> Server3 Up         292.77 GB     ghbzYZ6U6uYQbK6g                           |   |
> Server2 Up         917 bytes       vHexMxAF1Te2bOvu                           |-->|
> As you can see the server2 is still empty, we guess it is for OrderPreservingPartion
that we are using.
> Is this an expected behavior of Cassandra?
> Raich

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