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From Patrick Julien <pjul...@gmail.com>
Subject Re: Pyramid Organization of Data
Date Fri, 08 Apr 2011 22:59:26 GMT
I'm familiar with this material.  I hadn't thought of it from this
angle but I believe what you're suggesting is that the different data
centers would hold a different properties file for node discovery
instead of using auto-discovery.

So Tokyo, and others, would have a configuration that make it
oblivious to the non New York data centers.
New York would have a configuration that would give it knowledge of no
other data center.

Would that work?  Wouldn't the NY data center wonder where these other
writes are coming from?

On Fri, Apr 8, 2011 at 6:38 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
> On Fri, Apr 8, 2011 at 12:17 PM, Patrick Julien <pjulien@gmail.com> wrote:
>> The problem is this: we would like the historical data from Tokyo to
>> stay in Tokyo and only be replicated to New York.  The one in London
>> to be in London and only be replicated to New York and so on for all
>> data centers.
>>
>> Is this currently possible with Cassandra?  I believe we would need to
>> run multiple clusters and migrate data manually from data centers to
>> North America to achieve this.  Also, any suggestions would also be
>> welcomed.
>
> NetworkTopologyStrategy allows configuration replicas per-keyspace,
> per-datacenter:
> http://www.datastax.com/dev/blog/deploying-cassandra-across-multiple-data-centers
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support
> http://www.datastax.com
>

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