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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Pyramid Organization of Data
Date Fri, 08 Apr 2011 23:15:09 GMT
No, I'm suggesting you have a Tokyo keyspace that gets replicated as
{Tokyo: 2, NYC:1}, a London keyspace that gets replicated to {London:
2, NYC: 1}, for example.

On Fri, Apr 8, 2011 at 5:59 PM, Patrick Julien <pjulien@gmail.com> wrote:
> 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
>>
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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