incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Patrick Julien <pjul...@gmail.com>
Subject Re: Pyramid Organization of Data
Date Sat, 09 Apr 2011 01:03:06 GMT
thank you, I get it now.

On Fri, Apr 8, 2011 at 7:15 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
> 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
>

Mime
View raw message