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From Jason Wee <peich...@gmail.com>
Subject Re: migrating from SimpleStrategy to NetworkTopologyStrategy
Date Mon, 11 Mar 2013 23:48:33 GMT
Probably also ensure port 7000 for the nodes to be reachable between nodes.

Jason


On Tue, Mar 12, 2013 at 4:11 AM, Dane Miller <dane@optimalsocial.com> wrote:

> Hi,
>
> I'd like to resurrect this thread from April 2012 -
>
> http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/migrating-from-SimpleStrategy-to-NetworkTopologyStrategy-td7481090.html
> - "migrating from SimpleStrategy to NetworkTopologyStrategy"
>
> We're in a similar situation, and I'd like to understand this more
> thoroughly.  In preparation for adding another datacenter to our
> cassandra cluster, I'd like to migrate from EC2Snitch + SimpleStrategy
> to GosspingPropertyFileSnitch + NetworkTopologyStrategy.  Here are the
> steps I'm planning:
>
> Change the Snitch
> 1. set endpoint_snitch: GosspingPropertyFileSnitch in cassandra.yaml
> 2. configure cassandra-rackdc.properties to use a single rack and
> datacenter,: rack=RAC1, dc=dc1
> 3. do a rolling restart of all nodes
>
> Change replication strategy
> 4. for all keyspaces (except system*), alter keyspace ... with
> replication = {'class' : 'NetworkTopologyStrategy', 'dc1' : 3}
> 5. run "nodetool repair -pr" on all nodes
>
> Does this look right?  Also, I'm curious whether/why step 5 is
> necessary, given the single rack configuration.
>
> Versions:
> cassandra 1.2.2
> dsc12 1.2.2-1
> Ubuntu 12.04, x86_64
> Datastax AMI
>
> Thanks!
>
> Dane
>

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