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From Jan <>
Subject Re: Problems after trying a migration
Date Thu, 19 Mar 2015 04:09:02 GMT

Hi David; 
some input to get back to where you were : a) Start with the French cluster only and get
it working with DSE 4.5.1 b) Opscenter keyspace is by default RF1;   alter the keyspace
to RF3 c) Take a full snapshot of all your nodes & copy the files to a safe location
on all the nodes 
To migrate the data into new cluster: a) Use the same version DSE 4.5.1 in Luxembourg &
bring up 1 node at a time.    Check that the node has comeup in the new Datacenter.b) Bring
up new nodes into the new Datacenter one at a timec)  After all your new nodes are UP in Luxembourg,
conduct a 'nodetool repair -parallel'    d)  Check in OpsCenter that you have all your
nodes showing up (new and old)e) Start taking down your nodes in France, one at  a timef)
After all the nodes in France are down,  conduct a 'nodetool repair -parallel'  again g)
Upgrade the nodes in Luxembourg to DSE 4.6.1 h)  conduct a 'nodetool repair -parallel'  again i)
Upgrade to  OpsCenter 5.1  
Best of luck,  hope this helps. 

     On Wednesday, March 18, 2015 1:01 PM, Robert Coli <> wrote:

 On Wed, Mar 18, 2015 at 9:05 AM, David CHARBONNIER <>

-         New nodes in the other country have been installed like French nodes except
for Datastax Enterprise version (4.5.1 in France and 4.6.1 in the other country which means
Cassandra version in France and in the other country)

This is officially unsupported, and might cause of problems during this process.

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