cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
Subject RE: Problems after trying a migration
Date Fri, 20 Mar 2015 09:44:40 GMT
Hi Jan,

Thank you for your help, we’ll see during next week.

Have a nice day.

Best regards,




T : +33 411 934 200<>

ZAC Aéroport

125 Impasse Adam Smith

34470 Pérols - France<>


De : Jan []
Envoyé : jeudi 19 mars 2015 05:09
À :
Objet : Re: Problems after trying a migration

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 time
c)            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 time
f)             After all the nodes in France are down,  conduct a 'nodetool repair -parallel'
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 <<>>

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.


View raw message