the table. The
data will get written to all the proper, new nodes.
Sean Durity
From: Pradeep Chhetri
Sent: Tuesday, September 18, 2018 1:55 AM
To: user@cassandra.apache.org
Subject: [EXTERNAL] Re: Adding datacenter and data verification
Hi Eunsu,
By going through the documentation, I think you
Hi Eunsu,
By going through the documentation, I think you are right, you shouldn't
use withUsedHostsPerRemoteDc because it will contact nodes in other
datacenters. No i don't use withUsedHostsPerRemoteDc, but instead i use
withLocalDc option.
On Tue, Sep 18, 2018 at 11:02 AM, Eunsu Kim wrote:
Yes, I altered the system_auth key space before adding the data center.
However, I suspect that the new data center did not get the system_auth data
and therefore could not authenticate to the client. Because the new data center
did not get the replica count by altering keyspace.
Do your client
Hello Eunsu,
I am also using PasswordAuthenticator in my cassandra cluster. I didn't
come across this issue while doing the exercise on preprod.
Are you sure that you changed the configuration of system_auth keyspace
before adding the new datacenter using this:
ALTER KEYSPACE system_auth WITH RE
In my case, there were authentication issues when adding data centers.
I was using a PasswordAuthenticator.
As soon as the datacenter was added, the following authentication error log was
recorded on the client log file.
com.datastax.driver.core.exceptions.AuthenticationException: Authenticati
Hello Alain,
Thank you very much for reviewing it. You answer on seed nodes cleared my
doubts. I will update it as per your suggestion.
I have few followup questions on decommissioning of datacenter:
- Do i need to run nodetool repair -full on each of the nodes (old + new dc
nodes) before starti
Hello Pradeep,
It looks good to me and it's a cool runbook for you to follow and for
others to reuse.
To make sure that cassandra nodes in one datacenter can see the nodes of
> the other datacenter, add the seed node of the new datacenter in any of the
> old datacenter’s nodes and restart that no
Hello everyone,
Can someone please help me in validating the steps i am following to
migrate cassandra snitch.
Regards,
Pradeep
On Wed, Sep 12, 2018 at 1:38 PM, Pradeep Chhetri
wrote:
> Hello
>
> I am running cassandra 3.11.3 5-node cluster on AWS with SimpleSnitch. I
> was testing the process
Hello
I am running cassandra 3.11.3 5-node cluster on AWS with SimpleSnitch. I
was testing the process to migrate to GPFS using AWS region as the
datacenter name and AWS zone as the rack name in my preprod environment and
was able to achieve it.
But before decommissioning the older datacenter, I
