Hi,
Consider using this approach, replacing nodes one by one:
https://mrcalonso.com/2016/01/26/cassandra-instantaneous-in-place-node-replacement/
Regards,
Kyrill
________________________________________
From: Leena Ghatpande <lghatpa...@hotmail.com>
Sent: Tuesday, February 20, 2018 10:24:24 PM
To: user@cassandra.apache.org
Subject: Best approach to Replace existing 8 smaller nodes in production
cluster with New 8 nodes that are bigger in capacity, without a downtime
Best approach to replace existing 8 smaller 8 nodes in production cluster with
New 8 nodes that are bigger in capacity without a downtime
We have 4 nodes each in 2 DC, and we want to replace these 8 nodes with new 8
nodes that are bigger in capacity in terms of RAM,CPU and Diskspace without a
downtime.
The RF is set to 3 currently, and we have 2 large tables with upto 70Million
rows
What would be the best approach to implement this
- Add 1 New Node and Decomission 1 Old node at a time?
- Add all New nodes to the cluster, and then decommission old nodes ?
If we do this, can we still keep the RF=3 while we have 16 nodes at a
point in the cluster before we start decommissioning?
- How long do we wait in between adding a Node or decomissiing to ensure
the process is complete before we proceed?
- Any tool that we can use to monitor if the add/decomission node is done
before we proceed to next
Any other suggestion?
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