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How do you restore from a backup with a cassandra failover?

Solved1.47K views16th March 2023backup Cassandra Failover restore
4
Ryan Reuss [SLC] [DevOps Member]490 24th September 2020 0 Comments

When a catastrophic event occurs on a DMA failover system running Cassandra. Restoring from the backup package would require reinstalling the Primary DMA with cassandra and loading the backup. The backup package would contain configuration information for both nodes in the configuration. When rejoining the failover agent to this DMA what manual actions would need to be taken to smoothly add this back into a failover state?

I would assume doing a ‘nodetool remove node’ of the backup node would avoid conflicts of IPs already existing in the system.peers and cassandra.yaml files?

Ryan Reuss [SLC] [DevOps Member] Selected answer as best 16th March 2023

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Michiel Saelen [SLC] [DevOps Enabler]5.63K Posted 28th September 2020 0 Comments

Hi Ryan,

The current backup/restore mechanism in DataMiner takes indeed the system tables from Cassandra. Which means that the setup is also included in the backup files. As a consequence Cassandra is restored with configuration of the DB setup as well.

Towards the future this backup mechanism will change so that the backup will be independent from your DB setup (or Cassandra setup).

Ryan Reuss [SLC] [DevOps Member] Selected answer as best 16th March 2023
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