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From Gaurav Bajaj <gauravhba...@gmail.com>
Subject Re: Backup failover with persistence
Date Sat, 15 Sep 2018 21:03:18 GMT

After step 4 above, Ignite will detect that original primary Node A is up,
so all the updates happened while Node A was down will be applied to Node A
so thay it is latest and it will marked as Primary again. Till the time
this process is completed, Node B will still be considered as primary.


On 14-Sep-2018 9:23 PM, "eugene miretsky" <eugene.miretsky@gmail.com> wrote:

> What is the process when a node goes down and then restarts?
> Say backups = 1. We have node A that is primary for some key, and node B
> that is back up.
> Node A goes down and then restarts after 5 min. What are the steps?
> 1) Node A is servicing all traffic for key X
> 2) Node A goes down
> 3) Node B starts serving all traffic for key X (I guess the clients detect
> the failover and start calling node B )
> 4) Node A comes back up
> 5) WAL replication is initiated
> What happens next? When does node A become the primary again? How are
> in-flight updates happen?

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