Ops: Aggregator Failures
Master Aggregator Dies
If the master aggregator dies and is recoverable, all that is necessary is to restart the SingleStoreDB process.
If it is not recoverable, then a child aggregator must be promoted to master with AGGREGATOR SET AS MASTER.
One Child Aggregator Dies
If the aggregator is recoverable, all that is necessary is to restart the SingleStoreDB process. Otherwise, simply deploy a new SingleStoreDB instance as an aggregator.
Many Aggregators Die
If more than one aggregator dies, they can be reintroduced or replaced one by one.