The phrase has been presumably used with the meaning of having predicted that something bad will happen in the future, despite everybody else believing otherwise.

https://en.wikipedia.org/wiki/Cassandra

Yes, he told them last year that the harvest would be worse this year due to unsustainable habitat destruction and he was right.

Provided a dire warning that became a prophecy.

https://en.wikipedia.org/wiki/Cassandra_(metaphor)

And most critically, "a curse ensuring that nobody would believe her warnings".

It means he partitioned his workload across several of his peers to increase fault tolerance and throughput.