Slaves don't need ALL the partitions, they just need a few.
So we should only retain those partitions that are of interest to the slave server.
Divide the number of partitions (6) through the number of slaves (2)
That gives you 0, 1, 2, 3, 4, 5
Slave 0 : 0, 2, 4
Slave 1 : 1, 3, 5
--> slaveNumber == partitionNr % slaveCount