src/Connection/Cluster/RedisCluster.php
public function buildSlotMap()
    {
        $this->slotmap->reset();

        foreach ($this->pool as $connectionID => $connection) {
            $parameters = $connection->getParameters();

            if (!isset($parameters->slots)) {
                continue;
            }

            foreach (explode(',', $parameters->slots) as $slotRange) {
                $slots = explode('-', $slotRange, 2);

                if (!isset($slots[1])) {
                    $slots[1] = $slots[0];
                }

                $this->slotmap->setSlots($slots[0], $slots[1], $connectionID);
            }
        }
    }
public function buildSlotMap()
    {
        $this->slotmap->reset();

        foreach ($this->pool as $connectionID => $connection) {
            $parameters = $connection->getParameters();

            if (!isset($parameters->slots)) {
                continue;
            }

            foreach (explode(',', $parameters->slots) as $slotRange) {
                $slots = explode('-', $slotRange, 2);

                if (!isset($slots[1])) {
                    $slots[1] = $slots[0];
                }

                $this->slotmap->setSlots($slots[0], $slots[1], $connectionID);
            }
        }
    }
Generates the current slots map by guessing the cluster configuration out
of the connection parameters of the connections in the pool.

Generation is based on the same algorithm used by Redis to generate the
cluster, so it is most effective when all of the connections supplied on
initialization have the "slots" parameter properly set accordingly to the
current cluster configuration.