An ordinary PC can accommodate 4TB of data easily. But it is a SPOF, has slow I/O, the network card is probably slow as well. I mean if that was the case then

An ordinary PC can accommodate 4TB of data easily. But it is a SPOF, has slow I/O, the network card is probably slow as well. I mean if that was the case then ELK stacks would not be running in cluster mode. There many 3-Node ELKs handling less than 4 TB of data efficiently where one could not. By efficiently I mean, not having time for Coffee while waiting for Kibana to load the graphs...