It depends, yes but ... (not discounting any of the above).
One sees a lot of 3:1 in practice due to the replication factor. If you have 3 copies of the data and the client can read from any node, you get 3x the read performance as having to have a quorum write on two out of three nodes.
To the GP, for a rough swag of what is possible out of given hardware, a combination of FIO and ACT (measures IO latency under a fixed load) is a good start.
One sees a lot of 3:1 in practice due to the replication factor. If you have 3 copies of the data and the client can read from any node, you get 3x the read performance as having to have a quorum write on two out of three nodes.
To the GP, for a rough swag of what is possible out of given hardware, a combination of FIO and ACT (measures IO latency under a fixed load) is a good start.
https://fio.readthedocs.io/en/latest/fio_doc.html
https://github.com/aerospike/act