To what value should the table’s provisioned read throughput be set?
50 read capacity units
100 read capacity units
200 read capacity units
500 read capacity units
Explanations:
50 read capacity units can support 50 strongly consistent reads of 4 KB each per second. This does not meet the required 100 reads per second.
100 read capacity units can support 100 strongly consistent reads of 4 KB each per second. The items are 5 KB each, so 100 units are insufficient.
200 read capacity units can support 100 strongly consistent reads of 5 KB each per second, as each 1 read capacity unit supports 4 KB. Thus, 5 KB per item requires 1.25 RCUs, and 100 items requires 200 RCUs.
500 read capacity units would be more than necessary. It exceeds the 200 RCUs required for 100 strongly consistent reads of 5 KB.
I sort that the answer is:
200 read capacity units