What should you do?

Your company uses Bigtable for a user-facing application that displays a low-latency real-time dashboard. You need to recommend the optimal storage type for this read-intensive database.

What should you do?
A . Recommend solid-state drives (SSD).
B . Recommend splitting the Bigtable instance into two instances in order to load balance the concurrent reads.
C . Recommend hard disk drives (HDD).
D . Recommend mixed storage types.

Answer: A

Explanation:

if you plan to store extensive historical data for a large number of remote-sensing devices and then use the data to generate daily reports, the cost savings for HDD storage might justify the performance tradeoff. On the other hand, if you plan to use the data to display a real-time dashboard, it probably would not make sense to use HDD storage―reads would be much more frequent in this case, and reads that are not scans are much slower with HDD storage.