Hello everyone,
As you can see in the
documentation comparing SSD and HDD, HDD provides the ability to store more of your data, longer and at lower cost, but given its lower throughput cap and higher latency, it's best suited for batch and analytics workloads which are not latency sensitive, particularly if you're storing > 10TB of data.
SSD storage remains recommended for most workloads, particularly those with requirements for high throughput or real-time, low-latency access.
Misha Brukman
on behalf of the entire Cloud Bigtable team