We are currently estimating the amount of ssd storage we need to acquire to support a dataset of size x in gigabytes. In the docs and this forum we found multiple statements:
defrag-lwm-pct should not be set above ~50% to avoid write amplification
You should not exceed 50-60% capacity on your SSDs.
Our question: Do we make any mistake when estimating that we need around 4x hardware capacity (usage of 50% with worst case usage of 51% per block) with no replication and 8x with 1 replication or should these 2 statements been seen as a 2x ?
What will happen below that ratio, will only latency and write-amplification increase or also throughput decrease? If so, how badly?