With a replication factor of 2 (for fault tolerance), it's ~4.5 TB.
FoundationDB requires SSD drives, which the best we can get efficiently in our data center is ~670 GB of usable space (3x480GB raided).
12x670 = 8040 GB
We try to keep extra space available for node failures (FDB will immediately start replicating addition data if it notices data with less than the configured number of replicas).
Our dataset currently grows at a decent pace, so we over provision a bit as well.
FoundationDB requires SSD drives, which the best we can get efficiently in our data center is ~670 GB of usable space (3x480GB raided).
12x670 = 8040 GB
We try to keep extra space available for node failures (FDB will immediately start replicating addition data if it notices data with less than the configured number of replicas).
Our dataset currently grows at a decent pace, so we over provision a bit as well.