> With the wal redis runs with perfectly reasonable performance. Of course you're not going to have the performance of an in-memory only DB if you're flushing to disk on every write.

But that's not what gets benchmarked against.

> You'll never get that kind of performance with other databases because they intentionally don't give you that granularity.

Okay but you also won't get horizontal scaling while maintaining consistency in Redis.

> The metadata of the filesystem isn't the performance bottleneck in most cases.

Okay, but they do show that other metadata stores are 2-4x slower than Redis, so it would be great to see whole-system benchmarks that use those.