Yes it is only limited by disk usage but it does have an in-memory cache. I tested kvrocks about a year ago and don't have the benchmarks to hand anymore, but

Yes it is only limited by disk usage but it does have an in-memory cache. I tested kvrocks about a year ago and don't have the benchmarks to hand anymore, but if I remember correctly kvrocks had a ~60% performance penalty compared to Redis, but depends on your disk speeds.