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Some additional nuggets by ScyllaDB co-founder: - Discord couldn't complete repair with Cassandra. Not the case with Scylla - Scylla has a lot in common with Cassandra, from a good…

Most users of ScyllaDB/Cassandra use quorum or local_quorum

My understanding is that the new Rust coalescing will make the situation on-par with the new go driver. However, in the second part of the blog there is a no-coalescing test where …

GSI, LSI are fully supported already. Backup is fully supported too (but not identical to DynamoDB). TTL is in final development mode. So yes, everything is planned to be fully sup…

Shard per core has challenges. Scylla solves it partially by making the client shard aware (topology aware), so the client submits requests directly to the right cpu core using a d…

At Scylla we initially defined a new filesystem which adheres shard-per-core and thus a single physical hyperthread has the sole access to the data and thus there is no contention.…

Seastar.io is another one, it's an async engine that utilizes all of the cores in a modern system and is the heart of Scylla's DB. However, it's complex to use it correctly

The advantage of in-memory it's also its biggest disadvantage - it's costly. NVMe can serve almost as fast as ram and is 100x cheaper. Scylla offers single digit msec (usually 1mse…

We at Scylla tune the kernel, drives, stride, clock source automatically and benchmark the disk to figure out what's its maximum parallelism so it won't queue (we can saturate 8 NV…

With LSM approach (log structured merge tree) we have at Scylla, we make all the writes batched/sequential and receive an awesome boost. Some reads can be sequential too if you sca…

It's planned. However, I don't believe we'll pass it today. We're targeting GA for Jan and we'll give it our best shot.

Latency is great - http://www.scylladb.com/technology/cassandra-vs-scylla-laten... and we promise to improve it further. The client API is CQL. We have thrift too but it's not matu…