[dominotw]

> If you surveyed most NewSQL databases today, most of them are built on top of an LSM, namely, RocksDB.

Is this actually true?

spark, foundationdb, memsql, nuodb , citus . I am not sure any of these are built on top of rocksdb.

Which ones are actually built on lsm?

[manigandham]

None of those are newsql other than MemSQL, which is an OLAP system that uses a custom rowstore format and parquet for columnstores.

In addition to CockroachDB there's also TiDB which runs on top of TiKV which uses RocksDB.

[dominotw]

> None of those are newsql other than MemSQL

Why aren't citus, nuodb 'newsql'?

> there's also TiDB

One more example doesn't qualify the statement "most are built on rocksdb". I wasn't saying there is only one newsql db built on rocksdb.

Of the 14 examples listed here https://en.wikipedia.org/wiki/NewSQL

only 2 that you mentioned seem to be built on rocksdb.

[manigandham]

I'm not disagreeing, RocksDB is not used by most. The statement in the blog post is not true.

[nindalf]

Cassandra, MongoDB, BigTable, InfluxDB, LevelDB.

[dominotw]

> Cassandra, MongoDB, BigTable, InfluxDB, LevelDB.

None of these are NewSql[1](ACID and SQL) though.

1. https://en.wikipedia.org/wiki/NewSQL