I saw the blog below. I have a question.
1) Does not require doubling the disk or memory use of the table while executing (creating a 2nd copy of the table without destroying the original table is not allowed)
MemSQL is the only distributed relational database able to achieve all three. For example, MySQL Cluster fails to do (1) – it copies the table in many cases.
2) Does not lock the table or prevent querying it for long periods of time (read or write) while running (under a second of blocking queries is OK)
Is this the only characteristic of MemSQL? What is the difference from other DBs (especially Oracle)? I want to know about the DBs with this characteristic.