Husky is an internal event-store DBMS built by Datadog.
Multi-version Concurrency Control (MVCC)
Husky uses multi-version concurrency control for queries by making a temporary copy of the metadata for a table at the time when a query starts.
Husky supports an optional full-text search index where administrators define which columns to index manually for each table.
Husky supports snapshot isolation by leveraging FoundationDB's existing snapshot isolation and making a temporary copy of table metadata when a query starts.
Decomposition Storage Model (Columnar)