solidDB

Acquired Company OLTP

solidDB is a relational "SQL Database" with persistent in-memory - and on-disk tables. It provides three different replication features: a highly automated HotStandby (HSB), asynchronous log (CRep) replication with arbitrary topologies (with/wo HSB) and a scalable cluster called the Grid. solidDB can be configured as a separate client/server, used as a library which is less need with the client, or shared as a library with multiple client processes and accessed through shared memory. Recent additions include JSON/BSON support, and vector datatype and vector indexing (with hnswlib).

HotStandby servers are controlled by distributed HA Controller processes.

Data Model

Relational

Fault Tolerance

Conflict Resolution Synchronous Replication Asynchronous Replication

HotStandby can be configured to run with fine-grained levels ranging from asynchronous to strictly synchronous replication.

Asynchronous (CRep) replication detects schema inconsistencies and conflicting updates.

Foreign Keys

Supported

Indexes

B+Tree Patricia/Radix Trie Hierarchical Navigable Small World (HNSW)

B+-tree for on-disk tables, and combination of compressed Patricia trie and cache conscious B-tree leaf level nodes. Hnswlib uses hardware optimized distance functions if the hardware supports them.