Databases

Add a database from + Service → Databases. It lands on the canvas, joins the environment private network, and can inject connection strings through variables.

Every managed database can run as a single Standard instance or as a replicated, high-availability deployment. Pick the topology when you create it.

Standard vs high availability

You choose Standard or HA when you create the instance (you can raise replica count later).

Standard runs one instance and one volume. HA runs a primary plus replicas across nodes, with automatic failover.

Standard

A single instance with its own disk. Simplest and cheapest. Fine for development, internal tools, and workloads that can take a short restart. If the instance moves, the database is briefly unavailable until it comes back.

High availability (HA)

A primary plus replicas on different nodes. Writes go to the primary and stream to replicas. If the primary fails, a replica is promoted. You can also read from replicas. Use this for production.

	Standard	High availability
Instances	Single	Primary + 1 or more replicas
Node spread	One node	Replicas on separate nodes
Failover	None (restart)	Automatic primary promotion
Read scaling	Primary only	Reads can fan out to replicas
Best for	Dev, internal, non-critical	Production, uptime SLAs

Choosing a topology

Start Standard for development and switch to HA before you carry production traffic. For most engines you raise the replica or node count and StackBlaze performs a rolling change with no data loss.

Available databases

Each database is a managed service on your canvas: backups, private networking, and connection strings without extra config. The table lists engines and topologies.

Relational (SQL)

Database	Engine	Topologies
PostgreSQL	CloudNativePG	Standard + HA
MySQL	MariaDB (MySQL-compatible)	Standard + HA
CockroachDB	Distributed SQL	Standard + HA

Key-value & cache

Database	Engine	Topologies
Redis	Valkey (Redis-compatible)	Standard + HA
Memcached	Memcached	Standard only

Document

Database	Engine	Topologies
MongoDB	DocumentDB (MongoDB-compatible)	Standard + HA
CouchDB	Apache CouchDB	Standard + HA

Search & vector

Database	Engine	Topologies
OpenSearch	OpenSearch	Standard + HA
Milvus	Milvus (vector DB)	Standard + HA

Analytics

Database	Engine	Topologies
ClickHouse	ClickHouse	Standard + HA

Wide-column

Database	Engine	Topologies
Cassandra	Apache Cassandra	Standard + HA
ScyllaDB	ScyllaDB (Cassandra-compatible)	Standard + HA

One engine, the names you know

Some databases are served by a compatible engine so we can ship them under a permissive license without changing your client code. MongoDB is provided by DocumentDB (MongoDB wire protocol), Redis by Valkey, and MySQL by MariaDB. Your existing drivers, connection strings, and tools work unchanged.

See Backups & recovery for snapshot behavior across every database, plus point-in-time recovery for PostgreSQL.

Looking for messaging? Kafka and RabbitMQ are documented under Messaging.

PostgreSQLManaged Postgres with backups, PITR, and private networking.

MySQLMariaDB-compatible MySQL with automated backups.

RedisValkey-compatible Redis for cache, sessions, and queues.

MongoDBDocumentDB-compatible MongoDB with replica sets.

BackupsDaily snapshots and PostgreSQL point-in-time recovery.