Hardware requirements

The hardware requirements for your High Availability Add-on (HAA) are different between development and production environments.

Development environments

Item	Minimum Requirements	Recommended
HAA Nodes	1	3+
RAM	6 GB	8 GB
Storage (default path /opt/redislabs)	10 GB	20 GB

While one node is sufficient for a development environment, three or an odd number of nodes are recommended in order to utilize the clustering features likely needed for your production environment.

Production environments

Item	Minimum Requirements	Recommended
HAA Nodes	3	3+
Cores per Node	4	8+
RAM	6 GB (15 GB for deployments)	30+ GB
Storage (default path /opt/redislabs)	75 GB	150+ GB
Network	1 G	10+ G

Note: Always maintain an odd number of nodes. This is required to obtain a quorum needed in failure and failover scenarios.

Ports

Port	Protocol	Description
1968	TCP	Default port used for internal proxy traffic.
3333-3344 36379-36380	TCP	Default port ranges used for internal cluster traffic.
8001	TCP	Used for traffic from the application to the Discovery Service, if applicable.
8443	TCP	Used for HTTPS access to the management UI.
8444,9080	TCP	Default ports used for internal nginx < - > cnm_http/cm traffic.
9081	TCP	Default port used for internal CRDB (Conflict-free Replicated Database) traffic.
8070-8071	TCP	Used for metrics exported and managed by nginx.
9443	TCP	Recommended port for REST API traffic.
10000-19999	TCP	Port range for database traffic. By default, HAA uses port 10000.
20000-29999	TCP	Port range used for internal database shards traffic.
53,5353	UDP	Used for internal DNS/mDNS traffic.
8002,8004,8006	TCP	System health monitoring.
	ICMP	Used to check connectivity between nodes.