How to Create Redis Database Clusters

Redis is an open source, key-value database built with an in-memory design that emphasizes speed. It has support for rich data types, atomic operations, and Lua scripting.

You can create a Redis database cluster at any time from the Create menu by selecting Databases. This takes you to the Create a Database page.

In the create menu, click Databases to open the database cluster creation page. This is where you choose your database cluster’s configuration, like the number and size of nodes and the datacenter region.

Choose a datacenter

In the Choose a datacenter section, select the datacenter for your database cluster.

This page lists the datacenters in which you currently have the most resources. The number of resources you have in each datacenter is listed to the right as X resources. Hover over this text to see the specific resources you have in that datacenter.

For the best performance, create your database in the same datacenter as your other DigitalOcean resources. After creation, you can relocate your cluster to another datacenter.

Note

Each region has one or more datacenters, each with a different VPC network. By including resources in the same datacenter, they all gain access to the same private networking interface, which reduces lag and keeps traffic between them from being routed over the public internet.

Choose a database engine

In the Choose a database engine section, choose Redis.

We currently support Redis 6. You cannot change the Redis version after creating a cluster.

Choose a cluster configuration

In the Choose a cluster configuration section, select the machine type and the number and size of the database nodes. Each option lists its combined monthly cost, equivalent hourly cost, and node specifications. For more options, click Additional product plans.

If you select any node plan besides the smallest (1 vCPU / 1 GB RAM / 10 GB SSD), you can also add up to one standby node to your cluster. Standby nodes ensure that your data stays available by giving your cluster high availability and failover.

Redis has memory overhead requirements, so the amount of available, usable memory in Redis nodes is less than their total amount of memory. For a chart of usable memory per plan, see Redis memory usage.

You can increase the number or size of database nodes at any time. However, because of data integrity risks, you cannot downsize nodes.

Note

On Redis, each CPU in your cluster can handle up to 200 new connections per second. Any additional connection attempts within the second will fail and users must try again.

To work around this limitation, we recommend using connection pooling, which caches database connections and improves performance. DigitalOcean Redis clusters do not support connection pooling natively; however, most clients used to connect to Redis do. Alternatively, you can resize your database clusters to add more CPUs.

Finalize and Create

In the last section, Finalize and Create, choose the name for the cluster, the project to add it to, and any tags you want to use.

There are three sub-headers in this section:

• Choose a name: You can leave the automatically-generated name for the database or choose a custom name. Names must be unique, be between 3 and 63 characters long, and only contain alphanumeric characters, dashes, and periods.

• Select a project: You can leave the default project or choose another one.

• Tags: You can add a tag by typing it into the text box and pressing enter. Tags can only contain letters, numbers, colons, dashes, and underscores.

After creation, you can always edit the database’s tags or move it to another project; however, its name cannot be changed.

When you’re ready, click the Create a Database Cluster button.

Clusters typically take five minutes or more to provision, but you can complete important configuration tasks such as restricting inbound connections while you wait.