Resize Your Deployment

Elasticsearch scales to whatever capacity you need and with as many nodes as the available resources can support. If you don’t have enough available resources, add some capacity first.

To resize a deployment:

  1. Log into the Cloud UI.
  2. On the Deployments page, select your deployment.

    Narrow the list of the deployments by name, ID, or choose from several other filters. Use a combination of them to further define the list.

  3. From your deployment menu, go to the Edit page.
  4. Change the deployment configuration:

    Fault tolerance

    If the initial deployment you created uses only one availability zone, it is not fault tolerant. On a production system, enable high availability by changing your deployment to use at least two availability zones, three for mission-critical deployments. The number of instances comes from the number of zones and the type of template. Having more nodes or instances lets you scale out horizontally by adding more processing capacity to your deployment.

    Warning

    Deployments that use only one availability zone are not highly available and are at risk of data loss, if you do not configure an external snapshot repository to enable regular backups. To safeguard against data loss, you must use at least two data centers and configure an external repository for backups.

    RAM per instance

    Node and instance capacity should be sufficient to sustain your search workload, even if you lose an availability zone. Currently, half of the memory is assigned to the JVM heap. For example, on an Elasticsearch cluster node with 32 GB RAM, 16 GB would be allotted to heap. Up to 64 GB RAM and 1 TB storage per node are supported.

    A summary of your sections for each instance and the entire deployment are available for you to review before finalizing your changes.

  5. Click Save changes.

Example: From Very Small to Very Large

This example shows you how to change an existing, very basic deployment to use high availability and to add capacity.

To scale your deployment from very small to very large:

  1. Log into the Cloud UI.
  2. On the Deployments page, select your deployment.

    Narrow the list of the deployments by name, ID, or choose from several other filters. Use a combination of them to further define the list.

  3. From your deployment menu, go to the Edit page.
  4. Under Fault tolerance, select 3 zones for mission critical environments*.
  5. Under RAM per instance, select 64 GB memory / 2 TB storage.
  6. Click Save changes.

There is no downtime when adding high availability or increasing deployment capacity. Even as the configuration changes are applied, your deployment continues to handle user requests.