Host roles in Managed Service for OpenSearch
Each Managed Service for OpenSearch cluster consists of one or more host groups of the OpenSearch and Dashboards (optional) types:
-
An
OpenSearchhost group may contain hosts with the DATA or MANAGER roles.The cluster must contain hosts with both roles. If a cluster has a single
OpenSearchgroup, its hosts will have both roles. -
A
Dashboardshost group may only contain hosts with the DASHBOARDS role.
Hosts with the DATA role
Hosts with this role store one or more indexes and handle search, write, and analysis queries.
For a cluster to be highly available and covered by a service level agreement (SLA), it must have two or more hosts with the DATA role.
More on high-availability of clusters.
Use cases
- Migrating data from Elasticsearch
- Configuring an index policy in Managed Service for OpenSearch
- Configuring a cold storage policy in Managed Service for OpenSearch
- Loading data from Yandex Managed Service for OpenSearch to Yandex Object Storage using Yandex Data Transfer
- Using the yandex-lemmer plugin in Managed Service for OpenSearch
Hosts with the MANAGER role
Hosts with this role monitor the state of the cluster and manage its configuration, ensuring the performance of all OpenSearch components.
If you are using hosts with the MANAGER role, a group containing three such hosts will be added to the cluster.
If no hosts with the MANAGER role are used, make sure to assign this role to the hosts with the DATA role. However, having dedicated hosts with the MANAGER role allows you to increase the overall cluster reliability and reduce the load on hosts with the DATA role.
Hosts with the DASHBOARDS role
Hosts with this role run OpenSearch Dashboards, a data visualization tool to use in such scenarios as real-time application monitoring, threat detection, incident management, or personalized search.