Constraints

This topic describes limits on the node quantity of a CSS cluster. For details about the limits and limitations of different features provided by CSS, see relevant topics in the CSS User Guide.

Maximum and Minimum Numbers of Nodes in a Cluster

The following tables provide the maximum and minimum numbers of nodes each CSS cluster can have.

**Table 1** Maximum and minimum numbers of nodes in an Elasticsearch or OpenSearch cluster
Number of Nodes	Limit
Maximum number of nodes in a cluster
Minimum number of nodes in a cluster	1

**Table 2** Maximum and minimum numbers of nodes in a Logstash cluster
Number of Nodes	Limit
Maximum number of nodes in a cluster	100
Minimum number of nodes in a cluster	1

Quotas

CSS uses the following resource quotas:

Number of instances
CPUs
Memory capacity in GB
Number of disks
Disk size (GB)

For details about how to check and modify quotas, see Quotas.

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