Small environment note

Author: aurbiztondo-splunk

gdi/opentelemetry/deployment-modes.rst

@@ -47,7 +47,7 @@ Use the host monitoring (agent) mode when you want to do these things:
 Data forwarding (gateway) mode
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-Data forwarding (gateway) mode is typically deployed per cluster, data center, or region. The Collector in gateway mode collects data from one or more Collectors running in standalone agent mode and sends it to Splunk Observability Cloud. For the default gateway config file see :new-page:`data forwarding (gateway) mode configuration in GitHub <https://github.com/signalfx/splunk-otel-collector/blob/main/cmd/otelcol/config/collector/gateway_config.yaml>`.
+Data forwarding (gateway) mode is typically deployed per cluster, data center, or region. It collects data both from Kubernetes and from one or more Collectors running in standalone agent mode and sends it to Splunk Observability Cloud. For the default gateway config file see :new-page:`data forwarding (gateway) mode configuration in GitHub <https://github.com/signalfx/splunk-otel-collector/blob/main/cmd/otelcol/config/collector/gateway_config.yaml>`.
 
 The following image shows the architecture for the data forwarding (gateway) mode:
 
@@ -74,6 +74,8 @@ The following image shows the architecture for the data forwarding (gateway) mod
 When to use data forwarding (gateway) mode
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+While optional, the Collector in gateway mode is beneficial for large-scale Kubernetes deployments, and you might consider adding a gateway Collector in big clusters. There isn't a strict rule for defining a large-scale Kubernetes setup due to varying host specifications, host and node numbers, and telemetry volume, although 25 hosts is sometimes considered the limit for a small environment. 
+
 Use data forwarding (gateway) mode when you want to do one of the following:
 
 * Configure a larger buffer.