Comparisons that start from Fluentd, the CNCF graduated log collector and aggregator with a large Ruby plugin ecosystem, against lighter open-source telemetry agents.
Two Apache-2.0 log collectors from the same CNCF project: Fluentd's Ruby plugin ecosystem and aggregation role against Fluent Bit's small C agent with native OpenTelemetry and metrics and traces support. Covers memory footprint, plugin coverage, forwarder and aggregator layouts, td-agent and fluent-package end-of-life dates, and when to run both.
Two lightweight log and metrics agents compared: CNCF Fluent Bit in C under Apache-2.0 against Datadog-maintained Vector in Rust under MPL-2.0, on agent and aggregator roles, transforms, OpenTelemetry support, governance and footprint.
Ruby-based Fluentd under the CNCF against Elastic's JVM-based Logstash with over 200 plugins: licensing of default versus -oss builds, memory footprint, destinations beyond Elasticsearch, Kubernetes fit and the cost of moving pipelines.
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