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How to Use Grok to Structure Unstructured Data in Logstash | by Songtham Tung | HackerNoon.com | Medium
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How to Use Grok to Structure Unstructured Data in Logstash | by Songtham Tung | HackerNoon.com | Medium
elasticsearch/libs/grok/src/main/resources/patterns/ecs-v1/grok-patterns at main · elastic/elasticsearch · GitHub
discrepency between grok pattern TIMESTAMP_ISO8601 and ISO8601 in date filter · Issue #1464 · elastic/logstash · GitHub
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