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ASF GitHub Bot commented on METRON-1657: ---------------------------------------- Github user ottobackwards commented on a diff in the pull request: https://github.com/apache/metron/pull/1099#discussion_r203064655 --- Diff: use-cases/parser_chaining/README.md --- @@ -233,3 +233,10 @@ cat ~/data.log | /usr/hdp/current/kafka-broker/bin/kafka-console-producer.sh --b ``` You should see indices created for the `cisco-5-304` and `cisco-6-302` data with appropriate fields created for each type. + +# Aggregated Parsers with Parser Chaining +Chained parsers can be run as aggregated parsers. These parsers continue to use the sensor specific Kafka topics, and do not do internal routing to the appropriate sensor. + --- End diff -- Should we explicitly say that when you use this type of topology so do NOT create a sensor topology for any sensor included in the aggregate? > Parser aggregation in storm > --------------------------- > > Key: METRON-1657 > URL: https://issues.apache.org/jira/browse/METRON-1657 > Project: Metron > Issue Type: Bug > Reporter: Justin Leet > Assignee: Justin Leet > Priority: Major > > Currently our parsing solution requires one storm topology per sensor. It has > been complained that this may be wasteful of resources and that, rather than > one storm topology per sensor, it would be advantageous to have multiple > sensors in the same topology. The benefit to this is that it would require > fewer storm slots. > The issue with this is that whenever we've aggregated functionality like this > before, we've run into issues appropriately being able to scale storm (e.g. > batch vs random access indexing in the same topology). The main point in > addressing this is to recommend that parsers with similar velocities and > complexity are grouped together. > Particularly for a first cut, leave the configuration mostly as-is, while > allowing for comma separated lists of sensors in start_parser_topology.sh > (e.g. bro,yaf creates a aggregated parser consisting of those two). -- This message was sent by Atlassian JIRA (v7.6.3#76005)