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Posted to issues@ozone.apache.org by GitBox <gi...@apache.org> on 2020/02/17 17:22:45 UTC
[GitHub] [hadoop-ozone] github-actions[bot] removed a comment on issue #555:
HDDS-3023. Create Freon test to test isolated Ratis LEADER
github-actions[bot] removed a comment on issue #555: HDDS-3023. Create Freon test to test isolated Ratis LEADER
URL: https://github.com/apache/hadoop-ozone/pull/555#issuecomment-587092498
```
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"body": "## What changes were proposed in this pull request?\r\n\r\nSimilart to #542 it provides a Freon (load-) test to test an isolated datanode with using full Ratis/ContainerStateMachine code path. The Freon test configures the Raft group and sends chunk write requests.\r\n\r\nA byteman script is provided to fake/mock the leader components. \r\n\r\n## What is the link to the Apache JIRA\r\n\r\nhttps://issues.apache.org/jira/browse/HDDS-3023\r\n\r\n## How was this patch tested?\r\n\r\n1. To test the patch you need RATIS-816 (create new build and change the Ratis version to a snapshot)\r\n\r\n2. Datanode should be started in standalone mode and the Ratis Grpc server protocol should be mocked.\r\n\r\nThe first can be achieved by setting the following environment variable:\r\n\r\n```\r\nOZONE_DATANODE_STANDALONE_TEST=follower\r\n```\r\n\r\nThe second one requires a [byteman](https://byteman.jboss.org/) install\r\n\r\n```\r\n-javaagent:/home/elek/prog/byteman/lib/byteman.jar=script:/home/elek/projects/ozone/dev-support/byteman/ratis-mock-followers.btm,boot:/home/elek/prog/byteman/lib/byteman.jar -Dorg.jboss.byteman.transform.all\r\n```\r\n\r\n\r\n3. And start the Datanode (you can start it from IDE as it doesn't require any other components like OM or SCM)\r\n\r\n4. Finally freon can be started:\r\n\r\n```\r\nozone freon --verbose lalg -t1 -n100000 -s 1024\r\n```",
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