elek opened a new pull request #656: HDDS-3142. Create isolated enviornment for OM to test it without SCM. URL: https://github.com/apache/hadoop-ozone/pull/656 ## What changes were proposed in this pull request? `OmKeyGenerator` class from Freon can generate keys (open key + commit key). But this test tests both OM and SCM performance. It seems to be useful to have a method to test only the OM performance with faking the response from SCM. Can be done easily with the same approach what we have in HDDS-3023: A simple utility class can be implemented and with byteman we can replace the client calls with the fake method. ## What is the link to the Apache JIRA https://issues.apache.org/jira/browse/HDDS-3142 ## How was this patch tested? 1. Download [byteman](https://byteman.jboss.org/) 2. Start a pure OM (`ozone om --init` + `ozone om`) with the following JVM parameters: (change the path) ``` -javaagent:/home/elek/prog/byteman/lib/byteman.jar=script:/home/elek/projects/ozone/dev-support/byteman/mock-scm.btm,boot:/home/elek/prog/byteman/lib/byteman.jar -Dorg.jboss.byteman.transform.all ``` 3. Start a simple freon test: `ozone freon omkg` Expected result: It should be possible to init and start OM without SCM and test it with the key generator)
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