[jira] [Created] (CASSANDRA-16575) "compression" configuration in unit tests is incorrect and actually redundant

["Jacek Lewandowski (Jira)" <ji...@apache.org>]

Jacek Lewandowski created CASSANDRA-16575:
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             Summary: "compression" configuration in unit tests is incorrect and actually redundant
                 Key: CASSANDRA-16575
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16575
             Project: Cassandra
          Issue Type: Bug
          Components: Test/unit
            Reporter: Jacek Lewandowski


When running unit tests with "compression" configuration, we actually not use compression at all we run just unit tests without compression (which is redundant when running on CI).

The reason is that for the compression configuration we (try to) do the following:
{code:xml}
      <property name="compressed_yaml" value="${build.test.dir}/cassandra.compressed.yaml"/>
      <concat destfile="${compressed_yaml}">
          <fileset file="${test.conf}/cassandra.yaml"/>
          <fileset file="${test.conf}/commitlog_compression.yaml"/>
      </concat>
{code:xml}

however, {{cassandra.compressed.yaml}} has been replaced in CASSANDRA-14482 by two files {{commitlog_compression_LZ4.yaml}} and {{commitlog_compression_Zstd.yaml}} without changing build configuration.

All in all we could fix that but I doubt it makes any sense since {{cdc}} configuration already uses compressed commit log anyway so it feels redundant to test compression alone for each CI run. 

I vote for removing compression configuration and actually allow to manually specify yaml file to be used for testing as a test property, as well as allow to manually specify extra system properties to be passed to the test. That would make the build more flexible and remove a bit of redundant code.





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