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https://issues.apache.org/jira/browse/CASSANDRA-15537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17204353#comment-17204353
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Yifan Cai commented on CASSANDRA-15537:
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Thank you [~pauloricardomg] for correlating the tickets! I should have done it
when filing. :|
> 4.0 quality testing: Local Read/Write Path: Upgrade and Diff Test
> -----------------------------------------------------------------
>
> Key: CASSANDRA-15537
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15537
> Project: Cassandra
> Issue Type: Task
> Components: Test/dtest/java, Test/dtest/python
> Reporter: Josh McKenzie
> Assignee: Yifan Cai
> Priority: Normal
> Fix For: 4.0-beta
>
>
> Reference [doc from
> NGCC|https://docs.google.com/document/d/1uhUOp7wpE9ZXNDgxoCZHejHt5SO4Qw1dArZqqsJccyQ/edit#]
> for context.
> Execution of upgrade and diff tests via cassandra-diff have proven to be one
> of the most effective approaches toward identifying issues with the local
> read/write path. These include instances of data loss, data corruption, data
> resurrection, incorrect responses to queries, incomplete responses, and
> others. Upgrade and diff tests can be executed concurrent with fault
> injection (such as host or network failure); as well as during mixed-version
> scenarios (such as upgrading half of the instances in a cluster, and running
> upgradesstables on only half of the upgraded instances).
> Upgrade and diff tests are expected to continue through the release cycle,
> and are a great way for contributors to gain confidence in the correctness of
> the database under their own workloads.
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