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https://issues.apache.org/jira/browse/CASSANDRA-561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12864049#action_12864049
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Jonathan Ellis commented on CASSANDRA-561:
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This is very different -- there's a doc .gz there with a Word explanation.
> Cassandra Simulator
> -------------------
>
> Key: CASSANDRA-561
> URL: https://issues.apache.org/jira/browse/CASSANDRA-561
> Project: Cassandra
> Issue Type: Improvement
> Components: Contrib
> Environment: RHEL 4.X, 5.X
> Reporter: Wei Li
> Attachments: simulator.zip.gz, simulatorDoc.zip.gz
>
>
> Motivations:
> =========
> Cassandra is a distributed system. This nature makes it harder for developers
> and testers to rapidly develop and test applications without proper hardware
> and network setups. It is particular hard for testing, when we want to know
> how system behaves under stressed network conditions, hardware changes and
> failures, and many other scenarios. The motivations of the building a
> Cassandra simulator is to provide a tool to simplify procedures to achieve
> above needs.
> Requirements:
> ===========
> Simulator is a separate project from Canssandra main project. It does not
> insert and/or modify any code in Cassandra main project, rather it operates
> as an additional service in Cassandra node(See enclosed doc for details).
> Simulator can be started in two modes: Simulated mode and "pure" Cassandra
> mode. The design Requirements of the simulator are:
> * To simulate multiple node operations within single linux box
> * To simulate Hardware conditions, such as adding new nodes, node out of
> service, etc.
> * To simulate network conditions, message delays, drops, etc.
> * To carry out read/write operations at the simulated environment
> * To provide APIs to access logging information
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