[jira] [Updated] (CASSANDRA-8987) cassandra-stress should support a more complex client model

["Benedict (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-8987?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benedict updated CASSANDRA-8987:
--------------------------------
    Assignee:     (was: Benedict)

> cassandra-stress should support a more complex client model
> -----------------------------------------------------------
>
>                 Key: CASSANDRA-8987
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8987
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Benedict
>
> Orthogonal to CASSANDRA-8986, but still very important, is stress' simulation of clients: currently we assume a fixed number of clients performing infinite synchronous work, whereas, as I [argued|https://groups.google.com/forum/#!topic/mechanical-sympathy/icNZJejUHfE%5B101-125%5D] on the mechanical sympathy mailing list, the correct model is to have a new client arrival distribution and a distinct client model. Ideally, however, I would like to expand this to support client models that can simulate multi-table "transactions", with both synchronous and asynchronous steps. So, let's say we have three tables T1, T2, T3, we could say something like:
> A client performs:
> * a registration by insert to T1 (and/or perhaps lookup in T1), multiple inserts to T2 and T2, in parallel
> * followed by a number of queries on T3
> Probably the best way to achieve this is with a tiered "transaction" definition that can be composed, so that any single query or insert is a "transaction" that itself may be sequentially or in parallel composed with any other to compose a new macro transaction. This would then be combined with a client arrival rate distribution to produce a total cluster workload.
> At least one remaining question is if we want the operations to be data dependent, in which case this may well interact with CASSANDRA-8986, and probably requires a little thought. [~jshook] [~jeromatron] [~mstump] [~tupshin] [~jlacefie] thoughts on this?



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