Ben Slater commented on CASSANDRA-12490:

I realised [~tjake] was saying the a validation error is the expected behaviour 
and occurs in 3.9 but not trunk. 

I just tried but can't get a validation error in 3.9 with a YAML file (as I 
said, I wasn't aware that validation functionality existed for YAML specs). Can 
you provide some more details on how to reproduce?

> Add sequence distribution type to cassandra stress
> --------------------------------------------------
>                 Key: CASSANDRA-12490
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12490
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Ben Slater
>            Assignee: Ben Slater
>            Priority: Minor
>             Fix For: 3.10
>         Attachments: 12490-trunk.patch, 12490.yaml, cqlstress-seq-example.yaml
> When using the write command, cassandra stress sequentially generates seeds. 
> This ensures generated values don't overlap (unless the sequence wraps) 
> providing more predictable number of inserted records (and generating a base 
> set of data without wasted writes).
> When using a yaml stress spec there is no sequenced distribution available. 
> It think it would be useful to have this for doing initial load of data for 
> testing 

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