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From "Ben Slater (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-12490) Add sequence distribution type to cassandra stress
Date Fri, 14 Oct 2016 02:56:21 GMT


Ben Slater commented on CASSANDRA-12490:

Moving back from dev list where I think the discussion ended up by accident. 

Jake said:
No I'm not using a seq anywhere else then the command line

I said:
OK, I think it’s pretty unlikely to be this change as I didn’t change the existing code
(certainly nothing near what is used by -pop) and also I just noticed you said you had the
issue in 3.9 and CASS-12490 is destined for 3.10. 

Also, last time I looked, I thought stress didn’t validate returned results for YAML specs.
Did I miss something or did that get added recently? Can you add your actual command, etc
to the ticket?

Anyway, I will try to do some more digging over the weekend as I still suspect there is something
wrong (or at least unexpected) going on aside from this change.

> Add sequence distribution type to cassandra stress
> --------------------------------------------------
>                 Key: CASSANDRA-12490
>                 URL:
>             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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