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From "T Jake Luciani (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-6146) CQL-native stress
Date Thu, 03 Jul 2014 20:12:36 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14051865#comment-14051865
] 

T Jake Luciani edited comment on CASSANDRA-6146 at 7/3/14 8:11 PM:
-------------------------------------------------------------------

Some things I've discovered while reviewing:

 - no_warmup option doesn't work
 - The value component generator uses the seed of the last clustering component so it always
gets the same value for all rows in a partition, since the seeds are cached.
 - If the clustering distribution is too large you end up with no rows being written. (You
can reproduce by changing the default clustering distribution to uniform(1..1024) and running
cqlstress-example.yaml)  

I'm concerned we won't be able to explain how to use this to joe user but perhaps if we come
up with better terminology it and some visual examples it will make more sense. For example
the clustering distribution is used to define the possible values in a single partition? 
 if you have a population of uniform(1..1000) and clustering of fixed(1) you only see one
value per partition


was (Author: tjake):
Some things I've discovered while reviewing:

 - no_warmup option doesn't work
 - The value component generator uses the seed of the last clustering component it always
gets the same value for all rows in a partition, since the seeds are cached.
 - If the clustering distribution is too large you end up with no rows being written. (You
can reproduce by changing the default clustering distribution to uniform(1..1024) and running
cqlstress-example.yaml)  

I'm concerned we won't be able to explain how to use this to joe user but perhaps if we come
up with better terminology it and some visual examples it will make more sense. For example
the clustering distribution is used to define the possible values in a single partition? 
 if you have a population of uniform(1..1000) and clustering of fixed(1) you only see one
value per partition

> CQL-native stress
> -----------------
>
>                 Key: CASSANDRA-6146
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6146
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Tools
>            Reporter: Jonathan Ellis
>            Assignee: T Jake Luciani
>             Fix For: 2.1.1
>
>         Attachments: 6146-v2.txt, 6146.txt, 6164-v3.txt
>
>
> The existing CQL "support" in stress is not worth discussing.  We need to start over,
and we might as well kill two birds with one stone and move to the native protocol while we're
at it.



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