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https://issues.apache.org/jira/browse/CASSANDRA-6146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14051865#comment-14051865
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T Jake Luciani edited comment on CASSANDRA-6146 at 7/3/14 8:11 PM:
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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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