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From "Ariel Weisberg (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-8429) Stress on trunk fails mixed workload on missing keys
Date Mon, 08 Dec 2014 14:24:12 GMT


Ariel Weisberg updated CASSANDRA-8429:

Looking at the problem commit it seems like LeveledCompaction might be part of the problem
so here are the stress settings I used to get leveled compaction on the test table.

> Stress on trunk fails mixed workload on missing keys
> ----------------------------------------------------
>                 Key: CASSANDRA-8429
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: Ubuntu 14.04
>            Reporter: Ariel Weisberg
>            Assignee: Ariel Weisberg
>         Attachments: cluster.conf,
> Starts as part of merge commit 25be46497a8df46f05ffa102bc645bfd684ea48a
> Stress will say that a key wasn't validated because it isn't returned even though it's
loaded. The key will eventually appear and can be queried using cqlsh.
> Reproduce with
> #!/bin/sh
> rm /tmp/fark
> ROWCOUNT=10000000
> SCHEMA='-col n=fixed(1) -schema compaction(strategy=LeveledCompactionStrategy) compression=LZ4Compressor'
> ./cassandra-stress write n=$ROWCOUNT -node xh61 -pop seq=1..$ROWCOUNT no-wrap -rate threads=25
> ./cassandra-stress mixed "ratio(read=2)" n=100000000 -node xh61 -pop "dist=extreme(1..$ROWCOUNT,0.6)"
-rate threads=25 $SCHEMA

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