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Posted to commits@cassandra.apache.org by "Brandon Williams (JIRA)" <ji...@apache.org> on 2014/04/25 21:27:15 UTC
[jira] [Assigned] (CASSANDRA-7088) Zero length BigInteger
exception causing processing to freeze
[ https://issues.apache.org/jira/browse/CASSANDRA-7088?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Brandon Williams reassigned CASSANDRA-7088:
-------------------------------------------
Assignee: Sylvain Lebresne
> Zero length BigInteger exception causing processing to freeze
> --------------------------------------------------------------
>
> Key: CASSANDRA-7088
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7088
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: Linux Mint 16
> Reporter: Jacek Furmankiewicz
> Assignee: Sylvain Lebresne
> Attachments: cassandra.yaml
>
>
> We attempted to migrate our developers to Cassandra 2.0.7 from 1.2.
> Everything worked perfectly, but we have experienced a massive drop in developer velocity.
> We run integration tests with Cucumber BDD and 1000 BDDs went from 7 minutes (Cassandra 1.2) to 15 minutes (2.0.7),
> This is when we run Cassandra of the ramdisk (/dev/shm) to make it run faster on dev boxes.
> When we tried pointed to actual drives the difference was dramatic: the entire suite took over 70 minutes (!) vs 15 in Cassandra 1.2.
> After investigation, we found that most of the time is spent in the truncation logic between every scenario, where we truncate all the column families and start with a clean DB for the next test case.
> This used to be super fast in 1.2, is now very slow in 2.0.
> It may not seem important, but upgrading to 2.0 has basically cut down developer velocity by 100%, just by more than doubling the time it takes to run our BDD suite.
> We truncate the CFs using the Ruby driver:
> $cassandra.column_families.each do |column_family|
> name = column_family[0].to_s
> $cassandra.truncate! name
> end
> I am attaching our cassandra.yaml. Please note we already switched off auto_compaction before truncate, just as we did in 1.2 for dev boxes, Made no difference.
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