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From "rene kochen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-2786) After a minor compaction, deleted key-slices are visible again
Date Fri, 17 Jun 2011 12:44:47 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-2786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

rene kochen updated CASSANDRA-2786:
-----------------------------------

    Attachment: CassandraIssue.zip

> After a minor compaction, deleted key-slices are visible again
> --------------------------------------------------------------
>
>                 Key: CASSANDRA-2786
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2786
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.8.0
>         Environment: Single node with empty database
>            Reporter: rene kochen
>         Attachments: CassandraIssue.zip
>
>
> After a minor compaction, deleted key-slices are visible again.
> Steps to reproduce:
> 1) Insert a row named "test".
> 2) Insert 500000 rows. During this step, "test" is included in a major compaction.
> 3) Delete row named "test".
> 4) Insert 500000 rows. During this step, "test" is included in a minor compaction.
> After step 4, row "test" is live again.
> Test environment:
> Single node with empty database.
> Standard configured super-column-family (I see this behavior with several gc_grace settings
(big and small values):
> create column family Customers with column_type = 'Super' and comparator = 'BytesType;
> In Cassandra 0.7.6 I observe the expected behavior, i.e. after step 4, the row is still
deleted.
> I've included a .NET program to reproduce the problem. I will add a Java version later
on.

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