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Posted to commits@cassandra.apache.org by "Yang Yang (JIRA)" <ji...@apache.org> on 2011/06/17 23:23:49 UTC

[jira] [Issue Comment Edited] (CASSANDRA-2103) expiring counter columns

    [ https://issues.apache.org/jira/browse/CASSANDRA-2103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13051329#comment-13051329 ] 

Yang Yang edited comment on CASSANDRA-2103 at 6/17/11 9:22 PM:
---------------------------------------------------------------

there could be a problem with trying to rely on forcing compaction order:

if you base the intended order on max timestamp of each sstable, the timestamp is not trustworthy, because a single malicious client request can bump up its timestamp to the future, and arbitrarily change the order of compaction, thus rendering the approach in 2735 useless.

      was (Author: yangyangyyy):
    there could be a problem with trying to relying on forcing compaction order:

if you base the intended order on max timestamp of each sstable, the timestamp is not trustworthy, because a single malicious client request can bump up its timestamp to the future, and arbitrarily change the order of compaction, thus rendering the approach in 2735 useless.
  
> expiring counter columns
> ------------------------
>
>                 Key: CASSANDRA-2103
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2103
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>    Affects Versions: 0.8 beta 1
>            Reporter: Kelvin Kakugawa
>         Attachments: 0001-CASSANDRA-2103-expiring-counters-logic-tests.patch
>
>
> add ttl functionality to counter columns.

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