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From "Sylvain Lebresne (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-2795) Autodelete empty rows
Date Mon, 20 Jun 2011 10:26:47 GMT


Sylvain Lebresne commented on CASSANDRA-2795:

bq. I tested setting gc_grace very low (tried 0 and 1) in a single node, and the row didn't

Ok, to be precise you need to have a compaction occuring after gc_grace has passed. So you'll
need to flush after the insertion, wait for the column to expire, force a compaction, wait
for it to finish and then request.

> Autodelete empty rows
> ---------------------
>                 Key: CASSANDRA-2795
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core, Tools
>    Affects Versions: 0.8.0
>            Reporter: Pau Rodriguez
> In a system where every column expire using TTL. The rows persist, and they are empty.
> If is possible to also delete them if empty when last column had expired.
> I understand that this may be difficult to synchronize between all the cluster.
> If this behavior isn't good for all cases, maybe can be configured in a variable per
Column Family.
> Alternatively could be a tool to removed empty rows along all the cluster, the problem
to do that using the API is the time between the check is done and the remove is send.
> I think that is preferable to be done when last column has expired.
> Thanks in advance.

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