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From "Benedict (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7550) Reduce tombstones
Date Wed, 16 Jul 2014 11:39:06 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14063400#comment-14063400
] 

Benedict commented on CASSANDRA-7550:
-------------------------------------

This doesn't address the issue Aleksey raises: this flag needs to know if the record exists
on disk already (requiring a read-before-write), or if it exists _on another node in the cluster_,
which is a very hard problem

> Reduce tombstones
> -----------------
>
>                 Key: CASSANDRA-7550
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7550
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Hanson
>
> If a record is still in Memtable, the Delete to that record shall be done in memory (Make
Compaction in memory), instead of placing a tombstone. This way it can save disk I/O and space
a lot for records with short lifecycle.



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