[jira] [Comment Edited] (CASSANDRA-7342) CAS writes does not have hint functionality.

["sankalp kohli (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-7342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14028420#comment-14028420 ] 

sankalp kohli edited comment on CASSANDRA-7342 at 6/11/14 9:30 PM:
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I was thinking of ways to do it. Can we use the same hints CF and add a new column called cas_commit and save commits there. This way we can distinguish while replaying the logs whether it is a commit or a normal mutation. 

CREATE TABLE hints (
    target_id uuid,
    hint_id timeuuid,
    message_version int,
    mutation blob,
    cas_commit blob,  //New Column 
    PRIMARY KEY (target_id, hint_id, message_version);


was (Author: kohlisankalp):
I was thinking of ways to do it. Can we use the same hints CF and add a new column called cas_commit and save commits there. This way we can distinguish while replaying the logs whether it is a commit or a normal mutation. 

CREATE TABLE hints (
    target_id uuid,
    hint_id timeuuid,
    message_version int,
    mutation blob,
    cas_commit blob,
    PRIMARY KEY (target_id, hint_id, message_version)
 * ) WITH COMPACT STORAGE;

> CAS writes does not have hint functionality. 
> ---------------------------------------------
>
>                 Key: CASSANDRA-7342
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7342
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: sankalp kohli
>
> When a dead node comes up, it gets the last commit but not anything which it has missed. 
> This reduces the durability of those writes compared to other writes. 



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