Mailing-List: contact commits-help@cassandra.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@cassandra.apache.org
Date: Thu, 12 Jan 2012 20:42:42 +0000 (UTC)
From: "Jonathan Ellis (Commented) (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: 
 <1003599245.35881.1326400962465.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <245504745.27324.1326233319412.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (CASSANDRA-3722) Send Hints to Dynamic Snitch
 when Compaction or repair is going on for a node.
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/CASSANDRA-3722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13185217#comment-13185217 ] 

Jonathan Ellis commented on CASSANDRA-3722:
-------------------------------------------

bq. the problem with that is that until we send the traffic actual traffic to the suspected node we will not know it

Right, so I'm saying instead of gossiping an indirect indicator like compaction status, we could gossip read latency directly.
                
> Send Hints to Dynamic Snitch when Compaction or repair is going on for a node.
> ------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-3722
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3722
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 1.1
>            Reporter: Vijay
>            Assignee: Vijay
>            Priority: Minor
>
> Currently Dynamic snitch looks at the latency for figuring out which node will be better serving the requests, this works great but there is a part of the traffic sent to collect this data... There is also a window when Snitch doesn't know about some major event which are going to happen on the node (Node which is going to receive the data request).
> It would be great if we can send some sort hints to the Snitch so they can score based on known events causing higher latencies.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira