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From "david vanderfeesten (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3229) Remove ability to disable dynamic snitch entirely
Date Thu, 15 Mar 2012 19:38:37 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13230459#comment-13230459
] 

david vanderfeesten commented on CASSANDRA-3229:
------------------------------------------------

we are experimenting with workload split between OLTP and OLAP workload using network topology
strategy. The OLTP keyspace has replicas in both (virtual)DCs. OLTP would only be written
to nodes in DC1 and only being read as OLAP input in DC2. While we don't know yet if this
is the right approach, with dynamic snitch off (and read repair chance:0) in case no nodes
are down we hope to avoid OLAP reads to show up in DC1. Without being able to switch off dynamic
snitch - I am not sure how we are able to achieve workload split (to be proven if that gives
a performance benefit).
                
> Remove ability to disable dynamic snitch entirely
> -------------------------------------------------
>
>                 Key: CASSANDRA-3229
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3229
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>            Priority: Minor
>             Fix For: 1.0.0
>
>         Attachments: 3229.txt
>
>
> We've moved dynamic snitch from "new, default to off" to "well tested, default to true,"
and it's time now to take the next step to "there is no reason to disable it, and keeping
the option around just lets people shoot their foot off."

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