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From "mck (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-6091) Better Vnode support in hadoop/pig
Date Sun, 12 Oct 2014 21:48:34 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14168561#comment-14168561
] 

mck edited comment on CASSANDRA-6091 at 10/12/14 9:48 PM:
----------------------------------------------------------

I guess this^ approach falls apart once with increasing number of nodes in a cluster (the
chances of adjacent splits with same dataNodes drops quickly), and it comes back to needing
splits with multiple token ranges and CRR supporting that. 
But i still don't get why you *need* to have any thrift/CQL server-side change (at least to
begin with)? 

For example this [patch|https://github.com/michaelsembwever/cassandra/pull/2/files] 
    (note i'm intentionally waiting on feedback before tackling CFIF+CFRR).


was (Author: michaelsembwever):
I guess this^ approach falls apart once with increasing number of nodes in a cluster (the
chances of adjacent splits with same dataNodes drops quickly), and it comes back to splits
with multiple token ranges and CRR supporting that. 
But i still don't get why you *need* to have any thrift/CQL server-side change (at least to
begin with)? 

> Better Vnode support in hadoop/pig
> ----------------------------------
>
>                 Key: CASSANDRA-6091
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6091
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Hadoop
>            Reporter: Alex Liu
>            Assignee: Alex Liu
>
> CASSANDRA-6084 shows there are some issues during running hadoop/pig job if vnodes are
enable. Also the hadoop performance of vnode enabled nodes  are bad for there are so many
splits.
> The idea is to combine vnode splits into a big sudo splits so it work like vnode is disable
for hadoop/pig job



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