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From "Alex Liu (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-6091) Better Vnode support in hadoop/pig
Date Mon, 14 Oct 2013 21:15:42 GMT


Alex Liu commented on CASSANDRA-6091:

If two token ranges have the same list of endpoints, they can be merged into a sudo token
range. e.g.

   Range A [start_a, end_a)  has endpoints[node_1, node_5, node_8]
   Range B [start_b, end_c)  has endpoints[node_1, node_5, node_8]
   can be merged to 
   sudo token range Sudo_Range_A_B [[start_a, end_a), [start_b, end_b)]

We need modify CqlPagingRecordRead to support multiple token ranges split

> Better Vnode support in hadoop/pig
> ----------------------------------
>                 Key: CASSANDRA-6091
>                 URL:
>             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
> 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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