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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-4062) Change MutationSet.mutations to use HashSet
Date Fri, 20 Nov 2015 16:12:11 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-4062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15018211#comment-15018211
] 

Eric Newton commented on ACCUMULO-4062:
---------------------------------------

Wouldn't computing the hash be kind of expensive (in comparison to List#add)? Couldn't the
client just keep better track of the mutations they are generating?


> Change MutationSet.mutations to use HashSet
> -------------------------------------------
>
>                 Key: ACCUMULO-4062
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4062
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: client
>            Reporter: Dave Marion
>
> Change TabletServerBatchWriter.MutationSet.mutations from a
> {code}
>   HashMap<String,List<Mutation>>
> {code}
> to
> {code}
>   HashMap<String,HashSet<Mutation>>
> {code}
> so that duplicate mutations added by a client are not sent to the server.



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