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From "Matt Corgan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9091) Update ByteRange to maintain consumer's position
Date Thu, 01 Aug 2013 01:41:48 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13725948#comment-13725948
] 

Matt Corgan commented on HBASE-9091:
------------------------------------

Yeah, it's a tough trade-off with the additional O(n).  Overall, I'm not saying you shouldn't
use a positioned data structure for this use case, just that there's also merit to having
a data structure that doesn't track position (and doesn't do bounds checking), which is what
the ByteRange is.  I was thinking we could have separate classes.  It's not a big deal though
- it won't break anything, and if the bounds checking hurts performance I can repair it easily.
                
> Update ByteRange to maintain consumer's position
> ------------------------------------------------
>
>                 Key: HBASE-9091
>                 URL: https://issues.apache.org/jira/browse/HBASE-9091
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client
>            Reporter: Nick Dimiduk
>            Assignee: Nick Dimiduk
>             Fix For: 0.95.2
>
>         Attachments: 0001-HBASE-9091-Extend-ByteRange.patch, 0001-HBASE-9091-Extend-ByteRange.patch
>
>
> ByteRange is a useful alternative to Java's ByteBuffer. Notably, it is mutable and an
instance can be assigned over a byte[] after instantiation. This is valuable as a performance
consideration when working with byte[] slices in a tight loop. Its current design is such
that it is not possible to consume a portion of the range while performing activities like
decoding an object without altering the definition of the range. It should provide a position
that is independent from the range's offset and length to make partial reads easier.

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