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https://issues.apache.org/jira/browse/HBASE-3162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12926538#action_12926538
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HBase Review Board commented on HBASE-3162:
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Message from: "Jonathan Gray" <[email protected]>
bq. On 2010-10-29 21:19:11, Ryan Rawson wrote:
bq. > trunk/src/main/java/org/apache/hadoop/hbase/client/Increment.java, line
274
bq. > <http://review.cloudera.org/r/1132/diff/1/?file=16260#file16260line274>
bq. >
bq. > technically Increment.java has never shipped in a published version
of HBase so we wont need to bump any version numbers I think.
+1
- Jonathan
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> Add TimeRange support into Increment to optimize for counters that are
> partitioned on time
> ------------------------------------------------------------------------------------------
>
> Key: HBASE-3162
> URL: https://issues.apache.org/jira/browse/HBASE-3162
> Project: HBase
> Issue Type: Improvement
> Components: client, regionserver
> Affects Versions: 0.90.0
> Reporter: Jonathan Gray
> Assignee: Jonathan Gray
> Priority: Minor
> Fix For: 0.90.0
>
> Attachments: HBASE-3162-v1.patch
>
>
> In many use cases of increments, a given counter is only incremented during a
> specific window of time (ie. the counters are partitioned/sharded by time).
> With this kind of schema, you are constantly creating new counters. When a
> new counter is "created" (incremented the first time) you will always end up
> looking at a block from every file in the region because no previous value
> will exist. However, with the new TimeRange optimizations that skip files if
> they don't contain values of the TimeRange you're interested in, we could
> utilize that information to optimize the Get within the increment.
> This would be optional and an addition to the Increment class.
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