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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-3162) Add TimeRange support into Increment to optimize for counters that are partitioned on time
Date Sat, 30 Oct 2010 02:40:20 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Gray updated HBASE-3162:
---------------------------------

    Attachment: HBASE-3162-v1.patch

Patch adds TimeRange to Increment.

> 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
>            Priority: Minor
>         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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