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https://issues.apache.org/jira/browse/HBASE-4321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13103212#comment-13103212
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[email protected] commented on HBASE-4321:
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just some style nits
src/main/java/org/apache/hadoop/hbase/util/RegionSplitCalculator.java
<https://reviews.apache.org/r/1703/#comment4263>
we use commons-logging, not slfj4. Should be LogFactory.getLog(...)
also shoudl be static final
src/main/java/org/apache/hadoop/hbase/util/RegionSplitCalculator.java
<https://reviews.apache.org/r/1703/#comment4264>
should be final, and can it be private?
src/main/java/org/apache/hadoop/hbase/util/RegionSplitCalculator.java
<https://reviews.apache.org/r/1703/#comment4265>
all of these can be final, and should be moved up above the constructor at
the top of the class
src/main/java/org/apache/hadoop/hbase/util/RegionSplitCalculator.java
<https://reviews.apache.org/r/1703/#comment4266>
how about just: if end.length == 0?
- Todd
On 2011-09-11 23:54:04, jmhsieh wrote:
bq.
bq. -----------------------------------------------------------
bq. This is an automatically generated e-mail. To reply, visit:
bq. https://reviews.apache.org/r/1703/
bq. -----------------------------------------------------------
bq.
bq. (Updated 2011-09-11 23:54:04)
bq.
bq.
bq. Review request for hbase, Todd Lipcon and Michael Stack.
bq.
bq.
bq. Summary
bq. -------
bq.
bq. This is the core region split calculator. It provides a sorted set of
region split points, and a "coverage" multimap. This is enough information to
properly determine dupe start keys, all the different kinds of overlap, as well
as holes.
bq.
bq.
bq. This addresses bug hbase-4321.
bq. https://issues.apache.org/jira/browse/hbase-4321
bq.
bq.
bq. Diffs
bq. -----
bq.
bq. src/main/java/org/apache/hadoop/hbase/util/KeyRange.java PRE-CREATION
bq. src/main/java/org/apache/hadoop/hbase/util/RegionSplitCalculator.java
PRE-CREATION
bq.
src/test/java/org/apache/hadoop/hbase/util/TestRegionSplitCalculator.java
PRE-CREATION
bq.
bq. Diff: https://reviews.apache.org/r/1703/diff
bq.
bq.
bq. Testing
bq. -------
bq.
bq. Unit tests just checks algorithm, no dependencies on HBase yet.
bq.
bq.
bq. Thanks,
bq.
bq. jmhsieh
bq.
bq.
> Add more comprehensive region split calculator
> ----------------------------------------------
>
> Key: HBASE-4321
> URL: https://issues.apache.org/jira/browse/HBASE-4321
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.90.4
> Reporter: Jonathan Hsieh
> Assignee: Jonathan Hsieh
> Attachments:
> 0001-HBASE-4321-Add-more-comprehensive-region-split-calcu.patch,
> hbase-4321.diff
>
>
> Hbck currently scans through meta one entry at a time, only keeping a
> reference to the previous meta entry. This is insufficient for capturing all
> the possible problems in meta and needs something more to properly identify
> holes, overlaps, duplicate start keys, and otherwise invalid meta entries.
> Ideally, this calculator could also be used online interrogating an existing
> meta (HBASE-4058), and also used to generate a completely new meta offline
> just from regioninfo and in hdfs (HBASE-3505).
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