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https://issues.apache.org/jira/browse/HBASE-451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13043217#comment-13043217
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Ted Yu commented on HBASE-451:
------------------------------
I ran test suite for the patch.
There were a lot of failures.
Here is one sample:
{code}
rg.apache.hadoop.hbase.master.TestZKBasedOpenCloseRegion Time elapsed: 0 sec
<<< ERROR!
org.apache.hadoop.hbase.TableNotFoundException: TestZKBasedOpenCloseRegion
at
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHTableDescriptor(HConnectionManager.java:1752)
at
org.apache.hadoop.hbase.client.HTable.getTableDescriptor(HTable.java:348)
at
org.apache.hadoop.hbase.HBaseTestingUtility.createMultiRegions(HBaseTestingUtility.java:818)
at
org.apache.hadoop.hbase.HBaseTestingUtility.createMultiRegions(HBaseTestingUtility.java:786)
at
org.apache.hadoop.hbase.HBaseTestingUtility.createMultiRegions(HBaseTestingUtility.java:760)
at
org.apache.hadoop.hbase.master.TestZKBasedOpenCloseRegion.beforeAllTests(TestZKBasedOpenCloseRegion.java:72)
{code}
> Remove HTableDescriptor from HRegionInfo
> ----------------------------------------
>
> Key: HBASE-451
> URL: https://issues.apache.org/jira/browse/HBASE-451
> Project: HBase
> Issue Type: Improvement
> Components: master, regionserver
> Affects Versions: 0.2.0
> Reporter: Jim Kellerman
> Assignee: Subbu M Iyer
> Priority: Critical
> Fix For: 0.92.0
>
> Attachments: 451_support_for_removing_HTD_from_HRI_trunk.txt,
> HBASE-451_-_First_draft_support_for_removing_HTD_from_HRI1.patch
>
>
> There is an HRegionInfo for every region in HBase. Currently HRegionInfo also
> contains the HTableDescriptor (the schema). That means we store the schema n
> times where n is the number of regions in the table.
> Additionally, for every region of the same table that the region server has
> open, there is a copy of the schema. Thus it is stored in memory once for
> each open region.
> If HRegionInfo merely contained the table name the HTableDescriptor could be
> stored in a separate file and easily found.
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