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https://issues.apache.org/jira/browse/HBASE-451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13043122#comment-13043122
]
[email protected] commented on HBASE-451:
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This looks excellent. Lets get it committed before it rots. Do we still need
.regioninfo after this goes in?
src/main/java/org/apache/hadoop/hbase/HConstants.java
<https://reviews.apache.org/r/849/#comment1541>
Copy/paste error.
src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
<https://reviews.apache.org/r/849/#comment1542>
WhooHoo... this is starting out good!
I think you should take the opportunity of changing HRI to be a
VersionedWritable.
src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
<https://reviews.apache.org/r/849/#comment1543>
Excellent! (HRI not having ref to HTD)
src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
<https://reviews.apache.org/r/849/#comment1544>
This works? Thats interesting.
src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
<https://reviews.apache.org/r/849/#comment1545>
When would this be used?
src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
<https://reviews.apache.org/r/849/#comment1546>
This should not be allowed? Are you not going to mess up stuff if table
gets changed on an HRI?
src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
<https://reviews.apache.org/r/849/#comment1547>
Should these be deprecated rather than removed? Even if we returned a null
only?
src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
<https://reviews.apache.org/r/849/#comment1548>
This is perverse, begin able to change the HTD under an HRI. Can't believe
this actually was allowed exist.
src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
<https://reviews.apache.org/r/849/#comment1549>
You could just do an equals since its boolean... Bytes.equals...
src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
<https://reviews.apache.org/r/849/#comment1550>
ditto
src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
<https://reviews.apache.org/r/849/#comment1551>
This is incorrect. Should be isMetaTable() or isRootRegion... a 'meta'
region is a .META. or -ROOT- member.
src/main/java/org/apache/hadoop/hbase/HRegionInfoForMigration.java
<https://reviews.apache.org/r/849/#comment1552>
Put this into a migration subpackage?
src/main/java/org/apache/hadoop/hbase/HRegionInfoForMigration.java
<https://reviews.apache.org/r/849/#comment1554>
Oh, so what is this? Its old-school HRI? If so, call it HRI090? Or if
you have it in a subpackage migration, it can have same name and just be fully
specified whereever it is used.. the migration subpackage will make it
explicity taht this is not same as new HRI.
src/main/java/org/apache/hadoop/hbase/HRegionInfoForMigration.java
<https://reviews.apache.org/r/849/#comment1553>
This is from elsewhere? Does it belong here?
src/main/java/org/apache/hadoop/hbase/KeyValue.java
<https://reviews.apache.org/r/849/#comment1555>
I don't think we should do this by default. What if KV has a value of MBs?
src/main/java/org/apache/hadoop/hbase/catalog/MetaEditor.java
<https://reviews.apache.org/r/849/#comment1557>
What if we crash half-way through migration? We should be able to deal w/
a .META. that is half the old style HRI and half the new style?
src/main/java/org/apache/hadoop/hbase/catalog/MetaEditor.java
<https://reviews.apache.org/r/849/#comment1556>
You want to leave these in place?
src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java
<https://reviews.apache.org/r/849/#comment1558>
What a crazy way of getting HTDs.
src/main/java/org/apache/hadoop/hbase/ipc/HMasterInterface.java
<https://reviews.apache.org/r/849/#comment1559>
Do we need these last two? Can't we use this first method to get the latter?
src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
<https://reviews.apache.org/r/849/#comment1560>
Is this going to the FS to read tables? And we're holding sync while we
are doing it? Is that necessary?
src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
<https://reviews.apache.org/r/849/#comment1561>
This method belongs in master since its going to run the migration?
src/main/java/org/apache/hadoop/hbase/master/MasterFileSystem.java
<https://reviews.apache.org/r/849/#comment1562>
Close the file?
src/main/java/org/apache/hadoop/hbase/master/MasterFileSystem.java
<https://reviews.apache.org/r/849/#comment1563>
Good. The human readable version is included.
src/main/java/org/apache/hadoop/hbase/master/MasterFileSystem.java
<https://reviews.apache.org/r/849/#comment1564>
I wonder if you have to create the file elsewhere and then do a rename to
put it in place? Else if crash, could be half-written? Do we do this w/
.regioninfo?
- Michael
On 2011-06-02 20:52:15, Michael Stack wrote:
bq.
bq. -----------------------------------------------------------
bq. This is an automatically generated e-mail. To reply, visit:
bq. https://reviews.apache.org/r/849/
bq. -----------------------------------------------------------
bq.
bq. (Updated 2011-06-02 20:52:15)
bq.
bq.
bq. Review request for hbase.
bq.
bq.
bq. Summary
bq. -------
bq.
bq. Posting for Subbu See issue for his description of change.
bq.
bq.
bq. This addresses bug HBASE-451.
bq. https://issues.apache.org/jira/browse/HBASE-451
bq.
bq.
bq. Diffs
bq. -----
bq.
bq. src/main/java/org/apache/hadoop/hbase/HConstants.java bd4c64c
bq. src/main/java/org/apache/hadoop/hbase/HRegionInfo.java 9502b1d
bq. src/main/java/org/apache/hadoop/hbase/HRegionInfoForMigration.java
PRE-CREATION
bq. src/main/java/org/apache/hadoop/hbase/KeyValue.java 7033800
bq. src/main/java/org/apache/hadoop/hbase/catalog/MetaEditor.java a25b0f0
bq. src/main/java/org/apache/hadoop/hbase/catalog/MetaReader.java eb57197
bq. src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java 7594822
bq. src/main/java/org/apache/hadoop/hbase/client/HConnection.java f722155
bq. src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java
94ee1a0
bq. src/main/java/org/apache/hadoop/hbase/client/HTable.java c82e1dd
bq. src/main/java/org/apache/hadoop/hbase/client/MetaScanner.java 2734f30
bq.
src/main/java/org/apache/hadoop/hbase/client/UnmodifyableHRegionInfo.java
23e7a6b
bq. src/main/java/org/apache/hadoop/hbase/io/HbaseObjectWritable.java
d531b8d
bq. src/main/java/org/apache/hadoop/hbase/ipc/HMasterInterface.java 4704c39
bq. src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
38914a8
bq. src/main/java/org/apache/hadoop/hbase/master/CatalogJanitor.java 5b4a4b7
bq. src/main/java/org/apache/hadoop/hbase/master/HMaster.java b8489ac
bq. src/main/java/org/apache/hadoop/hbase/master/MasterFileSystem.java
b22a3e4
bq.
src/main/java/org/apache/hadoop/hbase/master/handler/ClosedRegionHandler.java
c98ed17
bq.
src/main/java/org/apache/hadoop/hbase/master/handler/DeleteTableHandler.java
5a8bb20
bq.
src/main/java/org/apache/hadoop/hbase/master/handler/ModifyTableHandler.java
6380520
bq.
src/main/java/org/apache/hadoop/hbase/master/handler/OpenedRegionHandler.java
3d16e47
bq.
src/main/java/org/apache/hadoop/hbase/master/handler/ServerShutdownHandler.java
dace150
bq.
src/main/java/org/apache/hadoop/hbase/master/handler/TableAddFamilyHandler.java
fcea483
bq.
src/main/java/org/apache/hadoop/hbase/master/handler/TableDeleteFamilyHandler.java
a963c6c
bq.
src/main/java/org/apache/hadoop/hbase/master/handler/TableModifyFamilyHandler.java
4029893
bq. src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java e5bd154
bq. src/main/java/org/apache/hadoop/hbase/regionserver/LogRoller.java
9ccf248
bq. src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java
072fd8d
bq. src/main/java/org/apache/hadoop/hbase/regionserver/Store.java 21468ad
bq.
src/main/java/org/apache/hadoop/hbase/regionserver/handler/OpenRegionHandler.java
ba2daa9
bq. src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java 0716788
bq. src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALObserver.java
3def4b6
bq.
src/main/java/org/apache/hadoop/hbase/replication/regionserver/Replication.java
1a87947
bq. src/main/java/org/apache/hadoop/hbase/util/FSUtils.java 3409108
bq. src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java 39591a0
bq. src/main/java/org/apache/hadoop/hbase/util/HMerge.java c07f8dc
bq. src/main/java/org/apache/hadoop/hbase/util/MetaUtils.java 540d7df
bq. src/main/java/org/apache/hadoop/hbase/util/RegionSplitter.java 6d0c803
bq. src/main/java/org/apache/hadoop/hbase/util/Writables.java 3e60f97
bq. src/test/java/org/apache/hadoop/hbase/HBaseTestCase.java 4c58791
bq. src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java babd788
bq. src/test/java/org/apache/hadoop/hbase/TestCompare.java bbac815
bq. src/test/java/org/apache/hadoop/hbase/TestScanMultipleVersions.java
1f51703
bq. src/test/java/org/apache/hadoop/hbase/TestSerialization.java 05f0efc
bq. src/test/java/org/apache/hadoop/hbase/TimestampTestBase.java 1105509
bq. src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java
c3b23fe
bq. src/test/java/org/apache/hadoop/hbase/client/TestMetaMigration.java
PRE-CREATION
bq. src/test/java/org/apache/hadoop/hbase/client/TestTimestamp.java db42192
bq.
src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoprocessorInterface.java
f0418d1
bq.
src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java
46ba184
bq.
src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverStacking.java
18380c6
bq. src/test/java/org/apache/hadoop/hbase/coprocessor/TestWALObserver.java
19397fb
bq. src/test/java/org/apache/hadoop/hbase/filter/TestColumnPrefixFilter.java
e1eb02a
bq.
src/test/java/org/apache/hadoop/hbase/filter/TestDependentColumnFilter.java
04705c3
bq. src/test/java/org/apache/hadoop/hbase/filter/TestFilter.java bfa3c72
bq. src/test/java/org/apache/hadoop/hbase/master/TestCatalogJanitor.java
ada2af6
bq.
src/test/java/org/apache/hadoop/hbase/master/TestDistributedLogSplitting.java
ba87bc0
bq. src/test/java/org/apache/hadoop/hbase/master/TestLoadBalancer.java
d909997
bq. src/test/java/org/apache/hadoop/hbase/master/TestMasterFailover.java
2022767
bq.
src/test/java/org/apache/hadoop/hbase/master/TestMasterStatusServlet.java
1fef788
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/TestColumnSeeking.java
e2f4507
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactSelection.java
48fa162
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/TestGetClosestAtOrBefore.java
3b7c7e8
bq. src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
e106b45
bq. src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionInfo.java
516139b
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/TestRSStatusServlet.java
40d352e
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/TestResettingCounters.java
f092371
bq. src/test/java/org/apache/hadoop/hbase/regionserver/TestScanner.java
ef8a4b2
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/TestSplitTransaction.java
b85b912
bq. src/test/java/org/apache/hadoop/hbase/regionserver/TestStore.java
dbe5fb1
bq. src/test/java/org/apache/hadoop/hbase/regionserver/TestWideScanner.java
2cc197f
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/handler/TestOpenRegionHandler.java
bcf9024
bq. src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestHLog.java
e2c158a
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestWALObserver.java
5b95154
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestWALReplay.java
4de5b95
bq.
src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationSourceManager.java
3f9302a
bq.
src/test/java/org/apache/hadoop/hbase/rest/model/TestTableRegionModel.java
c02dfda
bq. src/test/java/org/apache/hadoop/hbase/util/TestHBaseFsck.java a6bdbe0
bq. src/test/java/org/apache/hadoop/hbase/util/TestMergeTable.java 3039df2
bq. src/test/java/org/apache/hadoop/hbase/util/TestMergeTool.java 18cd055
bq.
bq. Diff: https://reviews.apache.org/r/849/diff
bq.
bq.
bq. Testing
bq. -------
bq.
bq.
bq. Thanks,
bq.
bq. Michael
bq.
bq.
> 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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