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https://issues.apache.org/jira/browse/HBASE-50?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12906486#comment-12906486
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Zhihong Yu edited comment on HBASE-50 at 3/29/12 7:02 PM:
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Message from: "Chongxin Li" <lichong...@zju.edu.cn>
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This is an automatically generated e-mail. To reply, visit:
http://review.cloudera.org/r/467/
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(Updated 2010-09-06 04:34:53.459404)
Review request for hbase.
Changes
-------
Add Mapreduce based export (ExportSnapshot) and import (ImportSnapshot) for
snapshot, so that snapshot of an hbase table could be exported and imported to
other data centers. Unit test (TestSnapshotExport) has passed.
Summary
-------
This patch includes the first three sub-tasks of HBASE-50:
1. Start and monitor the creation of snapshot via ZooKeeper
2. Create snapshot of an HBase table
3. Some existing functions of HBase are modified to support snapshot
Currently snapshots can be created as expected, but can not be restored or
deleted yet
This addresses bug HBASE-50.
http://issues.apache.org/jira/browse/HBASE-50
Diff: http://review.cloudera.org/r/467/diff
Testing
-------
Unit tests and integration tests with mini cluster passed.
Thanks,
Chongxin
was (Author: hbasereviewboard):
Message from: "Chongxin Li" <lichong...@zju.edu.cn>
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
http://review.cloudera.org/r/467/
-----------------------------------------------------------
(Updated 2010-09-06 04:34:53.459404)
Review request for hbase.
Changes
-------
Add Mapreduce based export (ExportSnapshot) and import (ImportSnapshot) for
snapshot, so that snapshot of an hbase table could be exported and imported to
other data centers. Unit test (TestSnapshotExport) has passed.
Summary
-------
This patch includes the first three sub-tasks of HBASE-50:
1. Start and monitor the creation of snapshot via ZooKeeper
2. Create snapshot of an HBase table
3. Some existing functions of HBase are modified to support snapshot
Currently snapshots can be created as expected, but can not be restored or
deleted yet
This addresses bug HBASE-50.
http://issues.apache.org/jira/browse/HBASE-50
Diffs (updated)
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bin/add_snapshot_family.rb PRE-CREATION
src/main/java/org/apache/hadoop/hbase/HConstants.java bfaa4a1
src/main/java/org/apache/hadoop/hbase/HRegionInfo.java ee94690
src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java 0d57270
src/main/java/org/apache/hadoop/hbase/SnapshotDescriptor.java PRE-CREATION
src/main/java/org/apache/hadoop/hbase/SnapshotExistsException.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/TablePartiallyOpenException.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java 8b01aa0
src/main/java/org/apache/hadoop/hbase/io/HalfStoreFileReader.java d35a28a
src/main/java/org/apache/hadoop/hbase/io/HbaseObjectWritable.java 20860d6
src/main/java/org/apache/hadoop/hbase/io/Reference.java 219203c
src/main/java/org/apache/hadoop/hbase/ipc/HBaseRPCProtocolVersion.java
d4bcbed
src/main/java/org/apache/hadoop/hbase/ipc/HMasterInterface.java bd48a4b
src/main/java/org/apache/hadoop/hbase/mapreduce/ExportSnapshot.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/mapreduce/ImportSnapshot.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/mapreduce/LoadIncrementalHFiles.java
1183584
src/main/java/org/apache/hadoop/hbase/master/BaseScanner.java 2deea4a
src/main/java/org/apache/hadoop/hbase/master/DeleteSnapshot.java PRE-CREATION
src/main/java/org/apache/hadoop/hbase/master/HMaster.java 4735304
src/main/java/org/apache/hadoop/hbase/master/LogsCleaner.java 9d1a8b8
src/main/java/org/apache/hadoop/hbase/master/RestoreSnapshot.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/master/SnapshotLogCleaner.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/master/SnapshotMonitor.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/master/SnapshotOperation.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/master/SnapshotSentinel.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/master/TableDelete.java 1153e62
src/main/java/org/apache/hadoop/hbase/master/TableSnapshot.java PRE-CREATION
src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java 9fdd86d
src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java 8356d64
src/main/java/org/apache/hadoop/hbase/regionserver/Snapshotter.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java
f1d52b7
src/main/java/org/apache/hadoop/hbase/regionserver/Store.java ae9e190
src/main/java/org/apache/hadoop/hbase/regionserver/StoreFile.java 107d641
src/main/java/org/apache/hadoop/hbase/regionserver/ZKSnapshotWatcher.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java 20a535c
src/main/java/org/apache/hadoop/hbase/replication/master/ReplicationLogCleaner.java
4d4b00a
src/main/java/org/apache/hadoop/hbase/util/FSUtils.java 5cf3481
src/main/java/org/apache/hadoop/hbase/zookeeper/ZooKeeperWrapper.java 3256ac9
src/main/resources/hbase-default.xml 419bc6d
src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java fadee21
src/test/java/org/apache/hadoop/hbase/client/TestAdmin.java c9b78b9
src/test/java/org/apache/hadoop/hbase/mapreduce/TestSnapshotExport.java
PRE-CREATION
src/test/java/org/apache/hadoop/hbase/master/TestLogsCleaner.java 8b7f60f
src/test/java/org/apache/hadoop/hbase/master/TestSnapshot.java PRE-CREATION
src/test/java/org/apache/hadoop/hbase/master/TestSnapshotFailure.java
PRE-CREATION
src/test/java/org/apache/hadoop/hbase/regionserver/TestCompaction.java
34b8044
src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java c425953
src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionSnapshot.java
PRE-CREATION
src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreFile.java 38ef520
src/test/java/org/apache/hadoop/hbase/regionserver/TestZKSnapshotWatcher.java
PRE-CREATION
Diff: http://review.cloudera.org/r/467/diff
Testing
-------
Unit tests and integration tests with mini cluster passed.
Thanks,
Chongxin
> Snapshot of table
> -----------------
>
> Key: HBASE-50
> URL: https://issues.apache.org/jira/browse/HBASE-50
> Project: HBase
> Issue Type: New Feature
> Affects Versions: 0.96.0
> Reporter: Billy Pearson
> Assignee: Li Chongxin
> Priority: Minor
> Labels: gsoc
> Fix For: 0.96.0
>
> Attachments: HBase Snapshot Design Report V2.pdf, HBase Snapshot
> Design Report V3.pdf, HBase Snapshot Implementation Plan.pdf, Snapshot Class
> Diagram.png
>
>
> Havening an option to take a snapshot of a table would be vary useful in
> production.
> What I would like to see this option do is do a merge of all the data into
> one or more files stored in the same folder on the dfs. This way we could
> save data in case of a software bug in hadoop or user code.
> The other advantage would be to be able to export a table to multi locations.
> Say I had a read_only table that must be online. I could take a snapshot of
> it when needed and export it to a separate data center and have it loaded
> there and then i would have it online at multi data centers for load
> balancing and failover.
> I understand that hadoop takes the need out of havening backup to protect
> from failed servers, but this does not protect use from software bugs that
> might delete or alter data in ways we did not plan. We should have a way we
> can roll back a dataset.
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