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https://issues.apache.org/jira/browse/HBASE-7987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13971889#comment-13971889
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Hadoop QA commented on HBASE-7987:
----------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12640517/HBASE-7987-v4.patch
against trunk revision .
ATTACHMENT ID: 12640517
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 31 new
or modified tests.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 lineLengths{color}. The patch does not introduce lines
longer than 100
{color:green}+1 site{color}. The mvn site goal succeeds with this patch.
{color:green}+1 core tests{color}. The patch passed unit tests in .
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/9305//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9305//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9305//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9305//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9305//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9305//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9305//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9305//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9305//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/9305//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/9305//console
This message is automatically generated.
> Snapshot Manifest file instead of multiple empty files
> ------------------------------------------------------
>
> Key: HBASE-7987
> URL: https://issues.apache.org/jira/browse/HBASE-7987
> Project: HBase
> Issue Type: Improvement
> Components: snapshots
> Reporter: Matteo Bertozzi
> Assignee: Matteo Bertozzi
> Fix For: 1.0.0
>
> Attachments: HBASE-7987-v0.patch, HBASE-7987-v1.patch,
> HBASE-7987-v2.patch, HBASE-7987-v2.sketch, HBASE-7987-v3.patch,
> HBASE-7987-v4.patch, HBASE-7987.sketch
>
>
> Currently taking a snapshot means creating one empty file for each file in
> the source table directory, plus copying the .regioninfo file for each
> region, the table descriptor file and a snapshotInfo file.
> during the restore or snapshot verification we traverse the filesystem
> (fs.listStatus()) to find the snapshot files, and we open the .regioninfo
> files to get the information.
> to avoid hammering the NameNode and having lots of empty files, we can use a
> manifest file that contains the list of files and information that we need.
> To keep the RS parallelism that we have, each RS can write its own manifest.
> {code}
> message SnapshotDescriptor {
> required string name;
> optional string table;
> optional int64 creationTime;
> optional Type type;
> optional int32 version;
> }
> message SnapshotRegionManifest {
> optional int32 version;
> required RegionInfo regionInfo;
> repeated FamilyFiles familyFiles;
> message StoreFile {
> required string name;
> optional Reference reference;
> }
> message FamilyFiles {
> required bytes familyName;
> repeated StoreFile storeFiles;
> }
> }
> {code}
> {code}
> /hbase/.snapshot/<snapshotName>
> /hbase/.snapshot/<snapshotName>/snapshotInfo
> /hbase/.snapshot/<snapshotName>/<tableName>
> /hbase/.snapshot/<snapshotName>/<tableName>/tableInfo
> /hbase/.snapshot/<snapshotName>/<tableName>/regionManifest(.n)
> {code}
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