HBASE-22625 documet use scan snapshot feature #496

mymeiyi · 2019-08-15T03:25:40Z

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Apache-HBase · 2019-08-15T04:23:43Z

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Apache-HBase · 2019-08-15T21:32:03Z

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Apache-HBase · 2019-08-16T02:11:46Z

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Apache-HBase · 2019-08-16T02:29:14Z

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Apache-HBase · 2019-08-16T07:14:27Z

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Apache-HBase · 2019-08-16T10:24:11Z

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Apache-HBase · 2019-08-17T02:20:36Z

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Apache-HBase · 2019-08-17T11:37:50Z

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Apache-HBase · 2019-08-17T16:08:04Z

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Apache-HBase · 2019-08-17T18:57:45Z

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openinx · 2019-08-18T01:44:11Z

src/main/asciidoc/_chapters/snapshot_scanner.adoc

+=== TableSnapshotScanner
+
+TableSnapshotScanner provide a way to do single client side scan over snapshot files.
+When use TableSnapshotScanner, we must specify a temporary directory to copy the snapshot files into. Current user should have write permissions to this directory, and this should not be a subdirectory of rootdir. The scanner deletes the contents of the directory once the scanner is closed.


copy the snapshot files into. -> restore the snapshot

rootdir -> hbase.rootdir

openinx · 2019-08-18T01:47:22Z

src/main/asciidoc/_chapters/snapshot_scanner.adoc

+:source-language: java
+
+In HBase, scan a table costs many CPU, memory... resources. Luckily, HBase provides a TableSnapshotScanner and TableSnapshotInputFormat (introduced by link:https://issues.apache.org/jira/browse/HBASE-8369[HBASE-8369]), which performs a scan over snapshot files.
+By this way, we can bypasse HBase servers, and access the underlying files directly to provide maximum performance. And can also be used with offline HBase with in-place or exported snapshot files.


bypasse -> bypass

files -> HFiles

openinx · 2019-08-18T01:51:48Z

src/main/asciidoc/_chapters/snapshot_scanner.adoc

+:toc: left
+:source-language: java
+
+In HBase, scan a table costs many CPU, memory... resources. Luckily, HBase provides a TableSnapshotScanner and TableSnapshotInputFormat (introduced by link:https://issues.apache.org/jira/browse/HBASE-8369[HBASE-8369]), which performs a scan over snapshot files.


scan a table costs many CPU, memory... resources -> scanning a big table will put tremendous pressure on the cluster.

openinx · 2019-08-18T01:53:30Z

src/main/asciidoc/_chapters/snapshot_scanner.adoc

+[source,java]
+----
+Job job = new Job(conf);
+Path restoreDir = new Path("XX"); // restore dir should not be a subdirectory HBase rootdir


a subdirectory of hbase.rootdir

openinx · 2019-08-18T01:58:58Z

src/main/asciidoc/_chapters/snapshot_scanner.adoc

+
+==== HDFS ACLs
+
+HDFS ACLs supports an "access ACL", which defines the rules to enforce during permission checks, and a "default ACL", which defines the ACL entries that new child files or sub-directories receive automatically during creation.


Provide a link referring to the document of HDFS ACL ?

openinx · 2019-08-18T02:01:17Z

src/main/asciidoc/_chapters/snapshot_scanner.adoc

+hbase.acl.sync.to.hdfs.enable=true
+----
+
+ * Modify table scheme to enable this feature for a specified table, this config is false by default for every table, this means the HBase granted acls will not synced to HDFS


will not synced -> will not be synced

Apache-HBase · 2019-08-18T02:18:11Z

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		_ master Compile Tests _
+1	mvninstall	331	master passed
0	refguide	319	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
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0	refguide	315	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1	asflicense	17	The patch does not generate ASF License warnings.
		1389

Subsystem	Report/Notes
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Apache-HBase · 2019-08-19T16:53:22Z

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
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		_ Prechecks _
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		_ master Compile Tests _
+1	mvninstall	325	master passed
0	refguide	314	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1	mvninstall	314	the patch passed
+1	shellcheck	0	There were no new shellcheck issues.
+1	whitespace	0	The patch has no whitespace issues.
0	refguide	317	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1	asflicense	17	The patch does not generate ASF License warnings.
		1385

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GITHUB PR	#496
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Apache-HBase · 2019-08-19T20:22:39Z

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
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		_ Prechecks _
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0	shelldocs	0	Shelldocs was not available.
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		_ master Compile Tests _
+1	mvninstall	317	master passed
0	refguide	316	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1	mvninstall	282	the patch passed
+1	shellcheck	0	There were no new shellcheck issues.
+1	whitespace	0	The patch has no whitespace issues.
0	refguide	309	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1	asflicense	17	The patch does not generate ASF License warnings.
		1335

Subsystem	Report/Notes
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GITHUB PR	#496
Optional Tests	dupname asflicense shellcheck shelldocs refguide
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Apache-HBase · 2019-08-19T22:46:17Z

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
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		_ Prechecks _
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0	shelldocs	1	Shelldocs was not available.
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		_ master Compile Tests _
+1	mvninstall	354	master passed
0	refguide	328	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1	mvninstall	327	the patch passed
+1	shellcheck	0	There were no new shellcheck issues.
+1	whitespace	0	The patch has no whitespace issues.
0	refguide	328	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1	asflicense	17	The patch does not generate ASF License warnings.
		1913

Subsystem	Report/Notes
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GITHUB PR	#496
Optional Tests	dupname asflicense shellcheck shelldocs refguide
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Apache-HBase · 2019-08-20T05:22:48Z

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
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		_ Prechecks _
+1	dupname	0	No case conflicting files found.
0	shelldocs	0	Shelldocs was not available.
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		_ master Compile Tests _
+1	mvninstall	332	master passed
0	refguide	333	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1	mvninstall	297	the patch passed
+1	shellcheck	0	There were no new shellcheck issues.
+1	whitespace	0	The patch has no whitespace issues.
0	refguide	333	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1	asflicense	62	The patch does not generate ASF License warnings.
		1488

Subsystem	Report/Notes
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GITHUB PR	#496
Optional Tests	dupname asflicense shellcheck shelldocs refguide
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Apache-HBase · 2019-08-20T17:39:11Z

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	63	Docker mode activated.
		_ Prechecks _
+1	dupname	0	No case conflicting files found.
0	shelldocs	0	Shelldocs was not available.
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		_ master Compile Tests _
+1	mvninstall	419	master passed
0	refguide	380	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1	mvninstall	389	the patch passed
+1	shellcheck	0	There were no new shellcheck issues.
+1	whitespace	0	The patch has no whitespace issues.
0	refguide	391	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1	asflicense	23	The patch does not generate ASF License warnings.
		1729

Subsystem	Report/Notes
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GITHUB PR	#496
Optional Tests	dupname asflicense shellcheck shelldocs refguide
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versions	git=2.11.0 maven=2018-06-17T18:33:14Z) shellcheck=0.4.4
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Apache-HBase · 2019-08-21T01:52:36Z

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	41	Docker mode activated.
		_ Prechecks _
+1	dupname	0	No case conflicting files found.
0	shelldocs	1	Shelldocs was not available.
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		_ master Compile Tests _
+1	mvninstall	330	master passed
0	refguide	304	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1	mvninstall	284	the patch passed
+1	shellcheck	1	There were no new shellcheck issues.
+1	whitespace	0	The patch has no whitespace issues.
0	refguide	313	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1	asflicense	16	The patch does not generate ASF License warnings.
		1341

Subsystem	Report/Notes
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GITHUB PR	#496
Optional Tests	dupname asflicense shellcheck shelldocs refguide
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versions	git=2.11.0 maven=2018-06-17T18:33:14Z) shellcheck=0.4.4
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Apache-HBase · 2019-08-21T08:42:53Z

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	62	Docker mode activated.
		_ Prechecks _
+1	dupname	0	No case conflicting files found.
0	shelldocs	0	Shelldocs was not available.
+1	@author	0	The patch does not contain any @author tags.
		_ master Compile Tests _
+1	mvninstall	321	master passed
0	refguide	312	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1	mvninstall	292	the patch passed
+1	shellcheck	0	There were no new shellcheck issues.
+1	whitespace	0	The patch has no whitespace issues.
0	refguide	310	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1	asflicense	16	The patch does not generate ASF License warnings.
		1369

Subsystem	Report/Notes
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GITHUB PR	#496
Optional Tests	dupname asflicense shellcheck shelldocs refguide
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versions	git=2.11.0 maven=2018-06-17T18:33:14Z) shellcheck=0.4.4
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Apache-HBase · 2019-08-21T10:28:05Z

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	75	Docker mode activated.
		_ Prechecks _
+1	dupname	0	No case conflicting files found.
0	shelldocs	1	Shelldocs was not available.
+1	@author	0	The patch does not contain any @author tags.
		_ master Compile Tests _
+1	mvninstall	355	master passed
0	refguide	358	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1	mvninstall	384	the patch passed
+1	shellcheck	0	There were no new shellcheck issues.
+1	whitespace	0	The patch has no whitespace issues.
0	refguide	383	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1	asflicense	19	The patch does not generate ASF License warnings.
		1637

Subsystem	Report/Notes
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GITHUB PR	#496
Optional Tests	dupname asflicense shellcheck shelldocs refguide
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versions	git=2.11.0 maven=2018-06-17T18:33:14Z) shellcheck=0.4.4
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Apache-HBase · 2019-08-21T15:09:16Z

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	93	Docker mode activated.
		_ Prechecks _
+1	dupname	0	No case conflicting files found.
0	shelldocs	0	Shelldocs was not available.
+1	@author	0	The patch does not contain any @author tags.
		_ master Compile Tests _
+1	mvninstall	360	master passed
0	refguide	377	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1	mvninstall	322	the patch passed
+1	shellcheck	0	There were no new shellcheck issues.
+1	whitespace	1	The patch has no whitespace issues.
0	refguide	359	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1	asflicense	17	The patch does not generate ASF License warnings.
		1593

Subsystem	Report/Notes
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GITHUB PR	#496
Optional Tests	dupname asflicense shellcheck shelldocs refguide
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versions	git=2.11.0 maven=2018-06-17T18:33:14Z) shellcheck=0.4.4
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Apache-HBase · 2019-08-21T16:21:46Z

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	110	Docker mode activated.
		_ Prechecks _
+1	dupname	1	No case conflicting files found.
0	shelldocs	2	Shelldocs was not available.
+1	@author	0	The patch does not contain any @author tags.
		_ master Compile Tests _
+1	mvninstall	427	master passed
0	refguide	352	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1	mvninstall	378	the patch passed
+1	shellcheck	0	There were no new shellcheck issues.
+1	whitespace	0	The patch has no whitespace issues.
0	refguide	347	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1	asflicense	20	The patch does not generate ASF License warnings.
		1702

Subsystem	Report/Notes
Docker	Client=19.03.1 Server=19.03.1 base: https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-496/21/artifact/out/Dockerfile
GITHUB PR	#496
Optional Tests	dupname asflicense shellcheck shelldocs refguide
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versions	git=2.11.0 maven=2018-06-17T18:33:14Z) shellcheck=0.4.4
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Apache-HBase · 2019-08-22T04:03:44Z

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	39	Docker mode activated.
		_ Prechecks _
+1	dupname	0	No case conflicting files found.
0	shelldocs	1	Shelldocs was not available.
+1	@author	0	The patch does not contain any @author tags.
		_ master Compile Tests _
+1	mvninstall	388	master passed
0	refguide	308	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1	mvninstall	293	the patch passed
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Apache-HBase · 2019-08-22T08:58:34Z

🎊 +1 overall

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Apache-HBase · 2019-08-22T13:08:45Z

🎊 +1 overall

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		2067

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Apache-HBase · 2019-08-22T17:27:56Z

🎊 +1 overall

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		2058

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Apache-HBase · 2019-08-22T20:56:59Z

🎊 +1 overall

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		1461

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Apache-HBase · 2019-08-23T18:17:55Z

🎊 +1 overall

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		1638

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Apache-HBase · 2019-08-23T20:09:23Z

🎊 +1 overall

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		1638

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Apache-HBase · 2019-08-23T21:37:31Z

🎊 +1 overall

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		1687

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Addendum adding Zheng Hu feedback.

saintstack · 2019-08-23T22:25:07Z

I pushed @openinx review edits as an addendum.

cbaenziger

D'oh always late to seeing things. It seems there may be one or two misspellings?

cbaenziger · 2019-08-23T22:36:31Z

src/main/asciidoc/_chapters/snapshot_scanner.adoc

+
+==== Basic idea
+
+The HBase files are orginazed as the following ways:


orginazed->organized

cbaenziger · 2019-08-23T22:37:34Z

src/main/asciidoc/_chapters/snapshot_scanner.adoc

+hbase.acl.sync.to.hdfs.enable=true
+----
+
+ * Modify table scheme to enable this feature for a specified table, this config is false by default for every table, this means the HBase granted acls will not synced to HDFS


scheme->schema (or CONFIGURATION)?

Fix feedback from Clay Baenziger. Signed-off-by: Clay Baenziger <[email protected]>

HBASE-22625 documet use scan snapshot feature

56d781a

openinx self-requested a review August 15, 2019 03:59

openinx reviewed Aug 18, 2019

View reviewed changes

saintstack merged commit 3b16ae2 into apache:master Aug 23, 2019

asfgit pushed a commit that referenced this pull request Aug 23, 2019

HBASE-22625 documet use scan snapshot feature (#496)

04feab9

Addendum adding Zheng Hu feedback.

cbaenziger reviewed Aug 23, 2019

View reviewed changes

asfgit pushed a commit that referenced this pull request Aug 23, 2019

HBASE-22625 documet use scan snapshot feature (#496)

504fc52

Fix feedback from Clay Baenziger. Signed-off-by: Clay Baenziger <[email protected]>

mymeiyi deleted the hdfs-acl-doc branch September 4, 2019 06:48


		==== HDFS ACLs

		HDFS ACLs supports an "access ACL", which defines the rules to enforce during permission checks, and a "default ACL", which defines the ACL entries that new child files or sub-directories receive automatically during creation.


		==== Basic idea

		The HBase files are orginazed as the following ways:

HBASE-22625 documet use scan snapshot feature #496

HBASE-22625 documet use scan snapshot feature #496

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