HDFS-15025. Applying NVDIMM storage media to HDFS

[huangtianhua]

The non-volatile memory NVDIMM is faster than SSD,
it can be used simultaneously with RAM, DISK and SSD.
Storing the data of HDFS on NVDIMM directly will get
better response rate and reliability.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	2m 14s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+0 🆗	prototool	0m 0s	prototool was not available.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s	The patch appears to include 3 new or modified test files.
		_ trunk Compile Tests _
+0 🆗	mvndep	0m 27s	Maven dependency ordering for branch
+1 💚	mvninstall	26m 30s	trunk passed
+1 💚	compile	31m 4s	trunk passed with JDK Ubuntu-11.0.7+10-post-Ubuntu-2ubuntu218.04
+1 💚	compile	19m 26s	trunk passed with JDK Private Build-1.8.0_252-8u252-b09-1~18.04-b09
+1 💚	checkstyle	2m 54s	trunk passed
+1 💚	mvnsite	3m 54s	trunk passed
+1 💚	shadedclient	22m 36s	branch has no errors when building and testing our client artifacts.
-1 ❌	javadoc	0m 37s	hadoop-common in trunk failed with JDK Ubuntu-11.0.7+10-post-Ubuntu-2ubuntu218.04.
-1 ❌	javadoc	0m 43s	hadoop-hdfs-client in trunk failed with JDK Ubuntu-11.0.7+10-post-Ubuntu-2ubuntu218.04.
-1 ❌	javadoc	0m 42s	hadoop-hdfs in trunk failed with JDK Ubuntu-11.0.7+10-post-Ubuntu-2ubuntu218.04.
+1 💚	javadoc	2m 28s	trunk passed with JDK Private Build-1.8.0_252-8u252-b09-1~18.04-b09
+0 🆗	spotbugs	3m 12s	Used deprecated FindBugs config; considering switching to SpotBugs.
+1 💚	findbugs	7m 47s	trunk passed
		_ Patch Compile Tests _
+0 🆗	mvndep	0m 22s	Maven dependency ordering for patch
-1 ❌	mvninstall	0m 29s	hadoop-common in the patch failed.
-1 ❌	mvninstall	0m 37s	hadoop-hdfs-client in the patch failed.
-1 ❌	mvninstall	0m 37s	hadoop-hdfs in the patch failed.
-1 ❌	compile	0m 59s	root in the patch failed with JDK Ubuntu-11.0.7+10-post-Ubuntu-2ubuntu218.04.
-1 ❌	cc	0m 59s	root in the patch failed with JDK Ubuntu-11.0.7+10-post-Ubuntu-2ubuntu218.04.
-1 ❌	javac	0m 59s	root in the patch failed with JDK Ubuntu-11.0.7+10-post-Ubuntu-2ubuntu218.04.
-1 ❌	compile	0m 52s	root in the patch failed with JDK Private Build-1.8.0_252-8u252-b09-1~18.04-b09.
-1 ❌	cc	0m 52s	root in the patch failed with JDK Private Build-1.8.0_252-8u252-b09-1~18.04-b09.
-1 ❌	javac	0m 52s	root in the patch failed with JDK Private Build-1.8.0_252-8u252-b09-1~18.04-b09.
+1 💚	checkstyle	2m 41s	the patch passed
-1 ❌	mvnsite	0m 30s	hadoop-common in the patch failed.
-1 ❌	mvnsite	0m 39s	hadoop-hdfs-client in the patch failed.
-1 ❌	mvnsite	0m 39s	hadoop-hdfs in the patch failed.
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
-1 ❌	shadedclient	0m 42s	patch has errors when building and testing our client artifacts.
-1 ❌	javadoc	0m 22s	hadoop-common in the patch failed with JDK Ubuntu-11.0.7+10-post-Ubuntu-2ubuntu218.04.
-1 ❌	javadoc	0m 30s	hadoop-hdfs-client in the patch failed with JDK Ubuntu-11.0.7+10-post-Ubuntu-2ubuntu218.04.
-1 ❌	javadoc	0m 28s	hadoop-hdfs in the patch failed with JDK Ubuntu-11.0.7+10-post-Ubuntu-2ubuntu218.04.
+1 💚	javadoc	1m 47s	the patch passed with JDK Private Build-1.8.0_252-8u252-b09-1~18.04-b09
-1 ❌	findbugs	0m 29s	hadoop-common in the patch failed.
-1 ❌	findbugs	0m 37s	hadoop-hdfs-client in the patch failed.
-1 ❌	findbugs	0m 37s	hadoop-hdfs in the patch failed.
		_ Other Tests _
-1 ❌	unit	0m 28s	hadoop-common in the patch failed.
-1 ❌	unit	0m 38s	hadoop-hdfs-client in the patch failed.
-1 ❌	unit	0m 37s	hadoop-hdfs in the patch failed.
+1 💚	asflicense	0m 26s	The patch does not generate ASF License warnings.
		134m 19s

Subsystem	Report/Notes
Docker	ClientAPI=1.40 ServerAPI=1.40 base: https://builds.apache.org/job/hadoop-multibranch/job/PR-2109/1/artifact/out/Dockerfile
GITHUB PR	#2109
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle cc prototool
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javadoc	https://builds.apache.org/job/hadoop-multibranch/job/PR-2109/1/artifact/out/patch-javadoc-hadoop-hdfs-project_hadoop-hdfs-client-jdkUbuntu-11.0.7+10-post-Ubuntu-2ubuntu218.04.txt
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Max. process+thread count	308 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs-client hadoop-hdfs-project/hadoop-hdfs U: .
Console output	https://builds.apache.org/job/hadoop-multibranch/job/PR-2109/1/console
versions	git=2.17.1 maven=3.6.0 findbugs=3.1.0-RC1
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