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https://issues.apache.org/jira/browse/HDFS-10690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15397798#comment-15397798
]
Hadoop QA commented on HDFS-10690:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
14s{color} | {color:blue} Docker mode activated. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green} 0m
0s{color} | {color:green} The patch appears to include 3 new or modified test
files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m
8s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 6m
45s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
31s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
36s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
33s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
29s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 3m
13s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
23s{color} | {color:green} trunk passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m
7s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m
23s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
25s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m
25s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}
0m 30s{color} | {color:orange} hadoop-hdfs-project: The patch generated 17 new
+ 196 unchanged - 2 fixed = 213 total (was 198) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
32s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
23s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 1m
55s{color} | {color:red} hadoop-hdfs-project/hadoop-hdfs-client generated 1 new
+ 0 unchanged - 0 fixed = 1 total (was 0) {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
20s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m
0s{color} | {color:green} hadoop-hdfs-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 76m 37s{color}
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red} 0m
19s{color} | {color:red} The patch generated 1 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}106m 8s{color} |
{color:black} {color} |
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|| Reason || Tests ||
| FindBugs | module:hadoop-hdfs-project/hadoop-hdfs-client |
| | Suspicious comparison of Long references in
org.apache.hadoop.hdfs.shortcircuit.LruList.containsKey(Long) At
LruList.java:in org.apache.hadoop.hdfs.shortcircuit.LruList.containsKey(Long)
At LruList.java:[line 153] |
| Failed junit tests | hadoop.hdfs.TestRollingUpgrade |
| | hadoop.hdfs.server.datanode.TestDataNodeErasureCodingMetrics |
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|| Subsystem || Report/Notes ||
| Docker | Image:yetus/hadoop:9560f25 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12820708/lrulist.patch |
| JIRA Issue | HDFS-10690 |
| Optional Tests | asflicense compile javac javadoc mvninstall mvnsite
unit findbugs checkstyle |
| uname | Linux f13ea27f1665 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed
Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh
|
| git revision | trunk / 7f3c306 |
| Default Java | 1.8.0_101 |
| findbugs | v3.0.0 |
| checkstyle |
https://builds.apache.org/job/PreCommit-HDFS-Build/16236/artifact/patchprocess/diff-checkstyle-hadoop-hdfs-project.txt
|
| findbugs |
https://builds.apache.org/job/PreCommit-HDFS-Build/16236/artifact/patchprocess/new-findbugs-hadoop-hdfs-project_hadoop-hdfs-client.html
|
| unit |
https://builds.apache.org/job/PreCommit-HDFS-Build/16236/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/16236/testReport/ |
| asflicense |
https://builds.apache.org/job/PreCommit-HDFS-Build/16236/artifact/patchprocess/patch-asflicense-problems.txt
|
| modules | C: hadoop-hdfs-project/hadoop-hdfs-client
hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project |
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/16236/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT http://yetus.apache.org |
This message was automatically generated.
> Optimize insertion/removal of replica in ShortCircuitCache.java
> ---------------------------------------------------------------
>
> Key: HDFS-10690
> URL: https://issues.apache.org/jira/browse/HDFS-10690
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Affects Versions: 3.0.0-alpha2
> Reporter: Fenghua Hu
> Assignee: Fenghua Hu
> Attachments: HDFS-10690.001.patch
>
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> Currently in ShortCircuitCache, two TreeMap objects are used to track the
> cached replicas.
> private final TreeMap<Long, ShortCircuitReplica> evictable = new TreeMap<>();
> private final TreeMap<Long, ShortCircuitReplica> evictableMmapped = new
> TreeMap<>();
> TreeMap employs Red-Black tree for sorting. This isn't an issue when using
> traditional HDD. But when using high-performance SSD/PCIe Flash, the cost
> inserting/removing an entry becomes considerable.
> To mitigate it, we designed a new list-based for replica tracking.
> The list is a double-linked FIFO. FIFO is time-based, thus insertion is a
> very low cost operation. On the other hand, list is not lookup-friendly. To
> address this issue, we introduce two references into ShortCircuitReplica
> object.
> ShortCircuitReplica next = null;
> ShortCircuitReplica prev = null;
> In this way, lookup is not needed when removing a replica from the list. We
> only need to modify its predecessor's and successor's references in the lists.
> Our tests showed up to 15-50% performance improvement when using PCIe flash
> as storage media.
> The original patch is against 2.6.4, now I am porting to Hadoop trunk, and
> patch will be posted soon.
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