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From "genericqa (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-13108) Ozone: OzoneFileSystem: Simplified url schema for Ozone File System
Date Tue, 13 Feb 2018 22:39:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16363170#comment-16363170
] 

genericqa commented on HDFS-13108:
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 26s{color} | {color:blue}
Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {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 2 new or modified test files. {color} |
|| || || || {color:brown} HDFS-7240 Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 17m 39s{color}
| {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 21s{color} |
{color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 15s{color}
| {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 24s{color} |
{color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 11m 38s{color}
| {color:green} branch has no errors when building and testing our client artifacts. {color}
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| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  0m 27s{color} |
{color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 18s{color} |
{color:green} HDFS-7240 passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 21s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 17s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 17s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 10s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 18s{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:green}+1{color} | {color:green} shadedclient {color} | {color:green} 12m 10s{color}
| {color:green} patch has no errors when building and testing our client artifacts. {color}
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| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  0m 32s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 16s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m 30s{color} | {color:green}
hadoop-ozone in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 21s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 47m 47s{color} | {color:black}
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:d11161b |
| JIRA Issue | HDFS-13108 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12910453/HDFS-13108-HDFS-7240.003.patch
|
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  shadedclient
 findbugs  checkstyle  |
| uname | Linux 7778ffbf7912 4.4.0-64-generic #85-Ubuntu SMP Mon Feb 20 11:50:30 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | HDFS-7240 / f3d07ef |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_151 |
| findbugs | v3.1.0-RC1 |
|  Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/23055/testReport/ |
| Max. process+thread count | 452 (vs. ulimit of 5500) |
| modules | C: hadoop-tools/hadoop-ozone U: hadoop-tools/hadoop-ozone |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/23055/console |
| Powered by | Apache Yetus 0.8.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Ozone: OzoneFileSystem: Simplified url schema for Ozone File System
> -------------------------------------------------------------------
>
>                 Key: HDFS-13108
>                 URL: https://issues.apache.org/jira/browse/HDFS-13108
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>    Affects Versions: HDFS-7240
>            Reporter: Elek, Marton
>            Assignee: Elek, Marton
>            Priority: Major
>         Attachments: HDFS-13108-HDFS-7240.001.patch, HDFS-13108-HDFS-7240.002.patch,
HDFS-13108-HDFS-7240.003.patch
>
>
> A. Current state
>  
> 1. The datanode host / bucket /volume should be defined in the defaultFS (eg.  o3://datanode:9864/test/bucket1)
> 2. The root file system points to the bucket (eg. 'dfs -ls /' lists all the keys from
the bucket1)
> It works very well, but there are some limitations.
> B. Problem one 
> The current code doesn't support fully qualified locations. For example 'dfs -ls o3://datanode:9864/test/bucket1/dir1'
is not working.
> C.) Problem two
> I tried to fix the previous problem, but it's not trivial. The biggest problem is that
there is a Path.makeQualified call which could transform unqualified url to qualified url.
This is part of the Path.java so it's common for all the Hadoop file systems.
> In the current implementations it qualifies an url with keeping the schema (eg. o3://
) and authority (eg: datanode: 9864) from the defaultfs and use the relative path as the end
of the qualified url. For example:
> makeQualfied(defaultUri=o3://datanode:9864/test/bucket1, path=dir1/file) will return
o3://datanode:9864/dir1/file which is obviously wrong (the good would be o3://datanode:9864/TEST/BUCKET1/dir1/file).
I tried to do a workaround with using a custom makeQualified in the Ozone code and it worked
from command line but couldn't work with Spark which use the Hadoop api and the original makeQualified
path.
> D.) Solution
> We should support makeQualified calls, so we can use any path in the defaultFS.
>  
> I propose to use a simplified schema as o3://bucket.volume/ 
> This is similar to the s3a  format where the pattern is s3a://bucket.region/ 
> We don't need to set the hostname of the datanode (or ksm in case of service discovery)
but it would be configurable with additional hadoop configuraion values such as fs.o3.bucket.buckename.volumename.address=http://datanode:9864
(this is how the s3a works today, as I know).
> We also need to define restrictions for the volume names (in our case it should not include
dot any more).
> ps: some spark output
> 2018-02-03 18:43:04 WARN  Client:66 - Neither spark.yarn.jars nor spark.yarn.archive
is set, falling back to uploading libraries under SPARK_HOME.
> 2018-02-03 18:43:05 INFO  Client:54 - Uploading resource file:/tmp/spark-03119be0-9c3d-440c-8e9f-48c692412ab5/__spark_libs__2440448967844904444.zip
-> o3://datanode:9864/user/hadoop/.sparkStaging/application_1517611085375_0001/__spark_libs__2440448967844904444.zip
> My default fs was o3://datanode:9864/test/bucket1, but spark qualified the name of the
home directory.
>  



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