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https://issues.apache.org/jira/browse/HDFS-13108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16366760#comment-16366760
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genericqa commented on HDFS-13108:
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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
0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 5s{color}
| {color:red} HDFS-13108 does not apply to HDFS-7240. Rebase required? Wrong
Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HDFS-13108 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12910897/HDFS-13108-HDFS-7240.004.patch
|
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/23095/console |
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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,
> HDFS-13108-HDFS-7240.004.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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