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https://issues.apache.org/jira/browse/HDDS-426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16609629#comment-16609629
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Xiaoyu Yao commented on HDDS-426:
---------------------------------
Thanks [~dineshchitlangia] for reporting the issue. The reason that we don't
want to track the modification time at volume bucket level is because the cost
might be too high (lock contention, metadata update etc.) If we really want to
enable this, we should make this optional and off by default.
> Add field modificationTime for Volume and Bucket
> ------------------------------------------------
>
> Key: HDDS-426
> URL: https://issues.apache.org/jira/browse/HDDS-426
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Components: Ozone Manager
> Reporter: Dinesh Chitlangia
> Assignee: Dinesh Chitlangia
> Priority: Major
> Fix For: 0.3.0
>
>
> There are update operations that can be performed for Volume, Bucket and Key.
> While Key records the modification time, Volume and & Bucket do not capture
> this.
>
> This Jira proposes to add the required field to Volume and Bucket in order to
> capture the modficationTime.
>
> Current Status:
> {noformat}
> hadoop@1987b5de4203:~$ ./bin/ozone oz -infoVolume /dummyvol
> 2018-09-10 17:16:12 WARN NativeCodeLoader:60 - Unable to load native-hadoop
> library for your platform... using builtin-java classes where applicable
> {
> "owner" : {
> "name" : "bilbo"
> },
> "quota" : {
> "unit" : "TB",
> "size" : 1048576
> },
> "volumeName" : "dummyvol",
> "createdOn" : "Mon, 10 Sep 2018 17:11:32 GMT",
> "createdBy" : "bilbo"
> }
> hadoop@1987b5de4203:~$ ./bin/ozone oz -infoBucket /dummyvol/mybuck
> 2018-09-10 17:15:25 WARN NativeCodeLoader:60 - Unable to load native-hadoop
> library for your platform... using builtin-java classes where applicable
> {
> "volumeName" : "dummyvol",
> "bucketName" : "mybuck",
> "createdOn" : "Mon, 10 Sep 2018 17:12:09 GMT",
> "acls" : [ {
> "type" : "USER",
> "name" : "hadoop",
> "rights" : "READ_WRITE"
> }, {
> "type" : "GROUP",
> "name" : "users",
> "rights" : "READ_WRITE"
> }, {
> "type" : "USER",
> "name" : "spark",
> "rights" : "READ_WRITE"
> } ],
> "versioning" : "DISABLED",
> "storageType" : "DISK"
> }
> hadoop@1987b5de4203:~$ ./bin/ozone oz -infoKey /dummyvol/mybuck/myk1
> 2018-09-10 17:19:43 WARN NativeCodeLoader:60 - Unable to load native-hadoop
> library for your platform... using builtin-java classes where applicable
> {
> "version" : 0,
> "md5hash" : null,
> "createdOn" : "Mon, 10 Sep 2018 17:19:04 GMT",
> "modifiedOn" : "Mon, 10 Sep 2018 17:19:04 GMT",
> "size" : 0,
> "keyName" : "myk1",
> "keyLocations" : [ ]
> }{noformat}
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