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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11926) Ozone: Implement a common helper to return a range of KVs in levelDB
Date Wed, 07 Jun 2017 05:52:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16040237#comment-16040237

Weiwei Yang commented on HDFS-11926:

I see, it sounds like a good idea to remain with the snapshot approach for now as the overhead
is trivial. Given we have the time metrics, if in future we hit any performance issue, we
can revisit this. Or if we decide to switch to rocksDB. Thanks for all the ideas [~anu], [~xyao].

> Ozone: Implement a common helper to return a range of KVs in levelDB
> --------------------------------------------------------------------
>                 Key: HDFS-11926
>                 URL: https://issues.apache.org/jira/browse/HDFS-11926
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>            Priority: Blocker
>         Attachments: HDFS-11926-HDFS-7240.001.patch, HDFS-11926-HDFS-7240.002.patch,
HDFS-11926-HDFS-7240.003.patch, HDFS-11926-HDFS-7240.004.patch
> There are quite some *LIST* operations need to get a range of keys or values from levelDB,
and filter entries with key prefix. 
> # HDFS-11782 listKeys
> # HDFS-11779 listBuckets
> # HDFS-11773 listVolumes
> # HDFS-11679 listContainers
> we need to implement a common utility for them.

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