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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11493) Ozone: SCM: Add the ability to handle container reports
Date Tue, 02 May 2017 17:46:04 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Anu Engineer updated HDFS-11493:
    Attachment: exploring-scalability-scm.pdf

During the review of this JIRA, both [~cheersyang] and [~yuanbo] expressed concerns about
the scalability limits of SCM. This is something that I have spend time thinking about myself.
So this attached document captures a set of constraints for SCM and what size limits we will
have in the first release of Ozone/SCM. 

This is a list of items that I have kept track of in terms of SCM's scalability. I look forward
to your comments, questions and other feedback.

> Ozone: SCM:  Add the ability to handle container reports 
> ---------------------------------------------------------
>                 Key: HDFS-11493
>                 URL: https://issues.apache.org/jira/browse/HDFS-11493
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>    Affects Versions: HDFS-7240
>            Reporter: Anu Engineer
>            Assignee: Anu Engineer
>         Attachments: container-replication-storage.pdf, exploring-scalability-scm.pdf,
HDFS-11493-HDFS-7240.001.patch, HDFS-11493-HDFS-7240.002.patch, HDFS-11493-HDFS-7240.003.patch
> Once a datanode sends the container report it is SCM's responsibility to determine if
the replication levels are acceptable. If it is not, SCM should initiate a replication request
to another datanode. This JIRA tracks how SCM  handles a container report.

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