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From "Mukul Kumar Singh (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11443) Ozone: Support SCM multiple instance for HA
Date Thu, 15 Jun 2017 08:13:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Mukul Kumar Singh updated HDFS-11443:
    Attachment:     (was: HDFS-11972-HDFS-7240.001.patch)

> Ozone: Support SCM multiple instance for HA
> -------------------------------------------
>                 Key: HDFS-11443
>                 URL: https://issues.apache.org/jira/browse/HDFS-11443
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>    Affects Versions: HDFS-7240
>            Reporter: Anu Engineer
>            Assignee: Anu Engineer
>             Fix For: HDFS-7240
> SCM clients are capable of talking to multiple SCMs. This is achieved by reading the
SCM config information or by one of the active SCM sending out the current set of machines
that make up the RAFT Quorum. 
> Currently we are not sending out the list of SCM machines dynamically, that is clients
read the SCM info only from the config files. This hurts cluster level HA since if a node
fails in the SCM RAFT ring, the operator should be able to add a new node for high availability
without having to do anything else.
> This JIRA is to track that membership change send updates to all datanodes, so they all
start talking to the newly added SCM node automatically.

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