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Posted to hdfs-issues@hadoop.apache.org by "Shashikant Banerjee (JIRA)" <ji...@apache.org> on 2018/10/17 22:16:00 UTC

[jira] [Updated] (HDDS-676) Enable Read from open Containers via Standalone Protocol

     [ https://issues.apache.org/jira/browse/HDDS-676?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shashikant Banerjee updated HDDS-676:
-------------------------------------
    Attachment: HDDS-676.001.patch

> Enable Read from open Containers via Standalone Protocol
> --------------------------------------------------------
>
>                 Key: HDDS-676
>                 URL: https://issues.apache.org/jira/browse/HDDS-676
>             Project: Hadoop Distributed Data Store
>          Issue Type: Bug
>            Reporter: Shashikant Banerjee
>            Assignee: Shashikant Banerjee
>            Priority: Major
>         Attachments: HDDS-676.001.patch
>
>
> With BlockCommitSequenceId getting updated per block commit on open containers in OM as well datanode, Ozone Client reads can through Standalone protocol not necessarily requiring Ratis. Client should verify the BCSID of the container which has the data block , which should always be greater than or equal to the BCSID of the block to be read and the existing block BCSID should exactly match that of the block to be read. As a part of this, Client can try to read from a replica with a supplied BCSID and failover to the next one in case the block does ont exist on one replica.



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