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From "Shashikant Banerjee (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDDS-676) Enable Read from open Containers via Standalone Protocol
Date Mon, 22 Oct 2018 10:16:00 GMT

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

Shashikant Banerjee updated HDDS-676:
-------------------------------------
    Attachment: HDDS-676.007.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, HDDS-676.002.patch, HDDS-676.003.patch, HDDS-676.004.patch,
HDDS-676.005.patch, HDDS-676.006.patch, HDDS-676.007.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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