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https://issues.apache.org/jira/browse/HDDS-1400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16840642#comment-16840642
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Bharat Viswanadham commented on HDDS-1400:
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Moving this out, as the design to handle write requests is changed.
> Convert all OM Key related operations to HA model
> -------------------------------------------------
>
> Key: HDDS-1400
> URL: https://issues.apache.org/jira/browse/HDDS-1400
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Reporter: Bharat Viswanadham
> Assignee: Bharat Viswanadham
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.5.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> In this jira, we shall convert all OM related operations to OM HA model,
> which is a 2 step.
> # StartTransaction, where we validate request and check for any errors and
> return the response.
> # ApplyTransaction, where original OM request will have a response which
> needs to be applied to OM DB. This step is just to apply response to Om DB.
> In this way, all requests which are failed with like volume not found or some
> conditions which are not satisfied like when Key not found during rename,
> these all will be executed during startTransaction, and if it fails these
> requests will not be written to raft log also.
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