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https://issues.apache.org/jira/browse/HDDS-16323?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HDDS-16323:
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Labels: pull-request-available (was: )
> StreamBlockInputStream: refill the pre-read window in bulk instead of once
> per response
> ---------------------------------------------------------------------------------------
>
> Key: HDDS-16323
> URL: https://issues.apache.org/jira/browse/HDDS-16323
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: Ozone Datanode
> Affects Versions: 2.2.1
> Reporter: Sergey Soldatov
> Assignee: Sergey Soldatov
> Priority: Major
> Labels: pull-request-available
>
> When streaming block reads are enabled, the client sends a new ReadBlock
> request after almost every response, even though it has already requested a
> large pre-read window.
> With the default settings, this can mean one extra request for each 1 MiB
> response during a sequential read. Each request makes the datanode repeat
> request processing and block metadata lookup work, increasing CPU use and
> slowing large downloads.
> The client should avoid these unnecessary top-up requests while it still has
> enough data already requested.
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