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https://issues.apache.org/jira/browse/HDDS-8211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HDDS-8211:
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Labels: pull-request-available (was: )
> S3 QoS
> ------
>
> Key: HDDS-8211
> URL: https://issues.apache.org/jira/browse/HDDS-8211
> Project: Apache Ozone
> Issue Type: New Feature
> Components: S3
> Reporter: Mohanad Elsafty
> Assignee: Mohanad Elsafty
> Priority: Major
> Labels: pull-request-available
> Attachments: image.png
>
>
> The target of QoS is to give all the users the opportunity to use S3Gateway
> even during periods of high load by limiting users making too many requests
> so the service becomes available for everyone.
>
> The idea is taken from "{*}Apache Hadoop Fair Call Queue{*}"
>
> !image.png|width=642,height=181!
>
> * Users will be making requests to S3Gateway which is intercepted by
> *ThrottlerFilter* that takes action whether to proceed with this request or
> reject it with the help of a scheduler.
> * At the moment there is one usable scheduler implementation
> *DecayRequestScheduler.*
> * *DecayRequestScheduler* keeps information about each user making requests
> and the availability of s3gateway handlers.
> * If all handlers are busy and some users are making too many requests it
> will start rejecting incoming requests with "{*}Service Unavailable{*}"
> response.
> * It also decays the number of user's requests count over the time.
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