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From "Sergio Bossa (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-9318) Bound the number of in-flight requests at the coordinator
Date Wed, 22 Jun 2016 20:05:16 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-9318?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sergio Bossa updated CASSANDRA-9318:
------------------------------------
    Attachment: limit.btm
                backpressure.png
                no_backpressure.png

> Bound the number of in-flight requests at the coordinator
> ---------------------------------------------------------
>
>                 Key: CASSANDRA-9318
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9318
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Local Write-Read Paths, Streaming and Messaging
>            Reporter: Ariel Weisberg
>            Assignee: Sergio Bossa
>         Attachments: backpressure.png, limit.btm, no_backpressure.png
>
>
> It's possible to somewhat bound the amount of load accepted into the cluster by bounding
the number of in-flight requests and request bytes.
> An implementation might do something like track the number of outstanding bytes and requests
and if it reaches a high watermark disable read on client connections until it goes back below
some low watermark.
> Need to make sure that disabling read on the client connection won't introduce other
issues.



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