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https://issues.apache.org/jira/browse/CASSANDRA-20317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17926060#comment-17926060
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Abe Ratnofsky commented on CASSANDRA-20317:
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What are you looking to accomplish?
You could use Netty's setRawOpt to set DSCP's SO_PRIORITY option, but that's a
hint and not necessarily respected by the kernel or intermediary systems:
[https://netty.io/4.1/api/io/netty/channel/unix/Socket.html#setRawOpt-int-int-java.nio.ByteBuffer-]
Also note that internode verbs already have a priority system:
[https://github.com/apache/cassandra/blob/511bd203144a71bf0a72876a393d186a9778407e/src/java/org/apache/cassandra/net/Verb.java#L273]
You could use SO_MARK to make tc easier to configure, but that requires
CAP_NET_ADMIN or CAP_NET_RAW, which we don't currently require for deployments.
> Set traffic classes on network traffic
> --------------------------------------
>
> Key: CASSANDRA-20317
> URL: https://issues.apache.org/jira/browse/CASSANDRA-20317
> Project: Apache Cassandra
> Issue Type: New Feature
> Reporter: Tommy Stendahl
> Assignee: Tommy Stendahl
> Priority: Normal
>
> I would like to add the possibility to set traffic classes on network traffic
> from Cassandra. I was thinking of one value for traffic from the native port
> and different values for inbound and outbound internode traffic. To configure
> this in the yaml file I like to add something like this:
> {quote} # Set traffic classes in IP packages
> #
> # Traffic classes can be used to separate traffic in a network into
> individual flows
> # and queue, police and shape them differently.
> # traffic_classes:
> # enabled: false
> # native_tc: 0
> # internode_outbound_tc: 0
> # internode_inbound_tc: 0{quote}
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