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https://issues.apache.org/jira/browse/CASSANDRA-15219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17520594#comment-17520594
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Jon Meredith commented on CASSANDRA-15219:
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I really like the idea of offloading moving bits around to the kernel, but I
was wondering how would sendfile integrate with
{{stream_throughput_outbound_megabits_per_sec}} and {{
inter_dc_stream_throughput_outbound_megabits_per_sec}}? And would it only be
for the {{Epoll}} ?
> Use sendFile for streaming partial files
> ----------------------------------------
>
> Key: CASSANDRA-15219
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15219
> Project: Cassandra
> Issue Type: Improvement
> Components: Consistency/Streaming
> Reporter: Benedict Elliott Smith
> Assignee: Adverg Ebashinskii
> Priority: Normal
> Fix For: 4.x
>
>
> In the case of compressed files, sendFile is a drop-in replacement for our
> current buffered reads/writes. For uncompressed files, we probably want to
> only optionally compress them for streaming, as in many cases CPU will
> constrain more than the network, particularly to a local replica. In the
> case that we need to compress, we can add a pipeline to the Netty handler to
> compress the whole stream.
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