[jira] [Commented] (CASSANDRA-7951) Add a Keep Alive operation to the Native Protocol

["Michaël Figuière (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-7951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14137029#comment-14137029 ] 

Michaël Figuière commented on CASSANDRA-7951:
---------------------------------------------

A way to do it with the current specification of the protocol is to send an {{OPTIONS}} message, but this force the server to answer with a more complex response and it seems that we have enough room to spend an opcode on this specific requirement...

> Add a Keep Alive operation to the Native Protocol
> -------------------------------------------------
>
>                 Key: CASSANDRA-7951
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7951
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Michaël Figuière
>            Priority: Minor
>              Labels: protocolv4
>
> Socket level keep-alive option doesn't seem to bring a strong enough guarantee that the connection won't be dropped as some OS or Firewall level settings might force some different behavior.
> To simplify things and bring the strong guarantee on this point that users expect, it would be interesting to add a {{NOOP}} or {{KEEPALIVE}}.
> Note that we could also turn it into a {{HEARTBEAT}} operation that would expect a response from the server to allow client to regularly probe for Cassandra node health in situation where the queries traffic is too low to bring this probing implicitly.



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