[Bug server/14755] New: Feature Request: Have ability to send data over network in Flight recorder mode

[Bug server/14755] New: Feature Request: Have ability to send data over network in Flight recorder mode

[bugzilla at smetj dot net]

http://sourceware.org/bugzilla/show_bug.cgi?id=14755

             Bug #: 14755
           Summary: Feature Request: Have ability to send data over
                    network in Flight recorder mode
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: server
        AssignedTo: systemtap@sourceware.org
        ReportedBy: bugzilla@smetj.net
    Classification: Unclassified


Hi,

The motivation for being able to transmit data over network using a simple
network protocol is that it would make life easier to centralize 
a large amount of metrics from a large amount of hosts.
It's also not required to foresee any local disk space nor memory to store
data, which could be handy on vm environments with a higher guest density.
I would *personally* find UDP more than sufficient, it would also be less
intrusive or blocking for stap when the remote destination isn't available.

There's a performance gain when writing directly to a socket using proper
buffering compared to redirecting stdout to another process in order to send
stap output over network.  This small poc is in Python but should be relevant
nevertheless: https://gist.github.com/3935398

Besides that it's from an sysadmin point of view cleaner to have network
support built in?  One less dependency, native support, no wrapper scripts
required.

Thanks,

Jelle

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[Bug server/14755] Feature Request: Have ability to send data over network in Flight recorder mode

[fche at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=14755

Frank Ch. Eigler <fche at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |fche at redhat dot com
         Resolution|---                         |WONTFIX

--- Comment #1 from Frank Ch. Eigler <fche at redhat dot com> ---
a connection direct from kernel space is unlikely; we have "stap --remote ..."
now to transport traffic across ssh.  That is admittedly worse for performance
than UDP, but is simpler.

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