[lttng-dev] Lttng live protocol

[Mayur Patel]

Thank you for the information!

On Wed, 15 Sept 2021 at 17:00, Mathieu Desnoyers <
mathieu.desnoyers at efficios.com> wrote:

>
> ----- On Sep 1, 2021, at 1:23 PM, lttng-dev <lttng-dev at lists.lttng.org>
> wrote:
>
> Hi there,
>
> I am currently evaluating the use of CTF and lttng tooling for application
> tracing on windows. We are exploring alternatives to ETW that are more
> customisable.
> One thing we would really like to do is real-time monitoring of our
> application from another machine. I have a few questions regarding this:
>
> 1. Is lttng live protocol suitable for this purpose? What kind of latency
> would we expect? (e.g 10s or 100s of milliseconds or more)
>
>
> The lttng live protocol has been designed for extracting a low-throughput
> of events to a live pretty-printer, with delays in the area of
> a few seconds. It's a polling-based mechanism at the moment.
>
> 2. Is the protocol documented?
>
>
> No. There is only an implementation with the lttng project and in
> babeltrace.
>
> 3. Is it possible to use lttng-relayd to read from local CTF log files
> (which are being written to) and stream events to other machines / a viewer
> on the same machine? The reason I ask this is the documentation seems
> suggests lttng-relayd can consume CTF files
> https://lttng.org/docs/v2.13/#doc-lttng-relayd.
>
>
> lttng-relayd needs to control both writing to the CTF log files and
> reading from them. The "writing to"
> cannot be done by an external process.
>
> 4. I see there is a windows cygwin build on jenkins. Would you recommend
> this for production use?
>
>
> We do not recommend Cygwin builds for production use unless there are no
> alternatives. From my own
> past experience, the Cygwin layer is not a solid basis for
> production-quality software.
>
> Thanks for your interest,
>
> Mathieu
>
>
> Any guidance would be much appreciated.
>
> Thanks in advance,
>
> Mayur
>
> --
>
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>
> Mayur Patel
>
> Lead Software Engineer
>
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>
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> --
> Mathieu Desnoyers
> EfficiOS Inc.
> http://www.efficios.com
>


Mayur Patel
Lead Software Engineer
+44 20 7234 9840
88-89 Blackfriars Road, London, SE1 8HA
 
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