----- On Sep 1, 2021, at 1:23 PM, lttng-dev <lttng-dev@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

--

Mayur Patel

Lead Software Engineer

T : +44 20 7234 9840

M : +44 7342 180127

A : 88-89 Blackfriars Road, London, SE1 8HA



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--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com