Hi, > The 2.4 release will include a major upgrade in the lttng-relayd to > support live trace viewing. > The trace viewers will be able to connect to a new TCP port on the relay > to list the tracing sessions currently established, attach to a session, > receive all the streams for this session, and then ask for metadata and > trace packets.
Is relayd going to be the only way that a viewer can achieve this? I'm actually only interested in having libbabeltrace be able to read the trace up to the last valid event at a specific time, and not interested in "live" viewing of the events as they happen. Thanks, Amit Margalit IBM XIV - Storage Reinvented XIV-NAS Development Team Tel. 03-689-7774 Fax. 03-689-7230 From: Julien Desfossez <[email protected]> To: Dror Granot <[email protected]> Cc: "[email protected]" <[email protected]> Date: 09/04/2013 05:32 PM Subject: Re: [lttng-dev] Request information on "Live" view of traces Hi, [...] > >> I would really appreciate if you can update me on the time frame of "live" >> view of traces. If you know, what will it include and when it is supposed to >> be, it can help us much in our decision. The 2.4 release will include a major upgrade in the lttng-relayd to support live trace viewing. The trace viewers will be able to connect to a new TCP port on the relay to list the tracing sessions currently established, attach to a session, receive all the streams for this session, and then ask for metadata and trace packets. The live trace reading mechanism offers guarantees that the viewer can never be in a position where it has to assume that it can read the trace safely. It is forced to fetch all the metadata before being able to read the trace and it receives information on all streams at a regular interval (user-defined). Along with this release of lttng-tools, we will provide a reference client in C for Babeltrace that will handle this new protocol. As of now, the live trace reading is working as a prototype in my development branches on github, if you want to try them I can send you the details, but I don't have much time to provide support on these branches. I will send updates on this mailing-list as soon as I consider this feature ready to test. I hope it answers your question, if you want more details, please don't hesitate to ask. Thanks, Julien _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
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