> I guess that you are mostly interested in making sure your traces are > readable after a crash from the system that produces them, right ?
That is a concern, yes. Additionally, I would like to make sure that I can safely view events on a running system up to (close to) the end. Plus - I rather not have to use relayd to do this. Amit Margalit IBM XIV - Storage Reinvented XIV-NAS Development Team Tel. 03-689-7774 Fax. 03-689-7230 From: Mathieu Desnoyers <[email protected]> To: Amit Margalit/Israel/IBM@IBMIL Cc: Julien Desfossez <[email protected]>, "[email protected]" <[email protected]>, Dror Granot <[email protected]> Date: 09/10/2013 05:38 PM Subject: Re: [lttng-dev] Request information on "Live" view of traces On 10/09/13 03:45 AM, Amit Margalit wrote: > 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. I guess that you are mostly interested in making sure your traces are readable after a crash from the system that produces them, right ? Thanks, Mathieu > > 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 > > > > > _______________________________________________ > lttng-dev mailing list > [email protected] > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
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