----- On Apr 22, 2020, at 2:18 PM, Sergei Dyshel qyron.priv...@gmail.com wrote:
> Thanks! I really missed this feature somehow. > > However I see that passing 0 as "tracefile size" will remove size > limitation. Is it possible to disable CTF trace writing altogether? No, because the relay daemon uses the on-disk files as intermediate storage between the receiving end and the part interacting with live viewers. Note that https://bugs.lttng.org/issues/1182 tracks a known issue where the relay daemon mishandles tracefile-count == 0 and tracefile-size != 0. It has not been a priority to fix this issue so far. Thanks, Mathieu > -- > Regards, > Sergei Dyshel > > On Wed, Apr 22, 2020 at 2:15 AM Mathieu Desnoyers > <mathieu.desnoy...@efficios.com> wrote: >> >> ----- On Apr 21, 2020, at 5:37 PM, Sergei Dyshel qyron.priv...@gmail.com >> wrote: >> >> [...] >> > >> >> Considering that there are few compelling use-cases for using both >> >> features together, and no customer have expressed interest in this, >> >> it is not part of our roadmap. >> > >> > Here is my case: I'm using LTTNG for continuous tracing during the >> > whole system timeline, >> > generating pretty big volume of traces. >> > >> > I'm using live and session and Babeltrace2 plugin which converts >> > processes these traces, >> > converts them to text and stores them >> > in some text file to which I apply "logrotate" so that old traces are >> > archived when needed. >> > >> > However, as I see, "lttng-relayd" also writes binary traces in CTF >> > from to some directory, never discarding old traces. So assuming >> > system long runtime this directory is going to eat all the free space >> > sometime?! Rotation would allow me to discard old archives just as >> > "logrotate" does. How else can I discard old CTF files? >> >> The feature you need is called "tracefile rotation", with the channel >> attributes "tracefile count" and "tracefile size". It was implemented at >> the same time as the live mode for exactly the purpose you describe. >> >> See https://lttng.org/docs/#doc-tracefile-rotation for more information. >> >> Thanks, >> >> Mathieu >> >> -- >> Mathieu Desnoyers >> EfficiOS Inc. > > http://www.efficios.com -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
