lttng-create(1)
===============
-:revdate: 3 May 2021
+:revdate: 12 May 2021
NAME
recover the latest recorded trace data when the system reboots after a
crash with the man:lttng-crash(1) utility.
-By default, the `create` command automatically spawns a session daemon
-for your Unix user if none is currently running. Override the path of
-the session daemon binary to spawn with the general
-genoption:--sessiond-path option. Avoid automatically spawning a session
-daemon with the general genoption:--no-sessiond option.
+By default, the `create` command automatically spawns:
+
+* A session daemon for your Unix user if none is currently running.
++
+Override the path of the session daemon binary to spawn with the
+general genoption:--sessiond-path option.
++
+Avoid automatically spawning a session daemon with the general
+genoption:--no-sessiond option.
+
+* A relay daemon (see man:lttng-relayd(8)) if all the following
+ statements are true:
++
+--
+* You specify the option:--live option.
+
+* You don't specify any of the option:--set-url, option:--ctrl-url, or
+ option:--data-url options.
+
+* No relay daemon is currently listening for TCP connections on
+ +127.0.0.1:{default_network_viewer_port}+ (default LTTng live reader
+ connection address and port).
+--
++
+In this case, the `create` command spawns a relay daemon as such:
++
+[verse]
+*lttng-relayd* nloption:--live-port=**tcp://localhost:{default_network_viewer_port}**
+{nbsp}
++
+Override the path of the relay daemon binary to spawn with the general
+genoption:--relayd-path option.
On success, the `create` command sets the current tracing session (see
man:lttng-concepts(7) to learn more) to the created tracing session.
lttng(1)
========
-:revdate: 3 May 2021
+:revdate: 12 May 2021
NAME
--------
[verse]
*lttng* [option:--group='GROUP'] [option:--mi=**xml**] [option:--no-sessiond | option:--sessiond-path='PATH']
- [option:--quiet | option:-verbose...] '<<commands,COMMAND>>' ['COMMAND OPTIONS']
+ [option:--relayd-path='PATH'] [option:--quiet | option:-verbose...]
+ '<<commands,COMMAND>>' ['COMMAND OPTIONS']
DESCRIPTION
* Sends asynchronous notifications to user applications.
-By default, the man:lttng-create(1) command automatically spawns a
-session daemon for your Unix user if none is currently running. Override
-the path of the session daemon binary to spawn with the
-option:--sessiond-path option. Avoid automatically spawning a session
-daemon with the option:--no-sessiond option.
+By default, the man:lttng-create(1) command automatically spawns:
+
+* A session daemon for your Unix user if none is currently running.
++
+Override the path of the session daemon binary to spawn with the
+option:--sessiond-path option.
++
+Avoid automatically spawning a session daemon with the
+option:--no-sessiond option.
+
+* A relay daemon (see man:lttng-relayd(8)) if all the following
+ statements are true:
++
+--
+* You specify the nloption:--live option.
+
+* You don't specify any of the nloption:--set-url, nloption:--ctrl-url,
+ or nloption:--data-url options.
+
+* No relay daemon is currently listening for TCP connections on
+ +127.0.0.1:{default_network_viewer_port}+ (default LTTng live reader
+ connection address and port).
+--
++
+Override the path of the relay daemon binary to spawn with the
+option:--relayd-path option.
NOTE: The LTTng project recommends that you start the session daemon at
boot time for stable and long-term tracing.
+
You may :not: use this option with the option:--no-sessiond option.
+option:--relayd-path='PATH'::
+ Set the absolute path of the relay daemon binary to spawn from the
+ man:lttng-create(1) command to 'PATH'.
+
option:-v, option:--verbose::
Increase verbosity.
+