|
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT VARIABLES | FILES | EXIT STATUS | BUGS | RESOURCES | COPYRIGHTS | THANKS | AUTHORS | SEE ALSO | COLOPHON |
LTTNG-LOAD(1) LTTng Manual LTTNG-LOAD(1)
lttng-load - Load LTTng tracing session configurations
lttng [GENERAL OPTIONS] load [--force] [--input-path=PATH]
[--override-url=URL] [SESSION [--override-name=NAME]]
The lttng load command loads the configurations of one or more
tracing sessions from files.
The lttng load command is used in conjunction with the lttng-save(1)
command to save and restore the complete configurations of tracing
sessions. This includes the enabled channels and event rules, the
context added to channels, the tracing activity, and more.
Once one or more tracing session configurations are loaded, they
appear exactly as they were saved from the user’s point of view.
The following directories are searched, non-recursively, in this
order for configuration files:
1. $LTTNG_HOME/.lttng/sessions ($LTTNG_HOME defaults to $HOME)
2. /usr/local/etc/lttng/sessions
The input path can be overridden with the --input-path option. When
this option is specified, the default directories are NOT searched
for configuration files. When it’s not specified, both default
directories are searched for configuration files.
If the input path is a directory, then:
· If SESSION is specified, the tracing session configuration named
SESSION is searched for in all the files of this directory and
loaded if found.
· If SESSION is not specified, the --all option is implicit: all
the tracing session configurations found in all the files in this
directory are loaded.
If the input path is a file, then:
· If SESSION is specified, the tracing session configuration named
SESSION is searched for in this file and loaded if found.
· If SESSION is not specified, the --all option is implicit: all
the tracing session configurations found in this file are loaded.
Aspects of the loaded configurations can be overridden at load time
using the --override-url and --override-name options.
By default, existing tracing sessions are not overwritten when
loading: the command fails. The --force option can be used to allow
this.
General options are described in lttng(1).
-a, --all
Load all tracing session configurations (default).
-f, --force
Overwrite existing tracing sessions when loading.
-i PATH, --input-path=PATH
Load tracing session configurations from PATH, either a directory
or a file, instead of loading them from the default search
directories.
--override-name=NAME
Override the name of the loaded tracing session configuration,
SESSION, with NAME.
You must specify a tracing session name to load (SESSION) and NOT
use the --all option when using this option.
--override-url=URL
Override the URL of the loaded tracing session configurations
with URL.
This is the equivalent of the --set-url option of
lttng-create(1). The validity of the URL override depends on the
type of tracing session configurations to load. This option
applies to all the loaded tracing session configurations.
Program information
-h, --help
Show command help.
This option, like lttng-help(1), attempts to launch /usr/bin/man
to view the command’s man page. The path to the man pager can be
overridden by the LTTNG_MAN_BIN_PATH environment variable.
--list-options
List available command options.
LTTNG_ABORT_ON_ERROR
Set to 1 to abort the process after the first error is
encountered.
LTTNG_HOME
Overrides the $HOME environment variable. Useful when the user
running the commands has a non-writable home directory.
LTTNG_MAN_BIN_PATH
Absolute path to the man pager to use for viewing help
information about LTTng commands (using lttng-help(1) or lttng
COMMAND --help).
LTTNG_SESSION_CONFIG_XSD_PATH
Path in which the session.xsd session configuration XML schema
may be found.
LTTNG_SESSIOND_PATH
Full session daemon binary path.
The --sessiond-path option has precedence over this environment
variable.
Note that the lttng-create(1) command can spawn an LTTng session
daemon automatically if none is running. See lttng-sessiond(8) for
the environment variables influencing the execution of the session
daemon.
$LTTNG_HOME/.lttngrc
User LTTng runtime configuration.
This is where the per-user current tracing session is stored
between executions of lttng(1). The current tracing session can
be set with lttng-set-session(1). See lttng-create(1) for more
information about tracing sessions.
$LTTNG_HOME/lttng-traces
Default output directory of LTTng traces. This can be overridden
with the --output option of the lttng-create(1) command.
$LTTNG_HOME/.lttng
User LTTng runtime and configuration directory.
$LTTNG_HOME/.lttng/sessions
Default location of saved user tracing sessions (see
lttng-save(1) and lttng-load(1)).
/usr/local/etc/lttng/sessions
System-wide location of saved tracing sessions (see lttng-save(1)
and lttng-load(1)).
Note
$LTTNG_HOME defaults to $HOME when not explicitly set.
0
Success
1
Command error
2
Undefined command
3
Fatal error
4
Command warning (something went wrong during the command)
If you encounter any issue or usability problem, please report it on
the LTTng bug tracker <https://bugs.lttng.org/projects/lttng-tools>.
· LTTng project website <http://lttng.org>
· LTTng documentation <http://lttng.org/docs>
· Git repositories <http://git.lttng.org>
· GitHub organization <http://github.com/lttng>
· Continuous integration <http://ci.lttng.org/>
· Mailing list <http://lists.lttng.org> for support and
development: lttng-dev@lists.lttng.org
· IRC channel <irc://irc.oftc.net/lttng>: #lttng on irc.oftc.net
This program is part of the LTTng-tools project.
LTTng-tools is distributed under the GNU General Public License
version 2 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html>.
See the LICENSE <https://github.com/lttng/lttng-
tools/blob/master/LICENSE> file for details.
Special thanks to Michel Dagenais and the DORSAL laboratory
<http://www.dorsal.polymtl.ca/> at École Polytechnique de Montréal
for the LTTng journey.
Also thanks to the Ericsson teams working on tracing which helped us
greatly with detailed bug reports and unusual test cases.
LTTng-tools was originally written by Mathieu Desnoyers, Julien
Desfossez, and David Goulet. More people have since contributed to
it.
LTTng-tools is currently maintained by Jérémie Galarneau
<mailto:jeremie.galarneau@efficios.com>.
lttng-save(1), lttng(1)
This page is part of the LTTng-Tools ( LTTng tools) project.
Information about the project can be found at ⟨http://lttng.org/⟩.
It is not known how to report bugs for this man page; if you know,
please send a mail to man-pages@man7.org. This page was obtained
from the project's upstream Git repository
⟨git://git.lttng.org/lttng-tools.git⟩ on 2017-07-05. If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
LTTng 2.10.0-pre 05/03/2017 LTTNG-LOAD(1)
Pages that refer to this page: lttng(1), lttng-add-context(1), lttng-calibrate(1), lttng-create(1), lttng-destroy(1), lttng-disable-channel(1), lttng-disable-event(1), lttng-enable-channel(1), lttng-enable-event(1), lttng-help(1), lttng-list(1), lttng-load(1), lttng-metadata(1), lttng-regenerate(1), lttng-save(1), lttng-set-session(1), lttng-snapshot(1), lttng-start(1), lttng-status(1), lttng-stop(1), lttng-track(1), lttng-untrack(1), lttng-version(1), lttng-view(1), lttng-sessiond(8)