`lttng-save` ( 1 )

сохранение конфигураций сеанса трассировки LTTng (Save LTTng tracing session configurations)

Имя (Name)

lttng-save - Save LTTng tracing session configurations

Синопсис (Synopsis)

lttng [GENERAL OPTIONS] save [--force] [--output-path=PATH] [SESSION]

Описание (Description)

The lttng save command saves the configurations of one or more tracing sessions to files.

The lttng save command is used in conjunction with the lttng-load(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. lttng save does not save tracing data, only the tracing session parameters.

If SESSION is omitted, all the existing tracing session configurations are saved (equivalent to using the --all option). Otherwise, SESSION is the name of an existing tracing session. lttng list outputs all the existing tracing sessions (see lttng-list(1)).

The default output directory path is $LTTNG_HOME/.lttng/sessions ($LTTNG_HOME defaults to $HOME). Each tracing session configuration file is named SESSION.lttng, where SESSION is the original tracing session name. The default output directory path can be overridden with the --output-path option.

By default, existing tracing session configuration files are not overwritten when saving; the command fails. The --force option can be used to allow this.

Параметры (Options)

General options are described in lttng(1).

       -a, --all
           Save all tracing session configurations (default).

       -f, --force
           Overwrite existing tracing session configuration files when
           saving.

       -o PATH, --output-path=PATH
           Set output directory path to PATH.

   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.

Переменные окружения (Environment variables)

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.

Файлы (Files)

$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.

Статус выхода (Exit)

0 Success

1 Command error

2 Undefined command

3 Fatal error

4 Command warning (something went wrong during the command)

Ошибки (баги) (Bugs)

If you encounter any issue or usability problem, please report it on the LTTng bug tracker <https://bugs.lttng.org/projects/lttng- tools>.

Ресурсы (Resources)

• LTTng project website <https://lttng.org>

• LTTng documentation <https://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

Исходный текст на man7.org

lttng-save ( 1 )