`lttng-enable-rotation` ( 1 )

установите расписание ротации сеанса трассировки (Set a tracing session's rotation schedule)

Имя (Name)

lttng-enable-rotation - Set a tracing session's rotation schedule

Синопсис (Synopsis)

lttng [GENERAL OPTIONS] enable-rotation (--timer=PERIOD | --size=SIZE) [--session=SESSION]

Описание (Description)

The lttng enable-rotation command sets a rotation schedule for the current tracing session, or for the tracing session named SESSION if provided. See lttng-rotate(1) for more information about the concepts of a tracing session rotation and a trace chunk.

With the --timer option, the rotation schedule is set so that an automatic rotation occurs at least every PERIOD (microseconds without a unit suffix).

With the --size option, the rotation schedule is set so that an automatic rotation occurs every time the total size of the flushed part of the current trace chunk is at least SIZE (bytes without a unit suffix).

With both the --timer and --size options, LTTng checks the schedule condition periodically using the monitor timers of the tracing session's channels. This means that, with the --timer option, the automatic rotation can occur when the elapsed time since the last automatic rotation is greater than PERIOD, and with the --size option, the automatic rotation can occur when the size of the flushed part of the current trace chunk is greater than SIZE. See the --monitor-timer option in lttng-enable-channel(1) for more information about the monitor timer.

The naming convention of a trace chunk archive which an automatic rotation creates is the same as with the immediate rotation command, lttng-rotate(1).

You can unset a rotation schedule with the lttng-disable-rotation(1) command.

See LIMITATIONS for important limitations regarding this command.

Параметры (Options)

General options are described in lttng(1).

   Rotation schedule condition
       One of:

       --size=SIZE
           Set a rotation schedule so that an automatic rotation occurs
           every time the total size of the flushed part of the current
           trace chunk is at least SIZE bytes. The k (kiB), M (MiB), and
           G (GiB) suffixes are supported.

       --timer=PERIOD
           Set a rotation schedule so that an automatic rotation occurs
           at least every PERIOD microseconds. The ms (milliseconds), s
           (seconds), m (minutes), and h (hours) suffixes are supported.

   Target
       -s SESSION, --session=SESSION
           Set a rotation schedule for the tracing session named SESSION
           instead of the current tracing session.

   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.

Ограничения (Limitations)

The lttng enable-rotation command only works when:

• The tracing session is created in normal mode or in network streaming mode (see lttng-create(1)).

• No channel was created with a configured trace file count or size limit (see the --tracefile-size and --tracefile-count options in lttng-enable-channel(1)).

For a given tracing session, LTTng only performs an automatic rotation when no other rotation is currently happening.

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-enable-rotation ( 1 )