X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=doc%2Fman%2Flttng-enable-rotation.1.txt;h=2071848e184c8e0acd894bc15fe1f903bfc91c8a;hb=80950c2ceefe543d324833a7fc045ec94494ded6;hp=cd8de7309131468db42c44e0795de93cb14203b7;hpb=484b2a0cbefcf0c7072622a5a411ea5ed849da28;p=lttng-tools.git diff --git a/doc/man/lttng-enable-rotation.1.txt b/doc/man/lttng-enable-rotation.1.txt index cd8de7309..2071848e1 100644 --- a/doc/man/lttng-enable-rotation.1.txt +++ b/doc/man/lttng-enable-rotation.1.txt @@ -1,11 +1,11 @@ lttng-enable-rotation(1) ======================== -:revdate: 21 April 2021 +:revdate: 17 May 2021 NAME ---- -lttng-enable-rotation - Set a tracing session rotation schedule +lttng-enable-rotation - Set an LTTng tracing session rotation schedule SYNOPSIS @@ -24,12 +24,11 @@ With the option:--session='SESSION' option:: The tracing session named 'SESSION'. Without the option:--session option:: - The current tracing session (see man:lttng-create(1) and - man:lttng-set-session(1) to learn more about the current tracing - session). + The current tracing session (see man:lttng-concepts(7) to learn more + about the current tracing session). -See man:lttng-rotate(1) for more information about the concepts of a -tracing session _rotation_ and a _trace chunk_. +See man:lttng-concepts(7) to learn more about the tracing session +rotation and trace chunk concepts. With the option:--timer='PERIODUS' option, the `enable-rotation` command sets a rotation schedule so that LTTng performs an automatic rotation at @@ -43,7 +42,7 @@ least 'SIZE'. For both the option:--timer and option:--size options, LTTng checks the schedule condition periodically using the monitor timers of the channels of the selected tracing session (see the nloption:--monitor-timer option -of man:lttng-enable-channel(1)). This means that: +of the man:lttng-enable-channel(1) command). This means that: * With the option:--timer='PERIODUS' option, LTTng can perform an automatic rotation when the elapsed time since the last automatic @@ -58,30 +57,32 @@ relies on the precision of the platform implementation of POSIX timers. You may combine the option:--timer and option:--size options. -The naming convention of a trace chunk archive which an automatic -rotation operation creates is the same as with the immediate rotation -command, man:lttng-rotate(1). +See the man:lttng-concepts(7) to learn how LTTng names a trace chunk +archive directory. + +See the <> section below for usage examples. Unset a tracing session rotation schedule with the man:lttng-disable-rotation(1) command. [IMPORTANT] ==== -The `enable-rotation` command only works when: +You may only use the `enable-rotation` command when: * The selected tracing session was created in normal mode or in network streaming mode (see man:lttng-create(1)). * No channel was created with a configured trace file count or size limit (see the nloption:--tracefile-size and - nloption:--tracefile-count options of man:lttng-enable-channel(1)). + nloption:--tracefile-count options of the man:lttng-enable-channel(1) + command). For a given tracing session, LTTng only performs an automatic rotation -when no other rotation is currently happening. +when it's not currently performing a rotation. ==== -include::common-cmd-options-head.txt[] +include::common-lttng-cmd-options-head.txt[] Rotation schedule condition @@ -95,8 +96,8 @@ The `k`{nbsp}(KiB), `M`{nbsp}(MiB), and `G`{nbsp}(GiB) suffixes are supported. option:--timer='PERIODUS':: - Set a rotation schedule so that LTTng performs an automatic rotation at - least every 'PERIODUS' microseconds. + Set a rotation schedule so that LTTng performs an automatic rotation + approximately every 'PERIODUS' microseconds. + The `ms`{nbsp}(milliseconds), `s`{nbsp}(seconds), `m`{nbsp}(minutes), and `h`{nbsp}(hours) suffixes are supported. @@ -109,10 +110,37 @@ option:-s 'SESSION', option:--session='SESSION':: instead of the current tracing session. -include::common-cmd-help-options.txt[] +include::common-lttng-cmd-help-options.txt[] + + +include::common-lttng-cmd-after-options.txt[] + + +[[examples]] +EXAMPLES +-------- +.Set the size-based rotation schedule of the current tracing session. +==== +See the option:--size option. + +[role="term"] +---- +$ lttng disable-rotation --size=256M +---- +==== + +.Set the periodic rotation schedule of a specific tracing session. +==== +See the option:--timer and option:--session options. + +[role="term"] +---- +$ lttng disable-rotation --session=my-session --timer=5m +---- +==== -include::common-cmd-footer.txt[] +include::common-footer.txt[] SEE ALSO @@ -120,4 +148,5 @@ SEE ALSO man:lttng(1), man:lttng-create(1), man:lttng-disable-rotation(1), -man:lttng-rotate(1) +man:lttng-rotate(1), +man:lttng-concepts(7)