Fix: add missing refcount of loaded modules
[lttng-tools.git] / doc / man / lttng-load.1.txt
1 lttng-load(1)
2 =============
3
4
5 NAME
6 ----
7 lttng-load - Load LTTng tracing session configurations
8
9
10 SYNOPSIS
11 --------
12 [verse]
13 *lttng* ['linkgenoptions:(GENERAL OPTIONS)'] *load* [option:--force] [option:--input-path='PATH']
14 [option:--override-url='URL'] [option:--override-name='NAME'] ['SESSION']
15
16
17 DESCRIPTION
18 -----------
19 The `lttng load` command loads the configurations of one or more
20 tracing sessions from files.
21
22 The `lttng load` command is used in conjunction with the
23 man:lttng-save(1) command to save and restore the complete
24 configurations of tracing sessions. This includes the enabled channels
25 and event rules, the context added to channels, the tracing activity,
26 and more.
27
28 Once one or more tracing session configurations are loaded, they appear
29 exactly as they were saved from the user's point of view.
30
31 The following directories are searched, non-recursively, in this order
32 for configuration files:
33
34 . `$LTTNG_HOME/.lttng/sessions` (`$LTTNG_HOME` defaults to `$HOME`)
35 . +{system_sessions_dir}+
36
37 The input path can be overridden with the option:--input-path option.
38 When this option is specified, the default directories are :not:
39 searched for configuration files. When it's not specified, _both_
40 default directories are searched for configuration files.
41
42 If the input path is a *directory*, then:
43
44 * If 'SESSION' is specified, the tracing session configuration named
45 'SESSION' is searched for in all the files of this directory and
46 loaded if found.
47 * If 'SESSION' is not specified, the option:--all option is implicit:
48 all the tracing session configurations found in all the files in this
49 directory are loaded.
50
51 If the input path is a *file*, then:
52
53 * If 'SESSION' is specified, the tracing session configuration named
54 'SESSION' is searched for in this file and loaded if found.
55 * If 'SESSION' is not specified, the option:--all option is implicit:
56 all the tracing session configurations found in this file are loaded.
57
58 Aspects of the loaded configurations can be overridden at load time.
59
60 option:--override-url::
61 Provides the equivalent of the option:--set-url option
62 of the (1)lttng-create command. The validity of the url override is
63 dependant on the type of session(s) to be loaded. Refer to (1)lttng-create for
64 the accepted URL format.
65
66 option:--override-name::
67 Set the session name to NAME. This option is invalid in combination with
68 the --all option.
69
70 By default, existing tracing sessions are not overwritten when loading:
71 the command fails. The option:--force option can be used to allow this.
72
73
74 include::common-cmd-options-head.txt[]
75
76
77 option:-a, option:--all::
78 Load all tracing session configurations (default).
79
80 option:-f, option:--force::
81 Overwrite existing tracing sessions when loading.
82
83 option:-i, option:--input-path='PATH'::
84 Load tracing session configurations from 'PATH', either a directory
85 or a file, instead of loading them from the default search
86 directories.
87
88 option:-U, option:--override-url='URL'::
89 Load tracing session configurations and apply an url override
90 while loading. Applies to all sessions loaded.
91
92 include::common-cmd-help-options.txt[]
93
94
95 include::common-cmd-footer.txt[]
96
97
98 SEE ALSO
99 --------
100 man:lttng-save(1),
101 man:lttng(1)
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