| 1 | lttng-metadata(1) |
| 2 | ================= |
| 3 | |
| 4 | |
| 5 | NAME |
| 6 | ---- |
| 7 | lttng-metadata - Manage an LTTng tracing session's metadata generation |
| 8 | |
| 9 | |
| 10 | SYNOPSIS |
| 11 | -------- |
| 12 | [verse] |
| 13 | *lttng* ['linkgenoptions:(GENERAL OPTIONS)'] *metadata regenerate* [option:--session='SESSION'] |
| 14 | |
| 15 | |
| 16 | DESCRIPTION |
| 17 | ----------- |
| 18 | The `lttng metadata` command manages a tracing session's metadata |
| 19 | generation options. |
| 20 | |
| 21 | As of this version, only the `regenerate` command's action is available. |
| 22 | Regenerating a tracing session's metadata can be used to |
| 23 | resample the offset between the system's monotonic clock and |
| 24 | the wall-clock time. |
| 25 | |
| 26 | This command is meant to be used to resample the wall-clock time |
| 27 | following a major |
| 28 | link:https://en.wikipedia.org/wiki/Network_Time_Protocol[NTP] |
| 29 | correction. As such, a system booting with an incorrect wall time can be |
| 30 | traced before its wall time is NTP-corrected. Regenerating the tracing |
| 31 | session's metadata ensures that trace viewers can accurately determine |
| 32 | the events time relative to Unix Epoch. |
| 33 | |
| 34 | |
| 35 | include::common-cmd-options-head.txt[] |
| 36 | |
| 37 | |
| 38 | option:-s, option:--session='SESSION':: |
| 39 | Manage the metadata generation of the tracing session named 'SESSION' |
| 40 | instead of the current tracing session. |
| 41 | |
| 42 | |
| 43 | include::common-cmd-help-options.txt[] |
| 44 | |
| 45 | |
| 46 | LIMITATIONS |
| 47 | ----------- |
| 48 | The `lttng metadata regenerate` command can only be used on kernel and |
| 49 | user space tracing sessions (using per-user buffering), in non-live |
| 50 | mode. |
| 51 | |
| 52 | See linklttng:lttng-enable-channel(1) for more information about |
| 53 | buffering schemes and linklttng:lttng-create(1) for more information |
| 54 | about the different tracing session modes. |
| 55 | |
| 56 | |
| 57 | include::common-cmd-footer.txt[] |
| 58 | |
| 59 | |
| 60 | SEE ALSO |
| 61 | -------- |
| 62 | linklttng:lttng(1) |