NAME¶trace-cmd-restore - restore a failed trace record
SYNOPSIS¶trace-cmd restore [OPTIONS] [command] cpu-file [cpu-file ...]
DESCRIPTION¶The trace-cmd(1) restore command will restore a crashed trace-cmd-record(1) file. If for some reason a trace-cmd record fails, it will leave a the per-cpu data files and not create the final trace.dat file. The trace-cmd restore will append the files to create a working trace.dat file that can be read with trace-cmd-report(1).
When trace-cmd record runs, it spawns off a process per CPU and writes to a per cpu file usually called trace.dat.cpuX, where X represents the CPU number that it is tracing. If the -o option was used in the trace-cmd record, then the CPU data files will have that name instead of the trace.dat name. If a unexpected crash occurs before the tracing is finished, then the per CPU files will still exist but there will not be any trace.dat file to read from. trace-cmd restore will allow you to create a trace.dat file with the existing data files.
If *-o* is not specified, then the file created will be called 'trace-partial.dat'. This is because the file is not a full version of something that trace-cmd-report(1) could use.
EXAMPLES¶If a crash happened on another box, you could run:
$ trace-cmd restore -c -o box-partial.dat
Then on the server that has the cpu files:
$ trace-cmd restore -i box-partial.dat trace.dat.cpu0 trace.dat.cpu1
This would create a trace.dat file for the embedded box.
SEE ALSO¶trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), trace-cmd-stop(1), trace-cmd-extract(1), trace-cmd-reset(1), trace-cmd-split(1), trace-cmd-list(1), trace-cmd-listen(1)
AUTHOR¶Written by Steven Rostedt, <firstname.lastname@example.org>
COPYING¶Copyright (C) 2010 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).