1 .TH llog_reader 8 "2009 Apr 02" Lustre "System management commands"
3 llog_reader \- lustre on-disk log parsing utility
5 .B "llog_reader filename"
9 parses the binary format of Lustre's on-disk configuration logs.
10 It can only read the logs. Use
14 To examine a log file on a stopped Lustre server, first mount its
15 backing file system as ldiskfs, then use
17 to dump the log file's contents, e.g.
20 mount -t ldiskfs /dev/sda /mnt/mgs
21 llog_reader /mnt/mgs/CONFIGS/tfs-client
24 To examine the same log file on a running Lustre server, use the
25 ldiskfs-enabled debugfs utility (called
27 on some distros) to extract the file, e.g.
30 debugfs -c -R 'dump CONFIGS/tfs-client /tmp/tfs-client' /dev/sda
31 llog_reader /tmp/tfs-client
34 Although they are stored in the CONFIGS directory, \fImountdata\fR
35 files do not use the config log format and will confuse \fBllog_reader\fR.
37 Lustre Operations Manual, Section 21.1, \fITroubleshooting Lustre\fR.