doc/man/lttng-relayd.8

   1 .TH "LTTNG-RELAYD" "8" "July 15, 2012" "" ""
   2
   3 .SH "NAME"
   4 lttng-relayd \(em LTTng remote trace collection daemon
   5
   6 .SH "SYNOPSIS"
   7
   8 .PP
   9 .nf
  10 lttng-relayd [OPTIONS]
  11 .fi
  12 .SH "DESCRIPTION"
  13
  14 .PP
  15 The LTTng project aims at providing highly efficient tracing tools for Linux.
  16 It's tracers help tracking down performance issues and debugging problems
  17 involving multiple concurrent processes and threads. Tracing across multiple
  18 systems is also possible.
  19
  20 The relay daemon listens on the network and receives traces streamed by a
  21 remote consumer. This daemon does not require any particular permissions as
  22 long as it can write in the output folder and listen on the ports.
  23
  24 Once a trace has been streamed completely, the trace can be processed by any
  25 tool that can process a local LTTng CTF trace.
  26
  27 By default, the relayd outputs the traces in :
  28 ~/lttng-traces/hostname/session-name/domain-name
  29
  30 The prefix (~/lttng-traces) can be configured on the relayd side (see below for
  31 the option), the other folders can be configured when creating the trace on the
  32 sessiond side.
  33 .SH "OPTIONS"
  34
  35 .PP
  36 This program follow the usual GNU command line syntax with long options starting with
  37 two dashes. Below is a summary of the available options.
  38 .PP
  39
  40 .TP
  41 .BR "-h, --help"
  42 Show summary of possible options and commands
  43 .TP
  44 .BR "-v, --verbose"
  45 Increase verbosity
  46
  47 There is three debugging level which will print on stderr. Maximum verbosity is
  48 \fB-vvv\fP.
  49 .TP
  50 .BR "-d, --daemonize"
  51 Start as a daemon
  52 .TP
  53 .BR "-b, --background"
  54 Start as a daemon, keeping console open
  55 .TP
  56 .BR "-C, --control-port"
  57 Control port URL (tcp://0.0.0.0:5342 is the default)
  58 .TP
  59 .BR "-D, --data-port"
  60 Data port URL (tcp://0.0.0.0:5343 is the default)
  61 .TP
  62 .BR "-L, --live-port URL"
  63 Live view port URL (tcp://0.0.0.0:5344 is the default).
  64 .TP
  65 .BR "-o, --output"
  66 Output base directory. Must use an absolute path (~/lttng-traces is the default)
  67 .TP
  68 .BR "-V, --version"
  69 Show version number
  70 .SH "ENVIRONMENT VARIABLES"
  71
  72 .PP
  73 .IP "LTTNG_NETWORK_SOCKET_TIMEOUT"
  74 Control timeout of socket connection, receive and send. Takes an integer
  75 parameter: the timeout value, in milliseconds. A value of 0 or -1 uses
  76 the timeout of the operating system (this is the default).
  77 .IP "LTTNG_RELAYD_HEALTH"
  78 File path used for relay daemon health check communication.
  79 .PP
  80
  81 .SH "SEE ALSO"
  82
  83 .PP
  84 babeltrace(1), lttng-sessiond(8), lttng-ust(3), lttng(1)
  85 .PP
  86
  87 .SH "LIMITATIONS"
  88
  89 .PP
  90 For now only TCP is supported on both control and data port.
  91 Control will always remain TCP-only since it is low-volume and needs absolutely
  92 to be reliable, but eventually the data connection could support UDP.
  93
  94 For unprivileged user running lttng-relayd, the maximum number of file
  95 descriptors per process is usually 1024. This limits the number of connections
  96 and tracefiles opened. This limit can be configured see ulimit(3).
  97 .PP
  98
  99 .SH "BUGS"
 100
 101 .PP
 102 No show stopper bugs are known yet in this version.
 103
 104 If you encounter any issues or usability problem, please report it on our
 105 mailing list <lttng-dev@lists.lttng.org> to help improve this project.
 106 .SH "CREDITS"
 107
 108 .PP
 109 lttng-relayd is distributed under the GNU General Public License version 2. See the
 110 file COPYING for details.
 111 .PP
 112 A Web site is available at http://lttng.org for more information on the LTTng
 113 project.
 114 .PP
 115 You can also find our git tree at http://git.lttng.org.
 116 .PP
 117 Mailing lists for support and development: <lttng-dev@lists.lttng.org>.
 118 .PP
 119 You can find us on IRC server irc.oftc.net (OFTC) in #lttng.
 120 .PP
 121 .SH "AUTHORS"
 122
 123 .PP
 124 lttng-relay was originally written by Julien Desfossez and
 125 David Goulet. More people have since contributed to it. It is currently
 126 maintained by Julien Desfossez <jdesfossez@efficios.com>.
 127 .PP