src/collectd.pod

   1 =head1 NAME
   2
   3 collectd - System statistics collection daemon
   4
   5 =head1 SYNOPSIS
   6
   7 collectd I<[options]>
   8
   9 =head1 DESCRIPTION
  10
  11 collectd is a daemon that collects various system statistics periodically and
  12 stores them into RRD-files. Which data is collected depends on compile-time
  13 settings. The following features may be available:
  14
  15 =over 4
  16
  17 =item
  18
  19 Apache server stats (I<apache>)
  20
  21 =item
  22
  23 Apple hardware sensors (I<apple_sensors>, Darwin only)
  24
  25 =item
  26
  27 Battery status (I<battery>)
  28
  29 =item
  30
  31 CPU utilization (I<cpu>)
  32
  33 =item
  34
  35 Mountpoint usage (I<df>)
  36
  37 =item
  38
  39 Disk and partition usage/throughput (I<disk>)
  40
  41 =item
  42
  43 DNS traffic (I<dns>)
  44
  45 =item
  46
  47 Email usage (I<email>)
  48
  49 =item
  50
  51 Harddisk temperatures (I<hddtemp>)
  52
  53 =item
  54
  55 System load averages (I<load>)
  56
  57 =item
  58
  59 Motherboard monitor (I<mbmon>)
  60
  61 =item
  62
  63 Memory usage (I<memory>)
  64
  65 =item
  66
  67 MySQL statistics (I<mysql>)
  68
  69 =item
  70
  71 NFS utilization (I<nfs>, Linux only)
  72
  73 =item
  74
  75 Network latency (I<ping>)
  76
  77 =item
  78
  79 Number of processes (I<processes>, Linux only)
  80
  81 =item
  82
  83 lm_sensors information (I<sensors>, Linux only)
  84
  85 =item
  86
  87 Serial port traffic (I<serial>, Linux only)
  88
  89 =item
  90
  91 Swap usage (I<swap>)
  92
  93 =item
  94
  95 Tape drive usage (I<tape>, Solaris only)
  96
  97 =item
  98
  99 Network traffic (I<traffic>)
 100
 101 =item
 102
 103 Number of users logged into the system (I<users>)
 104
 105 =item
 106
 107 System ressources used by VServers (I<vserver>)
 108
 109 =item
 110
 111 Wireless network stats (I<wireless>)
 112
 113 =back
 114
 115 =head1 OPTIONS
 116
 117 =over 4
 118
 119 =item B<-C> I<E<lt>config-fileE<gt>>
 120
 121 Specify an alternative config file. This is the place to go when you wish to
 122 change B<collectd>'s behavior. The path may be relative to the current working
 123 directory.
 124
 125 =item B<-P> I<E<lt>pid-fileE<gt>>
 126
 127 Specify an alternative pid file. This overwrites any settings in the config
 128 file. This is thought for init-scripts that require the PID-file in a certain
 129 directory to work correctly. For everyday-usage use the B<PIDFile>
 130 config-option.
 131
 132 =item B<-f>
 133
 134 Don't fork to the background. I<collectd> will also B<not> close standard file
 135 descriptors, detach from the session nor write a pid file. This is mainly
 136 thought for 'supervisioning' init replacements such as I<runit>.
 137
 138 =item B<-h>
 139
 140 Output usage information and exit.
 141
 142 =back
 143
 144 =head1 MODES
 145
 146 collectd can operate in four different operating modes. The modes are described
 147 below.
 148
 149 The simplest mode is the so called B<local mode>. Data is collected locally and
 150 written in RRD files that reside in I<DataDir>. This is the default mode when
 151 collectd is linked against C<librrd>.
 152
 153 The modes B<client mode> and B<server mode> are used to send data over a
 154 network and receive it again.
 155
 156 In B<client mode> the daemon collects the data locally and sends its results
 157 to one or more network addresses. No RRD files are written locally in this
 158 case. If collectd is not linked against C<librrd> this is the default mode.
 159
 160 If started in B<server mode> the daemon will listen on one or more interfaces
 161 and write the data it receives to RRD files. No data is collected locally.
 162
 163 In the last mode, B<log mode>, data is collected locally and written in
 164 text files that reside in I<DataDir>.
 165
 166 Please refer to L<collectd.conf(5)> for the configuration options and default
 167 values.
 168
 169 =head1 SPECIAL PLUGINS
 170
 171 =head2 apache
 172
 173 This module connects to an Apache webserver and expects the output produced by
 174 B<mod_status.c>. If requires B<libcurl> to set up the HTTP connection and issue
 175 the request(s). The following is a sample config for the Apache webserver. The
 176 use of C<ExtendedStatus on> is mandatory.
 177
 178   ExtendedStatus on
 179   <IfModule mod_status.c>
 180     <Location /mod_status>
 181       SetHandler server-status
 182     </Location>
 183   </IfModule>
 184
 185 This plugin requires further configuration. Please read L<collectd.conf(5)>.
 186
 187 =head2 cpufreq
 188
 189 This module reads F</sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq> (for
 190 the first CPU installed) to get the current CPU frequency. If this file does
 191 not exist make sure B<cpufreqd> (L<http://cpufreqd.sourceforge.net/>) or a
 192 similar tool is installed and an "cpu governor" (that's kernel module) is
 193 loaded.
 194
 195 =head2 email
 196
 197 This plugin collects data indirectly by providing a UNIX socket that external
 198 programs can connect to. A simple line based protocol is used to communicate
 199 with the plugin:
 200
 201 E-Mail type (e.g. "ham", "spam", "virus", ...) and size (bytes):
 202
 203   e:<type>:<size>
 204
 205 If C<size> is less than or equal to zero, C<size> is ignored.
 206
 207 Spam score:
 208
 209   s:<value>
 210
 211 Successful spam checks (e.g. "BAYES_99", "SUBJECT_DRUG_GAP_C", ...):
 212
 213   c:<type1>[,<type2>,...]
 214
 215 Each line is limited to 256 characters (including the newline character).
 216 Longer lines will be ignored.
 217
 218 =head2 mysql
 219
 220 Requires B<mysqlclient> to be installed. It connects to the database when
 221 started and keeps the connection up as long as possible. When the connection is
 222 interrupted for whatever reason it will try to re-connect. The syslog will
 223 contain loud complaints in case anything goes wrong.
 224
 225 This plugin issues C<SHOW STATUS> and evaluates C<Bytes_{received,sent}>,
 226 C<Com_*> and C<Handler_*> which correspond to F<traffic-mysql.rrd>,
 227 F<mysql_commands-*.rrd> and F<mysql_handler-*.rrd>. Also, the values of
 228 C<Qcache_*> are put in F<mysql_qcache.rrd> and values of C<Threads_*> are put
 229 in F<mysql_threads.rrd>. Please refer to the B<MySQL reference manual>,
 230 I<5.2.4. Server Status Variables> for an explanation of these values.
 231
 232 =head2 sensors
 233
 234 The B<sensors> module uses lm_sensors to retrieve sensor-values. This means
 235 that all the needed modules have to be loaded and lm_sensors has to be
 236 configured (most likely by editing F</etc/sensors.conf>. Read
 237 L<sensors.conf(5)> for details.
 238
 239 The B<lm_sensors> homepage can be found at
 240 L<http://secure.netroedge.com/~lm78/>.
 241
 242 =head2 mbmon
 243
 244 The B<mbmon> module uses mbmon to retrieve temperature, voltage, etc.
 245
 246 collectd connects to B<localhost> (127.0.0.1), port B<411/tcp>.
 247 The B<Host> and B<Port> options can be used to change these
 248 default values. See L<collectd.conf(5)> for details. C<mbmon> has to be
 249 running to work correctly. If C<mbmon> is not running timeouts may appear
 250 which may interfere with other statistics..
 251
 252 C<mbmon> must be run with the -r option ("print TAG and Value format");
 253 Debian's /etc/init.d/mbmon script already does this, other people
 254 will need to ensure that this is the case.
 255
 256 =head2 hddtemp
 257
 258 To get values from B<hddtemp> collectd connects to B<localhost> (127.0.0.1),
 259 port B<7634/tcp>. The B<Host> and B<Port> options can be used to change these
 260 default values. See L<collectd.conf(5)> for details. C<hddtemp> has to be
 261 running to work correctly. If C<hddtemp> is not running timeouts may appear
 262 which may interfere with other statistics..
 263
 264 The B<hddtemp> homepage can be found at
 265 L<http://www.guzu.net/linux/hddtemp.php>.
 266
 267 =head2 vserver
 268
 269 B<VServer> support is only available for Linux. It cannot yet be found in a
 270 vanilla kernel, though. To make use of this plugin you need a kernel that has
 271 B<VServer> support built in, i.e. you need to apply the patches and compile
 272 your own kernel, which will then provide the /proc/virtual filesystem that is
 273 required by this plugin.
 274
 275 The B<VServer> homepage can be found at L<http://linux-vserver.org/>.
 276
 277 =head1 RRD FILES
 278
 279 The RRD files are created automatically. The size of the RRAs depend on the
 280 compile time settings of I<step> and I<width>. With the default values (I<step>
 281 = B<10>, I<width> = B<1200>) the following RRAs are created:
 282
 283   RRA:AVERAGE:0.1:1:8640
 284   RRA:AVERAGE:0.1:50:1210
 285   RRA:AVERAGE:0.1:223:1202
 286   RRA:AVERAGE:0.1:2635:1201
 287   RRA:MIN:0.1:1:8640
 288   RRA:MIN:0.1:50:1210
 289   RRA:MIN:0.1:223:1202
 290   RRA:MIN:0.1:2635:1201
 291   RRA:MAX:0.1:1:8640
 292   RRA:MAX:0.1:50:1210
 293   RRA:MAX:0.1:223:1202
 294   RRA:MAX:0.1:2635:1201
 295
 296 By default collectd uses a 10 second I<step>. Thus the RRAs contain the
 297 following timespans. If you've changed the I<step> at compile time you will
 298 have calculate resolution and timespan yourself.
 299
 300   PDP per CDP |  Resolution  | Data points | Timespan
 301   ------------+--------------+-------------+---------
 302             1 | 10.0 seconds !        8640 ! 1 day
 303            50 |  8.3 minutes |        1210 | 1 week
 304           223 | 37.2 minutes |        1202 | 1 month
 305          2635 |  7.3 hours   |        1201 | 1 year
 306
 307 The DS'es depend on the module creating the RRD files:
 308
 309 =over 4
 310
 311 =item Apache traffic (F<apache/apache_bytes.rrd>)
 312
 313   DS:count:COUNTER:HEARTBEAT:0:134217728
 314
 315 =item Apache requests (F<apache/apache_requests.rrd>)
 316
 317   DS:count:COUNTER:HEARTBEAT:0:1048576
 318
 319 =item Apache scoreboard (F<apache/apache_scoreboard-I<E<lt>nameE<gt>>.rrd>)
 320
 321   DS:count:GAUGE:HEARTBEAT:0:U
 322
 323 =item Apple temperature sensor (F<apple_sensors/temperature-I<E<lt>nameE<gt>>.rrd>)
 324
 325   DS:value:GAUGE:HEARTBEAT:U:U
 326
 327 =item Apple fanspeed sensor (F<apple_sensors/fanspeed-I<E<lt>nameE<gt>>.rrd>)
 328
 329   DS:value:GAUGE:HEARTBEAT:U:U
 330
 331 =item Battery charge (F<battery-I<E<lt>nameE<gt>>/charge.rrd>)
 332
 333   DS:charge:GAUGE:HEARTBEAT:0:U
 334
 335 =item Battery current (F<battery-I<E<lt>nameE<gt>>/current.rrd>)
 336
 337   DS:current:GAUGE:HEARTBEAT:U:U
 338
 339 =item Battery voltage (F<battery-I<E<lt>nameE<gt>>/voltage.rrd>)
 340
 341   DS:voltage:GAUGE:HEARTBEAT:U:U
 342
 343 =item CPU (F<cpu-I<E<lt>numE<gt>>.rrd>)
 344
 345   DS:user:COUNTER:HEARTBEAT:0:100
 346   DS:nice:COUNTER:HEARTBEAT:0:100
 347   DS:syst:COUNTER:HEARTBEAT:0:100
 348   DS:idle:COUNTER:HEARTBEAT:0:100
 349   DS:wait:COUNTER:HEARTBEAT:0:100
 350
 351 =item CPU frequency (F<cpufreq-I<E<lt>numE<gt>>.rrd>)
 352
 353   DS:value:GAUGE:HEARTBEAT:0:U
 354
 355 =item Mountpoints (F<df-I<E<lt>pathE<gt>>.rrd>)
 356
 357   DS:used:GAUGE:HEARTBEAT:0:U
 358   DS:free:GAUGE:HEARTBEAT:0:U
 359
 360 =item Diskstats (F<disk-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
 361
 362   DS:rcount:COUNTER:HEARTBEAT:0:U
 363   DS:rmerged:COUNTER:HEARTBEAT:0:U
 364   DS:rbytes:COUNTER:HEARTBEAT:0:U
 365   DS:rtime:COUNTER:HEARTBEAT:0:U
 366   DS:wcount:COUNTER:HEARTBEAT:0:U
 367   DS:wmerged:COUNTER:HEARTBEAT:0:U
 368   DS:wbytes:COUNTER:HEARTBEAT:0:U
 369   DS:wtime:COUNTER:HEARTBEAT:0:U
 370
 371 =item Diskstats (F<partition-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
 372
 373   DS:rcount:COUNTER:HEARTBEAT:0:U
 374   DS:rbytes:COUNTER:HEARTBEAT:0:U
 375   DS:wcount:COUNTER:HEARTBEAT:0:U
 376   DS:wbytes:COUNTER:HEARTBEAT:0:U
 377
 378 =item E-Mail count (F<email/email-I<E<lt>typeE<gt>>.rrd>)
 379
 380   DS:count:GAUGE:HEARTBEAT:0:U
 381
 382 =item E-Mail size (F<email/email_size-I<E<lt>typeE<gt>>.rrd>)
 383
 384   DS:size:GAUGE:HEARTBEAT:0:U
 385
 386 =item HDD Temperature (F<hddtemp-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
 387
 388   DS:value:GAUGE:HEARTBEAT:U:U
 389
 390 =item System load (F<load.rrd>)
 391
 392   DS:shortterm:GAUGE:HEARTBEAT:0:100
 393   DS:midterm:GAUGE:HEARTBEAT:0:100
 394   DS:longterm:GAUGE:HEARTBEAT:0:100
 395
 396 =item Memory usage (F<memory.rrd>)
 397
 398   DS:used:GAUGE:HEARTBEAT:0:9223372036854775807
 399   DS:free:GAUGE:HEARTBEAT:0:9223372036854775807
 400   DS:buffers:GAUGE:HEARTBEAT:0:9223372036854775807
 401   DS:cached:GAUGE:HEARTBEAT:0:9223372036854775807
 402
 403 =item MySQL commands and handlers (F<mysql_commands-I<E<lt>commandE<gt>>.rrd> and F<mysql_handler-I<E<lt>handlerE<gt>>.rrd>)
 404
 405   DS:value:COUNTER:HEARTBEAT:0:U
 406
 407 =item MySQL query cache (F<mysql_qcache.rrd>)
 408
 409   DS:hits:COUNTER:HEARTBEAT:0:U
 410   DS:inserts:COUNTER:HEARTBEAT:0:U
 411   DS:not_cached:COUNTER:HEARTBEAT:0:U
 412   DS:lowmem_prunes:COUNTER:HEARTBEAT:0:U
 413   DS:queries_in_cache:GAUGE:HEARTBEAT:0:U
 414
 415 =item MySQL threads (F<mysql_threads.rrd>)
 416
 417   DS:running:GAUGE:HEARTBEAT:0:U
 418   DS:connected:GAUGE:HEARTBEAT:0:U
 419   DS:cached:GAUGE:HEARTBEAT:0:U
 420   DS:created:COUNTER:HEARTBEAT:0:U
 421
 422 =item NFSv2 Procedures (F<nfs2_procedures-I<(client|server)>.rrd>)
 423
 424   DS:null:COUNTER:HEARTBEAT:0:U
 425   DS:getattr:COUNTER:HEARTBEAT:0:U
 426   DS:setattr:COUNTER:HEARTBEAT:0:U
 427   DS:root:COUNTER:HEARTBEAT:0:U
 428   DS:lookup:COUNTER:HEARTBEAT:0:U
 429   DS:readlink:COUNTER:HEARTBEAT:0:U
 430   DS:read:COUNTER:HEARTBEAT:0:U
 431   DS:wrcache:COUNTER:HEARTBEAT:0:U
 432   DS:write:COUNTER:HEARTBEAT:0:U
 433   DS:create:COUNTER:HEARTBEAT:0:U
 434   DS:remove:COUNTER:HEARTBEAT:0:U
 435   DS:rename:COUNTER:HEARTBEAT:0:U
 436   DS:link:COUNTER:HEARTBEAT:0:U
 437   DS:symlink:COUNTER:HEARTBEAT:0:U
 438   DS:mkdir:COUNTER:HEARTBEAT:0:U
 439   DS:rmdir:COUNTER:HEARTBEAT:0:U
 440   DS:readdir:COUNTER:HEARTBEAT:0:U
 441   DS:fsstat:COUNTER:HEARTBEAT:0:U
 442
 443 =item NFSv3 Procedures (F<nfs3_procedures-I<(client|server)>.rrd>)
 444
 445   DS:null:COUNTER:HEARTBEAT:0:U
 446   DS:getattr:COUNTER:HEARTBEAT:0:U
 447   DS:setattr:COUNTER:HEARTBEAT:0:U
 448   DS:lookup:COUNTER:HEARTBEAT:0:U
 449   DS:access:COUNTER:HEARTBEAT:0:U
 450   DS:readlink:COUNTER:HEARTBEAT:0:U
 451   DS:read:COUNTER:HEARTBEAT:0:U
 452   DS:write:COUNTER:HEARTBEAT:0:U
 453   DS:create:COUNTER:HEARTBEAT:0:U
 454   DS:mkdir:COUNTER:HEARTBEAT:0:U
 455   DS:symlink:COUNTER:HEARTBEAT:0:U
 456   DS:mknod:COUNTER:HEARTBEAT:0:U
 457   DS:remove:COUNTER:HEARTBEAT:0:U
 458   DS:rmdir:COUNTER:HEARTBEAT:0:U
 459   DS:rename:COUNTER:HEARTBEAT:0:U
 460   DS:link:COUNTER:HEARTBEAT:0:U
 461   DS:readdir:COUNTER:HEARTBEAT:0:U
 462   DS:readdirplus:COUNTER:HEARTBEAT:0:U
 463   DS:fsstat:COUNTER:HEARTBEAT:0:U
 464   DS:fsinfo:COUNTER:HEARTBEAT:0:U
 465   DS:pathconf:COUNTER:HEARTBEAT:0:U
 466   DS:commit:COUNTER:HEARTBEAT:0:U
 467
 468 =item Network latency / Ping (F<ping-I<E<lt>hostnameE<gt>>.rrd>)
 469
 470   DS:ping:GAUGE:HEARTBEAT:0:65535
 471
 472 =item Processes (F<processes.rrd>)
 473
 474   DS:running:GAUGE:HEARTBEAT:0:65535
 475   DS:sleeping:GAUGE:HEARTBEAT:0:65535
 476   DS:zombies:GAUGE:HEARTBEAT:0:65535
 477   DS:stopped:GAUGE:HEARTBEAT:0:65535
 478   DS:paging:GAUGE:HEARTBEAT:0:65535
 479   DS:blocked:GAUGE:HEARTBEAT:0:65535
 480
 481 =item lm_sensors fanspeed sensor (F<sensors-I<E<lt>instE<gt>>.rrd> or F<lm_sensors-I<E<lt>chipE<gt>>/fanspeed-I<E<lt>instE<gt>>.rrd>)
 482
 483   DS:value:GAUGE:HEARTBEAT:U:U
 484
 485 =item lm_sensors temperature sensor (F<sensors-I<E<lt>instE<gt>>.rrd> or F<lm_sensors-I<E<lt>chipE<gt>>/temperature-I<E<lt>instE<gt>>.rrd>)
 486
 487   DS:value:GAUGE:HEARTBEAT:U:U
 488
 489 =item lm_sensors voltage sensor (F<sensors-I<E<lt>instE<gt>>.rrd> or F<lm_sensors-I<E<lt>chipE<gt>>/voltage-I<E<lt>instE<gt>>.rrd>)
 490
 491   DS:voltage:GAUGE:HEARTBEAT:U:U
 492
 493 =item Serial port traffic (F<serial-I<E<lt>numE<gt>>.rrd>)
 494
 495   DS:incoming:COUNTER:HEARTBEAT:0:U
 496   DS:outgoing:COUNTER:HEARTBEAT:0:U
 497
 498 =item Spam score (F<email/spam_score.rrd>)
 499
 500   DS:score:GAUGE:HEARTBEAT:0:U
 501
 502 =item Spam checks (F<email/spam_check-I<E<lt>typeE<gt>>.rrd>)
 503
 504   DS:hits:GAUGE:HEARTBEAT:0:U
 505
 506 =item Swap usage (F<swap.rrd>)
 507
 508   DS:used:GAUGE:HEARTBEAT:0:1099511627776
 509   DS:free:GAUGE:HEARTBEAT:0:1099511627776
 510   DS:cached:GAUGE:HEARTBEAT:0:1099511627776
 511   DS:resv:GAUGE:HEARTBEAT:0:1099511627776
 512
 513 =item Tape drive usage (F<tape-I<E<lt>nameE<gt>>.rrd>)
 514
 515   DS:rcount:COUNTER:HEARTBEAT:0:
 516   DS:rmerged:COUNTER:HEARTBEAT:0:U
 517   DS:rbytes:COUNTER:HEARTBEAT:0:U
 518   DS:rtime:COUNTER:HEARTBEAT:0:U
 519   DS:wcount:COUNTER:HEARTBEAT:0:U
 520   DS:wmerged:COUNTER:HEARTBEAT:0:U
 521   DS:wbytes:COUNTER:HEARTBEAT:0:U
 522   DS:wtime:COUNTER:HEARTBEAT:0:U
 523
 524 =item Network traffic (F<traffic-I<E<lt>interfaceE<gt>>.rrd>)
 525
 526   DS:incoming:COUNTER:HEARTBEAT:0:U
 527   DS:outgoing:COUNTER:HEARTBEAT:0:U
 528
 529 =item Interface packets (F<if_packets-I<E<lt>interfaceE<gt>>.rrd>)
 530
 531   DS:rx:COUNTER:HEARTBEAT:0:U
 532   DS:tx:COUNTER:HEARTBEAT:0:U
 533
 534 =item Interface errors (F<if_errors-I<E<lt>interfaceE<gt>>.rrd>)
 535
 536   DS:rx:COUNTER:HEARTBEAT:0:U
 537   DS:tx:COUNTER:HEARTBEAT:0:U
 538
 539 =item Users (F<users.rrd>)
 540
 541   DS:users:GAUGE:HEARTBEAT:0:65535
 542
 543 =item VServer load (F<vserver-I<E<lt>xidE<gt>>/load.rrd>)
 544
 545   DS:shortterm:GAUGE:HEARTBEAT:0:100
 546   DS:midterm:GAUGE:HEARTBEAT:0:100
 547   DS:longterm:GAUGE:HEARTBEAT:0:100
 548
 549 =item VServer threads (F<vserver-I<E<lt>xidE<gt>>/threads.rrd>)
 550
 551   DS:total:GAUGE:HEARTBEAT:0:65535
 552   DS:running:GAUGE:HEARTBEAT:0:65535
 553   DS:uninterruptible:GAUGE:HEARTBEAT:0:65535
 554   DS:onhold:GAUGE:HEARTBEAT:0:65535
 555
 556 =item VServer network traffic (F<vserver-I<E<lt>xidE<gt>>/traffic-I<E<lt>nameE<gt>>.rrd>)
 557
 558   DS:incoming:COUNTER:HEARTBEAT:0:9223372036854775807
 559   DS:outgoing:COUNTER:HEARTBEAT:0:9223372036854775807
 560   DS:failed:COUNTER:HEARTBEAT:0:9223372036854775807
 561
 562 =item VServer processes (F<vserver-I<E<lt>xidE<gt>>/vs_processes.rrd>)
 563
 564   DS:total:GAUGE:HEARTBEAT:0:65535
 565
 566 =item VServer memory usage (F<vserver-I<E<lt>xidE<gt>>/vs_memory.rrd>)
 567
 568   DS:vm:GAUGE:HEARTBEAT:0:9223372036854775807
 569   DS:vml:GAUGE:HEARTBEAT:0:9223372036854775807
 570   DS:rss:GAUGE:HEARTBEAT:0:9223372036854775807
 571   DS:anon:GAUGE:HEARTBEAT:0:9223372036854775807
 572
 573 =item Wireless link quality (F<wireless-I<E<lt>interfaceE<gt>>.rrd>)
 574
 575   DS:quality:GAUGE:HEARTBEAT:0:U
 576   DS:power:GAUGE:HEARTBEAT:U:0
 577   DS:noise:GAUGE:HEARTBEAT:U:0
 578
 579 =back
 580
 581 =head1 SEE ALSO
 582
 583 L<collectd.conf(5)>, L<rrdtool(1)>, L<sensors(1)>, L<hddtemp(8)>,
 584 L<mbmon(1)>,
 585 L<kstat(3KSTAT)>
 586
 587 =head1 AUTHOR
 588
 589 Florian Forster E<lt>octo@verplant.orgE<gt>
 590
 591 =cut