Monitoring Options
from Pogo,
Walt Kelly
Pig was hired to watch the logs.
Last update:
10-May-2009 16:19
UTC
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Table of Contents
Introduction
The ntpd includes a comprehensive monitoring facility which collects
statistical data of various types and writes the data to files associated with
each type at defined events or intervals. The files associated with a particular
type are collectively called the generation file set for that type. The files
in the file set are the members of that set.
File sets have names specific to the type and generation epoch. The names
are constructed from three concatenated elements prefix, filename and suffix:
- prefix
- The directory path specified in the statsdir command.
- name
- The name specified by the file option of the filegen command.
- suffix
- A string of elements bdginning with . (dot) followed by a number of elements
depending on the file set type.
Statistics files can be managed using scripts, examples of which are in the ./scripts directory.
Using these or similar scripts and Unix cron jobs, the files can be
automatically summarized and archived for retrospective analysis.
Monitoring Commands
- filegen name file filename [type type]
[link | nolink] [enable | disable]
-
- name
- Specifies the file set type from the list in the next section.
- file filename
- Specfies the file set name.
- type typename
- Specifies the file set interval. The following intervals are supported
with default day:
-
- none
- The file set is actually a single plain file.
- pid
- One file set member is created for every incarnation of ntpd.
The file name suffix is the string .n, where n is the
process ID of the ntpd server process.
- day
- One file set member is created per day. A day is defined as the period
between 00:00 and 23:59 UTC. The file name suffix is the string .yyyymmdd,
where yyyy is the year, mm the month of the year and dd the
day of the month. Thus, member created on 10 December 1992 would have suffix .19921210.
- week
- One file set member is created per week. The week is defined as the
day of year modulo 7. The file name suffix is the string .yyyyWww,
where yyyy is the year, W stands for itself and ww the
week number starting from 0. For example, The member created on 10 January
1992 would have suffix .1992W1.
- month
- One file set member is created per month. The file name suffix is the
string .yyyymm, where yyyy is the year and mm the
month of the year starting from 1. For example, The member created on 10
January 1992 would have suffix .199201.
- year
- One file set member is generated per year. The file name suffix is the
string .yyyy, where yyyy is the year. For example, The
member created on 1 January 1992 would have suffix .1992.
- age
- One file set member is generated every 24 hours of ntpd operation.
The filename suffix is the string .adddddddd, where a stands
for itself and dddddddd is the ntpd running time in seconds
at the start of the corresponding 24-hour period.
- link | nolink
- It is convenient to be able to access the current file set members by
file name, but without the suffix. This feature is enabled by link and
disabled by nolink. If enabled, which is the default, a hard link
from the current file set member to a file without suffix is created. When
there is already a file with this name and the number of links to this file
is one, it is renamed by appending a dot, the letter C, and the
pid of the ntpd server process. When the number of links is greater
than one, the file is unlinked. This allows the current file to be accessed
by a constant name.
- enable | disable
- Enable or disable the recording function, with default enable.
These options are intended for remote configutation commands.
- statsdir directory_path
- Specify the directory path prefix for statistics file names.
File Set Types
- clockstats
- Record reference clock statistics. Each update received from a reference
clock driver appends one line to the clockstats file set:
- 49213 525.624 127.127.4.1 93 226 00:08:29.606 D
-
| Item |
Units |
Description |
| 49213 |
MJD |
date |
| 525.624 |
s |
time past midnight |
| 127.127.4.1 |
IP |
reference clock address |
| message |
text |
log message |
- The message field includes the last timecode received in
decoded ASCII format, where meaningful. In some cases a good deal of additional
information is displayed. See information specific to each reference clock
for further details.
- cryptostats
- Record significant events in the Autokey protocol. This option requires
the OpenSSL cryptographic software library. Each event appends one line to
the cryptostats file set:
- 49213 525.624 128.4.1.1 message
-
| Item |
Units |
Description |
| 49213 |
MJD |
date |
| 525.624 |
s |
time past midnight |
| 128.4.1.1 |
IP |
source address (0.0.0.0 for system) |
| message |
text |
log message |
- The message field includes the message type and certain
ancillary information. See the Authentication Options page
for further information.
- loopstats
- Record clock discipline loop statistics. Each system clock update appends
one line to the loopstats file set:
- 50935 75440.031 0.000006019 13.778 0.000351733 0.013380 6
-
| Item |
Units |
Description |
| 50935 |
MJD |
date |
| 75440.031 |
s |
time past midnight |
| 0.000006019 |
s |
clock offset |
| 13.778 |
PPM |
frequency offset |
| 0.000351733 |
s |
RMS jitter |
| 0.013380 |
PPM |
RMS frequency jitter (aka wander) |
| 6 |
log2 s |
clock discipline loop time constant |
- peerstats
- Record peer statistics. Each NTP packet or reference clock update received
appends one line to the peerstats file set:
- 48773 10847.650 127.127.4.1 9714 -0.001605376 0.000000000 0.001424877
0.000958674
-
| Item |
Units |
Description |
| 48773 |
MJD |
date |
| 10847.650 |
s |
time past midnight |
| 127.127.4.1 |
IP |
source address |
| 9714 |
hex |
status word |
| -0.001605376 |
s |
clock offset |
| 0.000000000 |
s |
roundtrip delay |
| 0.001424877 |
s |
dispersion |
| 0.000958674 |
s |
RMS jitter |
- The status field is encoded in hex format as described in Appendix B of
the NTP specification RFC 1305.
- protostats
- Record significant peer, system and [rptpcp; events. Each significant event
appends one line to the protostats file set:
- 49213 525.624 128.4.1.1 963a 8a message
-
| Item |
Units |
Description |
| 49213 |
MJD |
date |
| 525.624 |
s |
time past midnight |
| 128.4.1.1 |
IP |
source address (0.0.0.0 for system) |
| 963a |
code |
status word |
| 8a |
code |
event message code |
| message |
text |
event message |
- The event message code and message field are described on
the Event Messages and Status Words page.
- rawstats
- Record timestamp statistics. Each NTP packet received appends one line to
the rawstats file set:
- 50928 2132.543 128.4.1.1 128.4.1.20 3102453281.584327000 3102453281.58622800031
02453332.540806000 3102453332.541458000
-
| Item |
Units |
Description |
| 50928 |
MJD |
date |
| 2132.543 |
s |
time past midnight |
| 128.4.1.1 |
IP |
source address |
| 128.4.1.20 |
IP |
destination address |
| 3102453281.584327000 |
NTP s |
origin timestamp |
| 3102453281.586228000 |
NTP s |
receive timestamp |
| 3102453332.540806000 |
NTP s |
transmit timestamp |
| 3102453332.541458000 |
NTP s |
destination timestamp |
- sysstats
- Record system statistics. Each hour one line is appended to the sysstats file
set in the following format:
- 50928 2132.543 3600 81965 0 9546 56 512 540 10 4 147 1
-
| Item |
Units |
Description |
| 50928 |
MJD |
date |
| 2132.543 |
s |
time past midnight |
| 3600 |
s |
time since reset |
| 81965 |
# |
packets received |
| 0 |
# |
packets for this host |
| 9546 |
# |
current versions |
| 56 |
# |
old version |
| 512 |
# |
access denied |
| 540 |
# |
bad length or format |
| 10 |
# |
bad authentication |
| 4 |
# |
declined |
| 147 |
# |
rate exceeded |
| 1 |
# |
kiss-o'-death packets sent |
- timingstats
- (Only available when the deamon is compiled with process time debugging
support (--enable-debug-timing - costs performance). Record processing time
statistics for various selected code paths.
- 53876 36.920 10.0.3.5 1 0.000014592 input processing delay
-
| Item |
Units |
Description |
| 53876 |
MJD |
date |
| 36.920 |
s |
time past midnight |
| 10.0.3.5 |
IP |
server address |
| 1 |
# |
event count |
| 0.000014592 |
s |
total time |
| message |
text |
code path description (see source) |