CFETOOLUPDATE(1) User Contributed Perl Documentation CFETOOLUPDATE(1)NAME
cfetool update - Update the database with a new value
SYNOPSIS
cfetool update name --value⎪-V value [--path⎪-p directory name]
[--time⎪-t seconds] [--daily⎪-d] [--weekly⎪-w] [--yearly⎪-y]
[--cfenvd⎪-c] [--histograms⎪-H] [--verbose⎪-v] [--help⎪-h]
DESCRIPTION
Takes a new value and uses it to update the database specified by name,
located at the path specified by the -p argument, or the current work‐
ing directory if the -p argument is ommitted. The value will be associ‐
ated with the current time, unless the -t option is given. In order for
cfetool to function properly, this command should be issued at least
once during each interval specified by the --step option of "cfetool
create".
The -d, -w and -y options specify the databases to update. If all three
options are omitted, only the weekly database will be updated.
OPTIONS
--value⎪-v value
Specifies a new value to update the database with.
--path⎪-p directory name
The directory in which the database specified by name can be found.
--time⎪-t
The time the value was collected, in seconds since epoch (January
1st, 1970). If this argument is omitted, the current time will be
used.
--daily⎪-d
Update the daily averages database.
--weekly⎪-w
Update the weekly averages database.
--yearly⎪-y
Update the yearly averages database.
--cfenvd⎪-c
Communicate with cfengine. If this option is specified, cfetool
will define classes understandable by cfagent. For more informa‐
tion, refer to the documentation for cfenvd.
--histograms⎪-H
Collect histogram information about the probability distribiution
of fluctuations about the mean value over all times of day. Cfetool
won't write anything to this file for the first four weeks, as it
has to have reliable mean values in order to accurately calculate
it.
--verbose⎪-v
Print details of the command's execution to the standard output
stream.
--help⎪-h
Print a short help message and then exit.
OUTPUT
Before exiting, "cfetool update" will print one line to the standard
output stream in the following format:
yrly=ynum,wkly=wnum,dly=dnum
ynum, wnum and dnum will be either the number 0 if the corresponding
database was not updated, or a code indicating the state of the given
statistic, as compared to an average of equivalent earlier times, as
specified below:
code high⎪low⎪normal meaning
-------------------------------------------------------------
-2 - no sigma variation
-------------------------------------------------------------
-4 low within noise threshold, and within
-5 normal 2 standard deviations from
-6 high expected value
-------------------------------------------------------------
-14 low microanomaly: within noise
-15 normal threshold, but 2 or more standard
-16 high deviations from expected value
-------------------------------------------------------------
-24 low normal; within 1 standard deviation
-25 normal from the expected value
-26 high
-------------------------------------------------------------
-34 low dev1; more than 1 standard
-35 normal deviation from the expected
-36 high value
------------------------------------------------------------
-44 low dev2; more than 2 standard
-45 normal deviations from the expected
-46 high value
-------------------------------------------------------------
-54 low anomaly; more than 3 standard
-55 normal deviations from the expected
-56 high value
Where "low" indicates that the current value is below both the expected
value for the current time position, and the global average value.
"high" indicates that the current value is above those values. "normal"
indicates that the current value is within the range of expected val‐
ues.
"cfetool update" also exits with a code corresponding to the above ta‐
ble. If more than one database is being updated, the most negative
result from the updates is returned, and the individual results must be
obtained from the standard output stream, as described above.
EXAMPLE
% cfetool update temperature --path /my/path --value 14.5 --histograms
yrly=0,wkly=-6,dly=0
Updates the weekly temperature database and histogram files located in
/my/path/ with the value 14.5 using the current time as the update
time. The output indicates that only a weekly database was updated, and
the new value given was within cfetool's noise threshold, and also
within 2 standard deviations of the previous average stored in the
database.
AUTHORS
The code and documentation were contributed by Stanford Linear Acceler‐
ator Center, a department of Stanford University. This documentation
was written by
Elizabeth Cassell <e_a_c@mailsnare.net> and
Alf Wachsmann <alfw@slac.stanford.edu>
COPYRIGHT AND DISCLAIMER
Copyright 2004 Alf Wachsmann <alfw@slac.stanford.edu> and
Elizabeth Cassell <e_a_c@mailsnare.net>
All rights reserved.
perl v5.8.4 2004-09-21 CFETOOLUPDATE(1)
