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       cfetoolupdate - Update the database with a new value


       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]


       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
       working directory if the -p argument is ommitted. The value will be
       associated 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.


       --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.

           The time the value was collected, in seconds since epoch (January
           1st, 1970).  If this argument is omitted, the current time will be

           Update the daily averages database.

           Update the weekly averages database.

           Update the yearly averages database.

           Communicate with cfengine. If this option is specified, cfetool
           will define classes understandable by cfagent. For more
           information, refer to the documentation for cfenvd.

           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

           Print details of the command’s execution to the standard output

           Print a short help message and then exit.


       Before exiting, "cfetool update" will print one line to the standard
       output stream in the following format:


       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

       "cfetool update" also exits with a code corresponding to the above
       table. 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.


         % cfetool update temperature --path /my/path --value 14.5 --histograms

       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


       The code and documentation were contributed by Stanford Linear
       Accelerator Center, a department of Stanford University.  This
       documentation was written by

       Elizabeth Cassell <> and
       Alf Wachsmann <>


        Copyright 2004 Alf Wachsmann <> and
                       Elizabeth Cassell <>
        All rights reserved.