doc::Smokeping::probes::AnotherDNS(SmokePdoc::Smokeping::probes::AnotherDNS(3)



NAME
       Smokeping::probes::AnotherDNS - Alternate DNS Probe

SYNOPSIS
        *** Probes ***

        +AnotherDNS

        forks = 5
        offset = 50%
        step = 300

        # The following variables can be overridden in each target section
        lookup = www.example.org
        mininterval = 0.5
        pings = 5
        port = 53
        recordtype = A
        require_answers = 0
        require_noerror = 0
        timeout = 5

        # [...]

        *** Targets ***

        probe = AnotherDNS # if this should be the default probe

        # [...]

        + mytarget
        # probe = AnotherDNS # if the default probe is something else
        host = my.host
        lookup = www.example.org
        mininterval = 0.5
        pings = 5
        port = 53
        recordtype = A
        require_answers = 0
        require_noerror = 0
        timeout = 5

DESCRIPTION
       Like DNS, but uses Net::DNS and Time::HiRes instead of dig. This probe
       does *not* retry the request three times before it is considerd "lost",
       like dig and other resolver do by default. If operating as caching
       Nameserver, BIND (and maybe others) expect clients to retry the request
       if the answer is not in the cache. So, ask the nameserver for something
       that he is authoritative for if you want measure the network packet
       loss correctly.

       If you have a really fast network and nameserver, you will notice that
       this probe reports the query time in microsecond resolution. :-)

VARIABLES
       Supported probe-specific variables:

       forks
           Run this many concurrent processes at maximum

           Example value: 5

           Default value: 5

       offset
           If you run many probes concurrently you may want to prevent them
           from hitting your network all at the same time. Using the probe-
           specific offset parameter you can change the point in time when
           each probe will be run. Offset is specified in % of total interval,
           or alternatively as 'random', and the offset from the 'General'
           section is used if nothing is specified here. Note that this does
           NOT influence the rrds itself, it is just a matter of when data
           acqusition is initiated.  (This variable is only applicable if the
           variable 'concurrentprobes' is set in the 'General' section.)

           Example value: 50%

       step
           Duration of the base interval that this probe should use, if dif-
           ferent from the one specified in the 'Database' section. Note that
           the step in the RRD files is fixed when they are originally gener-
           ated, and if you change the step parameter afterwards, you'll have
           to delete the old RRD files or somehow convert them. (This variable
           is only applicable if the variable 'concurrentprobes' is set in the
           'General' section.)

           Example value: 300

       Supported target-specific variables:

       lookup
           Name of the host to look up in the dns.

           Example value: www.example.org

       mininterval
           Minimum time between sending two lookup queries in (possibly frac-
           tional) seconds.

           Default value: 0.5

       pings
           How many pings should be sent to each target, if different from the
           global value specified in the Database section. Note that the num-
           ber of pings in the RRD files is fixed when they are originally
           generated, and if you change this parameter afterwards, you'll have
           to delete the old RRD files or somehow convert them.

           Example value: 5

       port
           The UDP Port to use.

           Default value: 53

       recordtype
           Record type to look up.

           Default value: A

       require_answers
           Only Count Answers with answer count >= this value.

           Default value: 0

       require_noerror
           Only Count Answers with Response Status NOERROR.

           Default value: 0

       timeout
           Timeout for a single request in seconds.

           Default value: 5

AUTHORS
       Christoph Heine <Christoph.Heine@HaDiKo.DE>



2.4.2                             2008-07doc::Smokeping::probes::AnotherDNS(3)
