BIND 10 #1074: Use debug levels consistently

[BIND 10 Development]

#1074: Use debug levels consistently
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            Reporter:  stephen       |                        Owner:
                Type:  enhancement   |                       Status:  new
            Priority:  minor         |                    Milestone:
           Component:  logging       |  Sprint-20110712
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 (Summarised from bind10-dev, 29 June 2011)

 >> missing debug number ("A debug message" or "only appear if debug  is
 enabled" is too vague -- when will it be logged at what debug level?)

 >> I think there should be separate "DEBUG" severity for developers
 too.... now we have debug message useful for admins to debug and then
 other debug message clearly only useful for admins (even referring to
 specific code "the RecursiveQuery::resolve method...").

 > Agreed.  Although 100 debug levels are available, for consistency we
 need to define how they are used.  We have discussed the idea of debug
 levels of 20 or below being used for messages that might be useful to
 !SysAdmins and levels above 20 being reserved for "programmer-level"
 messages.  Perhaps now is the time to formalise that?"

 This ticket should be done after all other tickets relating to the
 addition of logging messages have been completed.  The categories of debug
 messages should be reviewed and debug levels assigned such that the
 correspondence between category and level is consistent across all
 modules.

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Ticket URL: <http://bind10.isc.org/ticket/1074>
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