BIND 10 #1751: stats doesn't separate or consolidate reports from multiple auth instances

[BIND 10 Development]

#1751: stats doesn't separate or consolidate reports from multiple auth instances
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            Reporter:  jinmei        |                        Owner:
                Type:  defect        |                       Status:  new
            Priority:  major         |                    Milestone:  Next-
           Component:  statistics    |  Sprint-Proposed
           Sensitive:  0             |                     Keywords:
         Sub-Project:  Core          |              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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 If we run multiple b10-auth instances, each submits statistics
 to b10-stats.  (I've not looked into the code but it appears that)
 b10-stats doesn't distinguish these reports, so depending on the
 timing we see two different sets of statistics via bindctl or the http
 server (you can see it at
 http://ns.jinmei.org:8853/bind10/statistics/xml)

 This is obviously bad.  I can think of several ways to address this
 issue:
 - consolidate all reports from b10-auth and present the unified
   statistics only.
 - maintain the separate reports and show them separetely.
 - support both mode.

 The primary concern of the administrator would be the consolidated
 (i.e. whole-system) statistics, so the first choice seems reasonable.
 But the second one may not be that bad, because it would provide some
 useful information such as when queries are not equally distributed.
 And, the consolidated information can be calculated from separate
 reports (but not vice versa).  To this end the third one may be the
 best if we can show it without being too noisy.

 In either case, different instances of the auth server need to
 uniquely identify themselves in the statistics reports.  I don't know
 if they are doing it right now, but if not, we first need to implement
 that feature.

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Ticket URL: <http://bind10.isc.org/ticket/1751>
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BIND 10 Development