BIND 10 #2755: the use of "list" structures for configuration considered harmful

[BIND 10 Development]

#2755: the use of "list" structures for configuration considered harmful
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            Reporter:  cas           |                        Owner:
                Type:  defect        |                       Status:  new
            Priority:  medium        |                    Milestone:  New
           Component:  Unclassified  |  Tasks
            Keywords:                |                   Resolution:
           Sensitive:  0             |                 CVSS Scoring:
         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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Comment (by cas):

 Replying to [comment:1 vorner]:
 >There's a need for list in data_sources (the ordering does matter, for
 performance and for preference if the zone is provided from more places).

 while a "list" structure does  matter for performance, it should only
 exist in memory in the processes, but not in the configuration files
 (neither on the server, nor in the API or in the user interfaces).

 where ordering does matter, the configuration objects should have a
 property of "priority/preference" or "weight". DNS, DHCP and Network
 admins are familiar with that concepts (MX-, SRV-records, DHCP server
 priority, router priority in OSPF). The order is generated when the
 configuration is applied based on the relative values.

 Using "priority/preference/weight" values, the values can be set without
 knowing the list index and without overwriting other existing
 configuration items.

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Ticket URL: <http://bind10.isc.org/ticket/2755#comment:2>
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