BIND 10 #2331: design of shared memory / mmap based in-memory data source

[BIND 10 Development]

#2331: design of shared memory / mmap based in-memory data source
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |                       Status:  new
            Priority:  medium        |                    Milestone:  New
           Component:  data source   |  Tasks
           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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 We eventually need to support this; otherwise multiple instances of
 b10-auth require multiple copies of in-memory image for the same data.
 Obviously it doesn't scale with huge size of zones and many instances
 of b10-auth running on many-core boxes.

 Actually we shouldn't be very far from this goal.  The internal data
 structures should be fully offset-pointer based, and all memory
 allocation/deallocation are encapsulated with an abstraction of
 `MemorySegment`, which should be easily adapted to Boost
 managed_shared_memory or managed_mapped_file.

 We still have to think about several non trivial things:

 - overall design of a memory management process (assuming there will
   be a new module, tentatively named "b10-memmgr").  how to create and
   update memory image in a shared memory region or on a mapped file.
 - inter-module protocol between memmgr and others (auth, xfrin,
   DDNS, etc)
 - maybe configuration

 The goal of this ticket is to have discussions on these topics, maybe
 led by someone with initial proposals, and (possibly) create specific
 development tickets.

-- 
Ticket URL: <http://bind10.isc.org/ticket/2331>
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BIND 10 Development