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MicroKernel & NodeStore

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Jukka Zitting
Jukka Zitting
Technology
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MicroKernel & NodeStore two sides of the same coin
MicroKernel (interface)  Designed with remoting and potential non-Java implementations in mind  RPC-like, with JSON/P serialization  Two main implementations:  MongoMK (the new MongoDB-based MK)  “H2” MK (old one, to be deprecated)
NodeStore  Mapping of MK concepts to an object- oriented, native Java set of interfaces  Omissions: direct journal access, filter rules  Extensions: NodeBuilder, NodeStateDiff  No serialization, random access possible  Three main implementations  MemoryNodeStore (for testing, utilities)  KernelNodeStore (MK mapping)  SegmentNodeStore (the Segment/TarMK)
MicroKernel (architecture)  Key points  Basic content tree model  MVCC-based revisions  Merging of concurrent changes  Any implementation a “MicroKernel”, regardless of the specific interface

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MicroKernel & NodeStore

  • 2. MicroKernel (interface)  Designed with remoting and potential non-Java implementations in mind  RPC-like, with JSON/P serialization  Two main implementations:  MongoMK (the new MongoDB-based MK)  “H2” MK (old one, to be deprecated)
  • 3. NodeStore  Mapping of MK concepts to an object- oriented, native Java set of interfaces  Omissions: direct journal access, filter rules  Extensions: NodeBuilder, NodeStateDiff  No serialization, random access possible  Three main implementations  MemoryNodeStore (for testing, utilities)  KernelNodeStore (MK mapping)  SegmentNodeStore (the Segment/TarMK)
  • 4. MicroKernel (architecture)  Key points  Basic content tree model  MVCC-based revisions  Merging of concurrent changes  Any implementation a “MicroKernel”, regardless of the specific interface