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Distributed Database

Featuring:

  • Multiversion Concurrency Control
  • Deadlock Detection
  • Replication
  • Failure Recovery

Algorithms:

  • Available Copies
  • Two Phase Locking
  • Multiversion Read Consistency
  • Validation at Commit
  • Abort Youngest in Cycle

Two ways to run:

  1. File Based: provide a path to a file
  2. Interactive: Do not include a file
  • Commands will be executed as they are entered
  • Type exit to finish

Commands:

  • Needs .Net Core 1.1 is installed
    • dotnet portable/src.dll <file>
  • Standalone:
    • Mac OSX: ./standalone/osx/src <file>
    • Ubuntu 16.04: ./standalone/ubuntu/src <file>

Available operations:

  • begin(T1) - begins a transaction named T1
  • beginRO(T1) - begins a read-only transaction named T1
  • R(T1,x1) - transaction T1 attempts to read variable x1
  • W(T1,x1,100) - transaction T1 attempts to write variable x1 with value 100
  • end(T1) - transaction T1 is either committed or aborted
  • fail(1) - site 1 fails
  • recover(1) - site 1 recovers
  • dump() - shows the current state of all variables at all sites
  • dump(i) - shows the current state of all variables at site i
  • dump(xj) - shows the current state of variable xj at all sites
  • newline - time advances by one
  • ; - separator for concurrent events

Built With: