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  1. .FP lucidasans
  2. .TL
  3. The Plan 9 File Server
  4. .AU
  5. Ken Thompson
  6. ken@plan9.bell-labs.com
  7. .AB
  8. This paper describes the structure
  9. and the operation of Plan 9 file servers.
  10. The specifics apply to
  11. our main Plan 9 file server
  12. Emelie,
  13. but
  14. the code is also the basis for
  15. the user level file server
  16. .CW kfs .
  17. .AE
  18. .SH
  19. Introduction
  20. .PP
  21. The Plan 9 file server
  22. Emelie
  23. is the oldest piece of system software
  24. still in use on Plan 9.
  25. It evolved from a user-level program that served
  26. serial lines on a Sequent multi-processor.
  27. The current implementation is neither clean nor
  28. portable,
  29. but it has slowly come to terms with
  30. its particular set of cranky computers
  31. and devices.