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RFC 19 - Two Protocol Suggestions to Reduce Congestion at Swap-Bound Nodes

  • Status: Unknown
  • Published: 7 October 1969
  • Stream: Legacy
  • Errata: No Errata

Document Information​

  • RFC Number: 19
  • Title: Two Protocol Suggestions to Reduce Congestion at Swap-Bound Nodes
  • Authors: John E. Kreznar (SDC)
  • Date: 7 October 1969
  • Category: Unknown

Abstract​

RFC 19 proposes two protocol changes intended to reduce the cost of swapping at hosts that are bound by the speed of their swap store. The first would let a HOST read its IMP's queue of waiting messages and accept them in whatever order it finds most effective, instead of in the order the IMP received them, so that a time-sharing host need not swap users in and out repeatedly to match the arrival order. The second would have cooperating HOSTs agree to lock the programs involved in core for the duration of a multi-message file transfer over an auxiliary connection; the author works out that at 50 kilobits per second this is practical only for files of roughly 2 to 16 messages, but argues that the gain for large transfers still deserves consideration. The memo closes with the ARPANET distribution list.

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