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Shorter periods

The goal here is to shorten some periods of the protocol:

  • cycles will last 4 hours
  • test a mainnet node with 4 hours GC
  • tolerated inactivity period will be differentiated according to the staking power

Have a look at %Protocol periods shortening to see what has been done previously for period shortening.

Work breakdown

  • change cycle length to 4 hours for mainnet and ghostnet !17583 (merged)
    • change the parametric constant
    • keep voting period to 14 days
    • change delegate parameters delay to preserve the same timing
    • document the change in tezos.gitlab.io
    • add an entry in protocol changelog
    • check that baking rights distribution over cycles fits the stake distribution as before
    • check that 4 hours cycles are fine with respect to context GC in rolling mode
      • GC start in the second quarter of the cycle, they have thus, at worth 2 hours to complete
      • GC last less than the remaining time on low end machine (1h)
  • make tolerated_inactivity_period three constants (high, low, threshold) !17582 (merged)
    • implement
    • adapt tests
    • add tests !19295 (closed)
    • ensure that reactivation is smooth (no deactivation after reactivation due to loss of rights)
    • document the change in tezos.gitlab.io !19127 (merged)
    • add an entry in protocol changelog
    • adapt/duplicate tezt test of tolerated_inactivity_period change in protocol_migration.ml
  • change consensus_rights_delay to one cycle !18783 (merged)
    • implement
    • adapt tests
    • add tests
    • document the change in tezos.gitlab.io
    • add an entry in protocol changelog
  • Manual migration test on mainnet and ghostnet contexts