Kevin Hammond has proposed that Cardano governance get a faster way to disable the Leios scaling system in a serious network emergency. Restarting Leios would still follow normal rules, and the current CAP-12 draft forbids the zero setting the shutdown would need.
Cardano could let governance switch off its proposed Leios scaling system faster during a serious network problem, while restarts stay under normal approval rules. Kevin Hammond set out the approach in the CAP-12 technical discussion, calling it a proposed Technical Steering Committee position ahead of a Nov. 18 review.
How the emergency switch would work
The switch would disable Leios's additional transaction-processing path while preserving ordinary block production. It would set maxEndorserBlockTxsSize, the limit on transaction payload endorsed by a supplementary block, to zero.
For a Severity 1 or Severity 2 network issue, Hammond's fast path would waive the PARAM-04a notice requirement and allow the move to zero in any epoch. Switching Leios back on would follow the normal process and stay subject to the network-group frequency limit.
Emergency deactivation would still need governance approval. Hammond said ratification and enactment would still take at least one epoch boundary.
CAP-12 currently forbids zero
There is a conflict, however. CAP-12 version 5, which remained open on Nov. 8, prohibits zero-valued Leios parameters. Intersect's Nov. 6 update confirms that the off switch was removed from the constitutional text, with deactivation left to the hard-fork plan and another draft expected.
Hammond also made his route conditional on written confirmation from the Linear Leios team about what zero does. He required switch-off and switch-back-on exercises on the Preview and Preprod test networks, plus conformance tests for the zero setting across all node implementations.
Leios is still in testing
The Nov. 3 working-group minutes say the test network entered the Dijkstra era on Nov. 2 using node 11.2, without full Leios implementation. Intersect said on Nov. 6 that full Leios was available for early integration testing on Musashi, while the combined node 11.3 release candidate was estimated to be at least two to three weeks away.
Those minutes also record an aim to submit the constitution and guardrails by Nov. 25. Hammond said on Nov. 6 that the Parameter Committee had not yet seen the pending numerical values.
Source: CryptoSlate
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