[B_as_Para] Setup elastic scaling for bulletin-westend - as close as possible to the production

[bkontur]

Relates to: paritytech/polkadot-sdk#9880

TODO

• enabled elastic scaling, block/slot times, block length, ... -> 2s blocks

[lexnv]

I would wait until the PR gets merged. Most likely, it will change a bit before merging:

• ah-westend: Elastic Scaling with 3 cores on AssetHub Westend polkadot-sdk#9880

[bkontur]

@lexnv Hey Alex, qq, is it possible to setup 2s blocks for bulletin-westend parachain (at least to try locally with westend-local) here: #83?

[lexnv]

Hey, yep it is entirely possible:

• you will need to add the configs to the runtime similar to this file: https://github.com/paritytech/polkadot-sdk/pull/9880/files#diff-a81a7d2eaeeb3b6f1256b7b96b1f43a2447943f498f053ecf1e511bdbfa04cd1
• ensure you have sufficient cores in the genesis overrides of zombinet: https://github.com/paritytech/polkadot-sdk/pull/9880/files#diff-6526f83bac0c07c39091b3081c3314771d887b19c3cbb53c20e537807db45126R38
• collators must start with slot-based authoring: https://github.com/paritytech/polkadot-sdk/pull/9880/files#diff-6526f83bac0c07c39091b3081c3314771d887b19c3cbb53c20e537807db45126R57
• please ensure you have at least 3 collators for zombinet, and 10-12 validators on the relay chain
• your chain will have 1 core by default and you'll need to assign 2 more in zombinet: https://github.com/paritytech/polkadot-sdk/pull/9880/files#diff-6526f83bac0c07c39091b3081c3314771d887b19c3cbb53c20e537807db45126R57 (ie vec![0, 1])

[bkontur]

@antkve the result is that bulletin-westend is producing 2s blocks locally

[bkontur]

postponed for now