Here are some proposals regarding the minimum block size questions, as well as other related scalability issues.

Dynamic block size limit controller (maaku)

https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg07599.html

https://www.reddit.com/r/Bitcoin/comments/35c47x/a_proposal_to_expand_the_block_size/

Re: dynamic block size limit controller (gmaxwell)

https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg07620.html

Various other gmaxwell-relayed ideas

http://www.reddit.com/r/Bitcoin/comments/37pv74/gavin_andresen_moves_ahead_with_push_for_bigger/crp2735

Increasing the max block size using a soft-fork (Tier Nolan)

https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg07927.html

Elastic block cap with rollover penalties (Meni Rosenfield)

https://bitcointalk.org/index.php?topic=1078521

worked example https://bitcointalk.org/index.php?topic=1078521.msg11557115#msg11557115

section 6.2.3 of https://cryptonote.org/whitepaper.pdf

rollover transaction fees https://bitcointalk.org/index.php?topic=80387.0

Variable mining effort (gmaxwell)

http://sourceforge.net/p/bitcoin/mailman/message/34100485/

BIP100 Soft-fork limit of 2 MB (jgarzik)

http://gtf.org/garzik/bitcoin/BIP100-blocksizechangeproposal.pdf

Transaction fee targeting

https://bitcointalk.org/index.php?topic=176684.msg9416723#msg9416723

Difficulty target scaling

https://www.reddit.com/r/Bitcoin/comments/38937n/idea_make_the_difficulty_target_scale_with_block/

Annual 50% max block size increase

https://www.reddit.com/r/Bitcoin/comments/351dft/what_about_gavins_2014_proposal_of_having_block/

Various algorithmic adjustment proposals

https://bitcointalk.org/index.php?topic=1865.0

https://www.reddit.com/r/Bitcoin/comments/1owbpn/is_there_a_consensus_on_the_blocksize_limit_issue/ccwd7xh

https://www.reddit.com/r/Bitcoin/comments/35azxk/screw_the_hard_limit_lets_change_the_block_size/

https://www.reddit.com/r/Bitcoin/comments/359y0i/quick_question_about_the_block_size_limit_issue/

http://www.reddit.com/r/Bitcoin/comments/385xqj/what_if_block_size_limits_were_set_to_increase/

http://www.age-of-bitcoin.com/dynamic-block-size-cap-scaling/

(against) http://garzikrants.blogspot.com/2013/02/bitcoin-block-size-thoughts.html

Average over last 144 blocks

http://www.reddit.com/r/Bitcoin/comments/38fmra/max_block_size_2_average_size_of_last_144_blocks/

Extension blocks (Adam Back) (why would he burn this idea for something so trivial?)

https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg07937.html

https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg08005.html

http://www.reddit.com/r/Bitcoin/comments/39kqzs/how_about_a_softfork_optin_blocksize_increase/

http://www.reddit.com/r/Bitcoin/comments/39hgzc/blockstream_cofounder_president_adam_back_phd_on/cs3tgss

Voting by paying to an address (note: vote censorship makes this impractical, among other reasons)

http://www.reddit.com/r/Bitcoin/comments/3863vw/a_brandnew_idea_for_resolving_the_blocksize_debate/

http://www.reddit.com/r/Bitcoin/comments/1g0ywj/proposal_we_should_vote_on_the_blocksize_limit/

https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg02325.html

Vote by paying fees

https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg08164.html

https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg02323.html

Double the max block size at each block reward halving

https://www.reddit.com/r/Bitcoin/comments/359jdc/just_double_the_max_blocksize_on_every_block/

Reducing the block rate instead of increasing the maximum block size (Sergio Lerner)

https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg07663.html

https://www.reddit.com/r/Bitcoin/comments/35kpgk/sergio_lerner_on_bitcoindevelopment_reducing_the/

Decrease block interval

https://www.reddit.com/r/Bitcoin/comments/2vefmp/please_eli5_besides_increasing_the_block_size_why/

https://www.reddit.com/r/Bitcoin/comments/35hpkt/please_remind_me_once_again_why_we_cant_decrease/

Increase default soft block size limit in Bitcoin Core

http://www.reddit.com/r/Bitcoin/comments/38i6qr/why_not_increase_the_default_block_size_limit/

https://github.com/bitcoin/bitcoin/pull/6231

Consider the size of the utxo set when determining max block size (note that utxo depth cannot have consensus)

https://bitcointalk.org/index.php?topic=153401.20

Reduce and decrease the max block size

https://www.reddit.com/r/Bitcoin/comments/381ygv/who_is_in_favour_of_reducing_the_blocksize_limit/

https://www.reddit.com/r/Bitcoin/comments/2vedt4/better_we_make_block_size_50kb_and_test/

Change the value of MAX_BLOCK_SIZE in Bitcoin Core

https://bitcointalk.org/index.php?topic=140233.0

Problems with floating block size limits (petertodd)

https://bitcointalk.org/index.php?topic=144895.0

Develop other ways to support high transaction volumes (gavinandresen)

https://bitcointalk.org/index.php?topic=96097.msg1059475#msg1059475

Simplified payment verification

https://bitcoin.org/bitcoin.pdf

Lightning network

https://lightning.network/lightning-network-paper-DRAFT-0.5.pdf

GHOST

https://eprint.iacr.org/2013/881.pdf

Payment channels

https://bitcoinj.github.io/working-with-micropayments

Tree chains

http://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg04388.html

https://github.com/petertodd/tree-chains-paper

fedpeg + SPV

https://github.com/ElementsProject/elements/blob/7848ae0eed5506fb32872b6d74a12fd781aa3024/contrib/fedpeg/rotating_consensus.py

Known missing:

- old bitcoin-development proposals

- old bitcointalk proposals

- anything unique from IRC

On a related note, the other day I found that reading all of the -wizards logs regarding sidechains only takes 2 hours. So... that's something. YMMV.

- Bryan
http://heybryan.org/
1 512 203 0507

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