Commit Graph

9 Commits

Author SHA1 Message Date
Riccardo Spagni 4308a2e173
Merge pull request #5318
1a91385e block_weight: fix python 2/3 compatibility (moneromooo-monero)
2019-04-01 17:37:57 +02:00
moneromooo-monero 1a91385eaf
block_weight: fix python 2/3 compatibility 2019-04-01 15:31:52 +00:00
moneromooo-monero 9b687c7873
blockchain: simple cache for the long term block weights 2019-03-28 18:07:57 +00:00
Riccardo Spagni 5ac46c5310
Merge pull request #5256
4b21d38d blockchain: speed up getting N blocks weights/long term weights (moneromooo-monero)
2019-03-21 14:48:40 +02:00
moneromooo-monero 4b21d38dfd
blockchain: speed up getting N blocks weights/long term weights 2019-03-08 12:04:14 +00:00
moneromooo-monero fa43b54780
tests: handle any cmake detected python interpreter 2019-03-07 16:46:02 +00:00
moneromooo-monero 79b4e9f377
save some database calls when getting top block hash and height 2019-03-05 11:58:05 +00:00
moneromooo-monero b044d03a51
Avoid repeated (de)serialization when syncing 2019-03-05 11:57:55 +00:00
moneromooo-monero b8787f4302
ArticMine's new block weight algorithm
This curbs runaway growth while still allowing substantial
spikes in block weight

Original specification from ArticMine:

here is the scaling proposal
Define: LongTermBlockWeight
Before fork:
LongTermBlockWeight = BlockWeight
At or after fork:
LongTermBlockWeight = min(BlockWeight, 1.4*LongTermEffectiveMedianBlockWeight)
Note: To avoid possible consensus issues over rounding the LongTermBlockWeight for a given block should be calculated to the nearest byte, and stored as a integer in the block itself. The stored LongTermBlockWeight is then used for future calculations of the LongTermEffectiveMedianBlockWeight and not recalculated each time.
Define:   LongTermEffectiveMedianBlockWeight
LongTermEffectiveMedianBlockWeight = max(300000, MedianOverPrevious100000Blocks(LongTermBlockWeight))
Change Definition of EffectiveMedianBlockWeight
From (current definition)
EffectiveMedianBlockWeight  = max(300000, MedianOverPrevious100Blocks(BlockWeight))
To (proposed definition)
EffectiveMedianBlockWeight  = min(max(300000, MedianOverPrevious100Blocks(BlockWeight)), 50*LongTermEffectiveMedianBlockWeight)
Notes:
1) There are no other changes to the existing penalty formula, median calculation, fees etc.
2) There is the requirement to store the LongTermBlockWeight of a block unencrypted in the block itself. This  is to avoid possible consensus issues over rounding and also to prevent the calculations from becoming unwieldy as we move away from the fork.
3) When the  EffectiveMedianBlockWeight cap is reached it is still possible to mine blocks up to 2x the EffectiveMedianBlockWeight by paying the corresponding penalty.

Note: the long term block weight is stored in the database, but not in the actual block itself,
since it requires recalculating anyway for verification.
2019-03-04 09:33:58 +00:00