How many stale blocks can be minted in 1.7?

I saw my mining rig followed
300~400 stale chain compare to
block explorer.
Is it normal situation?
Stale chain can grow up before connecting to a peer holding main chain?

How does fork logic choice main block?

  • highest chain?
  • old chain?
  • high difficulty?

block a: 26 difficulty block minted at 14:00:00
block b: 27 difficulty block minted at 14:00:01
block c: 28 difficulty block minted at 14:00:59
a,b,c are from same parent block.

block c is regareded as promising to be included main chain in 1.7?

Let me know how to calculate weight of chain
and when does fork fuction start working

  • after 30 blocks trailing?
  • every 30 minues?
  • when meet different block?

We see nodes occasionally creating long forks, especially when they lose “good” peers and get isolated. By good peers, I mean a node connected to other nodes and propagating the heaviest blockchain of the network to my node. When a node gets isolated, it will start mining by itself, continuously growing its fork.

Given multiple forks, the node chooses the heaviest one. The weight of a fork is the sum of the difficulty of each block in the fork. In your example, a node will choose Block C since that is the heaviest.

A node resolves forks whenever it encounters one.

You can read how the node compares forks in the link below. I will circle back w/ a plain English explanation later. I want to answer your other questions first.

thanks again.
I understood.
how do you think about
this mining strategy

  • start solving quiz with higher difficulty by increasing original difficulty
  • if found nonce, never solve quiz again,
    but just wait next quiz.
  • close connection to peers if stale blocks are increasing.

When I examine the main blocks
the main block difficulty is not much higher
than i expected.
1 or 2 higher than given condition.

1.7 has a similar strategy implemented already. When it successfully mines a block, and it took less than the goal block time, instead of mining the next block, the node continues to mine the current block, hoping to mine a block with greater difficulty than the current one. The idea behind the strategy is similar to yours, optimize for the weight, not length.

I want to note that we will see fewer forks as the difficulty of the network increases, which we expect to happen soon.