Need help to get raw block data to analyze orphan rates variation over time

[Sergio_Demian_Lerner]

Hi!
I want to analyze how orphan rates have changed over time, under very different network topologies, such as one there were a few nodes.

Do anyone has a copy of a block-chain created during the 2009-2010 period ?

The blkNNNN.dat files should contain the orphans created. From those files I only need the file blk00000.dat, since it contains all the blocks in that period.

Best regards,
 Sergio.

[deepceleron]

I have re-downloaded and sanitized my blockchain of that cruft several times. What you are asking, to clarify, is someone that still has a Bitcoin client around, with the original blockchain as-downloaded, that was also running continuously (not running continuously = inaccurate record of blocks seen on network). Also remember that duplicate block numbers seen after the first are ignored, not stored, only people that originally believed an orphan would have a chance of still having it.

[gmaxwell]

What you probably want to do is to take some python blockscanning tool, teach it the block hashes you already know, and ask people to run it on their own chain files and have it send you the blocks that you haven't seen.

There was an old blk000.dat that used to be hosted with the blockexplorer stuff that had a lot of fun reorgs in it.

I agree it would be good for someone to collect this data.

[Taras]

Superbump - did anyone ever come up with this kind of data? I'd like to find the raw hex of as many orphans as possible.

[Remember remember the 5th of November]

My blockchain was initialized in 2011, I don't believe I have deleted it since, but it has not been running continuously, and I've had periods where I had not run it for months.