Comments (6)
I am pretty sure this is the same bug we have been experiencing when running 7.17.3 when starting up testnet. It is so slow that you cannot run DigiByte Core Testnet on a Pi 4 as the syncing never catches up with the present. Starting up 7.17.3 testnet can take 15 hours or more on my old Windows laptop. It currently makes running a testnet node a pain in the ass. Evidently the problem still exists in 8.22 RC2.
This was discussed at length a few months back. @chappjc has previously shared all the details in Gitter. He also made a PR with a possible fix: #102
The problem only happens in testnet. Mainnet is not affected. v8 should definitely not be released until this is fixed.
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Same experience here. I'm passed the 24 hour mark on the "Loading Block Index." "It's not a problem on mainnet, because there are blocks for each algo in mainnet. In testnet we don't have certain algos, so DigiByte-Core intensely tries to find one of these specific algo blocks. Which uses a lot of computational resources if done a few million times." I believe it is unique to DGB because of multi-algo, and the sheer number of blocks involved.
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This is outside my knowledge of how multialgo works, but I wonder if this could be solved by finding people to mine on testnet using the algos for which no blocks have been discovered yet. This would mean that for each algo there are then at least a few blocks that exist. I wonder if that would help?
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@chappjc If you have been mining on testnet, and have a surplus of DGBT coins, it might be helpful for the community to send them to Renzo's Testnet Faucet: https://digifaucet.org/testnet
With a larger supply he can increase the payout per transaction. This will make it easy for anyone who needs DGBT to get some without having to mine on testnet themselves.
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@saltedlolly That's right to the heart of the issue. I have actually had a process doing just that since April, alternating 3 of the algorithms that the built-in CPU miner can do efficiently (skein, sha256d, qubit). Note how the version alternates as you go through blocks: https://testnetexplorer.digibyteservers.io/block/2322092
However, even if it was doing all the algos, including scrypt and odo, it wouldn't change the fact that there are years of consecutive blocks that block index loading (and initial block import) has to deal with.
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With #142 merged the headers sync is much improved.
I have also encountered this issue of digibyte-cli freezing (it can freeze and take a long time before it returns a response - often several minutes).
Can anything be done?
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Related Issues (20)
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