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Delayed Node #170

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bytemaster opened this issue Aug 15, 2017 · 4 comments
Closed

Delayed Node #170

bytemaster opened this issue Aug 15, 2017 · 4 comments
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Someday Maybe - f...

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@bytemaster
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We need the ability to have one node keep its state behind the main node by N blocks where N is between 0 and last irreversible blocks.

This will help build micro services that cannot handle reversing blocks on a chain reorg.
@bytemaster bytemaster added this to the EOS Beta milestone Aug 15, 2017
@nathanielhourt
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Previously this was done by having a front node that stays in sync, and only pushes blocks to the back node when they're sufficiently old, right? Now that we track round changes in the block headers, I suppose the delayed node could be self-sufficient, tracking headers for the blocks its not ready to trust yet, but keeping them on hand until they get sufficiently confirmed to apply.

ljrprocc pushed a commit to bithacks-tech/myeosio that referenced this issue Jul 4, 2018
Merge pull request EOSIO#170 from enumivo/staging
bbb9efa 
Staging
@jgiszczak
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Partially implemented as the read-mode option, accepting speculative, head, or read-only as possible arguments. Mode irreversible is not yet supported.

@brianjohnson5972
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@wanderingbort or @heifner Should this ticket be closed and a new issue created to just cover the remaining types of nodes or should we just close this ticket?

@wanderingbort
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At the very least, we need a clean break between the probabilistic version of finality implied by lagging by N blocks and our algorithmic finality. Continuing to confuse this key difference in the EOSIO protocol is misleading observers. I am going to close this issue in favor of supporting the actually safe and novel classes of nodes like irreversible mode. We should have tickets for those instead

NorseGaud pushed a commit that referenced this issue Jul 30, 2019
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@nathanielhourt @bytemaster @wanderingbort @heifner @brianjohnson5972 @jgiszczak