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[WIP] Optimize reindex process #1334

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furszy wants to merge 9 commits into from
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[WIP] Optimize reindex process #1334

furszy wants to merge 9 commits into from

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@furszy furszy commented Feb 14, 2020

This is on top of #1333 and #1332 . (First three commits).

Several changes:

  • Make reindex/import use AcceptBlock rather than ProcessNewBlock, so activation of the resulting best chain is delayed.
  • That delayed activation is handled by the existing "Activating best chain" step in the startup process, which is moved to ThreadImport.
  • Optimize ActivateBestChain to not walk the entire chain to find the most work chain to connect for each block (O(n^2) -> O(n)).

More information in upstream@7917.

Current issues: seems that the reindex process starts the sync all over once it's completed.

@furszy
Peer initialization issues, bitcoin#8392 backport
ebbb876
@furszy
[GUI] Do not update the GUI so often when reindex/import is being exe…
d775529 
…cuted.
@furszy
fReindex and fImporting moved to atomic bool.
301a1f9 
Both files are being accessed from different threads, including the UI thread.
@furszy
Make ProcessNewBlock dbp const and update comment.
6294821 
Coming from upstream@d253ec4baa21cc292cf72d453f71b4043b53e591
@furszy
Switch reindexing to AcceptBlock in-loop and ActivateBestChain afterw…
2ec434e 
…ards.

Coming from upstream@316623f2c197971db9b5bcb9c84e446254b552c3
@furszy
Optimize ActivateBestChain for long chains
34a2b62 
Coming from upstream@fb8fad1586ced69fa37c665a11916ae4c4d0df05
@furszy
Notify reindexing progress to the GUI.
042bf22
@furszy
GUI: notifyTip header text.
363f2bb
@furszy
Reindex: Reset reindex flag once the whole chain is finally connected
fd7478d
@furszy furszy self-assigned this Feb 14, 2020
@random-zebra random-zebra modified the milestones: Future, 5.0.0 Apr 20, 2020
@furszy furszy modified the milestones: 4.2.0, 5.0.0 Jun 29, 2020
@random-zebra random-zebra mentioned this pull request Sep 23, 2020
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furszy commented Oct 14, 2020

Closing this PR for now, some of the commits were already merged in other PRs and the reindex re work needs more time.

@furszy furszy closed this Oct 14, 2020
@Fuzzbawls Fuzzbawls removed this from the 5.0.0 milestone Dec 4, 2020
@furszy furszy deleted the 2020_optimized_reindex branch November 29, 2022 14:25
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@furszy @Fuzzbawls @random-zebra