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validation: pruning for multiple chainstates

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Introduces ChainstateManager::GetPruneRange().

The prune budget is split evenly between the number of chainstates,
however the prune budget may be exceeded if the resulting shares are
beneath `MIN_DISK_SPACE_FOR_BLOCK_FILES`.
This commit is contained in:
James O'Beirne
2019-09-16 16:34:45 -04:00
committed by James O'Beirne
parent 373cf91531
commit 1019c39982
5 changed files with 102 additions and 30 deletions
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doc/release-notes-27596.md Normal file
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Pruning
-------
When using assumeutxo with `-prune`, the prune budget may be exceeded if it is set
lower than 1100MB (i.e. `MIN_DISK_SPACE_FOR_BLOCK_FILES * 2`). Prune budget is normally
split evenly across each chainstate, unless the resulting prune budget per chainstate
is beneath `MIN_DISK_SPACE_FOR_BLOCK_FILES` in which case that value will be used.