core, ethdb, trie: mode dirty data to clean cache on flush#19307
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fjl merged 5 commits intoethereum:masterfrom Mar 26, 2019
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core, ethdb, trie: mode dirty data to clean cache on flush#19307fjl merged 5 commits intoethereum:masterfrom
fjl merged 5 commits intoethereum:masterfrom
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karalabe
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This was referenced Mar 25, 2019
holiman
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Yes, this is a cluster-f*ck. That said, the trie database write access is serialized by the blockchain importer, since we can't import two blocks concurrently. The only thing this code needs to ensure is that API CALL operations, sync state retrievals, etc don't mess up. The blockchain guarantees that no write will intervene here.
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As per our long discussion on Discord, please remove read locking from Commit and Cap. Please also document that Commit and Cap are not safe for concurrent use.
fjl
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This PR is a more advanced form of the dirty-to-clean cacher (#18995), where we reuse previous database write batches as datasets to uncache, saving a dirty-trie-iteration and a dirty-trie-rlp-reencoding per block.