go/storage: Refactor checkpointing interface #2659
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@@ Coverage Diff @@
## master #2659 +/- ##
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- Coverage 63.15% 62.95% -0.2%
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Files 370 376 +6
Lines 34910 35314 +404
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+ Hits 22046 22231 +185
- Misses 10111 10306 +195
- Partials 2753 2777 +24
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Previously the way storage checkpoints were implemented had several drawbacks, namely: - Since the checkpoint only streamed key/value pairs this prevented correct tree reconstruction as tree nodes also include a Round field which specifies the round at which a given tree node was created. - While old checkpoints were streamed in chunks and thus could be resumed or streamed in parallel from multiple nodes, there was no support for verifying the integrity of a single chunk. This change introduces an explicit checkpointing mechanism with a simple file-based backend reference implementation. The same mechanism could also be used in the future with Tendermint's app state sync proposal.
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Part of #2479
Previously the way storage checkpoints were implemented had several
drawbacks, namely:
Since the checkpoint only streamed key/value pairs this prevented
correct tree reconstruction as tree nodes also include a Round field
which specifies the round at which a given tree node was created.
While old checkpoints were streamed in chunks and thus could be
resumed or streamed in parallel from multiple nodes, there was no
support for verifying the integrity of a single chunk.
This change introduces an explicit checkpointing mechanism with a simple
file-based backend reference implementation. The same mechanism could
also be used in the future with Tendermint's app state sync proposal.
NOTE: This adds support for generating checkpoints but not for syncing them.