Support for big ledger peer snapshot #5787
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carbolymer
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Apr 18, 2024
cardano-node/src/Cardano/Node/Run.hs
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| (\io_m_lps -> do | ||
| m_lps <- io_m_lps |
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I though io_m_lps was a little clearer than ioMLps, or do you have something else in mind?
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Having to prefix the variables with the types is usually a sign that you're working against the language. Here it is because you're trying to shoehorn your function into MaybeT which doesn't work here very well and forces you to work with variables with type IO (Maybe a) outside of MaybeT. Why not write this function like this:
updateLedgerPeerSnapshot :: Tracer IO (StartupTrace blk)
-> STM IO (Maybe PeerSnapshotFile)
-> (Maybe LedgerPeerSnapshot -> STM IO ())
-> IO (Maybe LedgerPeerSnapshot)
updateLedgerPeerSnapshot startupTracer readLedgerPeerPath writeVar = do
mPeerSnapshotFile <- atomically readLedgerPeerPath
mLedgerPeerSnapshot <- forM mPeerSnapshotFile $ \f -> do
lps@(LedgerPeerSnapshot (wOrigin, _)) <- readPeerSnapshotFile f
lps <$ traceWith startupTracer (LedgerPeerSnapshotLoaded wOrigin)
atomically . writeVar $ mLedgerPeerSnapshot
pure mLedgerPeerSnapshotThere was a problem hiding this comment.
Yes, that's most intuitive.
carbolymer
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Apr 18, 2024
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Maybe I don't have to bump the protocol version at all in this patch based on review comment in related PR on consensus side |
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This PR is stale because it has been open 45 days with no activity. |
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Missing updating Node Configuration parser to read genesis targets and ledger snapshot.
This change introduces support for big ledger peers in the node. A new optional entry in network topology JSON parser is added that is intended to point to a path containing a serialized snapshot of big ledger peers taken from some slot a priori. When present, this file is decoded at node startup, or when a SIGHUP is triggered, and made available to the diffusion layer via reading from a TVar.
The ConsensusMode configuration option determines whether support for Genesis syncing is enabled. If this flag is GenesisMode, alternate targets for active peers (non- big ledger) and all big ledger targets is used by the peer selection and churn governors in the diffusion layer. These targets are in effect when ledger state is deemed `TooOld` by consensus layer. The large active big ledger peer targets crucially depend on chain skipping to maintain performance requirements. Otherwise, in PraosMode, the legacy algorithm with a single set of targets is employed.
…owicz/genesis-ledger-peer-snapshot
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Description
This change introduces support for big ledger peers in the node. A new optional entry in network topology JSON parser is added that is intended to point to a path containing a serialized snapshot of big ledger peers taken from some slot a priori. When present, this file is decoded at node startup, or when a SIGHUP is triggered, and made available to the diffusion layer via reading from a TVar.
Checklist
See Runnings tests for more details
CHANGELOG.mdfor affected package.cabalfiles are updatedhlint. See.github/workflows/check-hlint.ymlto get thehlintversionstylish-haskell. See.github/workflows/stylish-haskell.ymlto get thestylish-haskellversionghc-8.10.7andghc-9.2.7Note on CI
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