168 lines
6.4 KiB
Nim
168 lines
6.4 KiB
Nim
# Nimbus
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# Copyright (c) 2021 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed
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# except according to those terms.
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{.push raises: [Defect].}
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const
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pivotTableLruEntriesMax* = 50
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## Max depth of pivot table. On overflow, the oldest one will be removed.
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pivotBlockDistanceMin* = 128
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## The minimal depth of two block headers needed to activate a new state
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## root pivot.
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##
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## Effects on assembling the state via `snap/1` protocol:
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##
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## * A small value of this constant increases the propensity to update the
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## pivot header more often. This is so because each new peer negoiates a
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## pivot block number at least the current one.
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##
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## * A large value keeps the current pivot more stable but some experiments
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## suggest that the `snap/1` protocol is answered only for later block
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## numbers (aka pivot blocks.) So a large value tends to keep the pivot
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## farther away from the chain head.
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##
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## Note that 128 is the magic distance for snapshots used by *Geth*.
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pivotBlockDistanceThrottledPivotChangeMin* = 256
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## Slower pivot change while healing or nearly complete accounts database
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## takes place.
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pivotEnvStopChangingIfComplete* = true
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## If set `true`, new peers will not change the pivot even if the
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## negotiated pivot would be newer. This should be the default.
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# --------------
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fetchRequestBytesLimit* = 2 * 1024 * 1024
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## Soft bytes limit to request in `snap/1` protocol calls.
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fetchRequestTrieNodesMax* = 1024
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## Informal maximal number of trie nodes to fetch at once in `snap/1`
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## protocol calls. This is not an official limit but found with several
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## implementations (e.g. Geth.)
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##
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## Resticting the fetch list length early allows to better parallelise
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## healing.
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fetchRequestStorageSlotsMax* = 2 * 1024
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## Maximal number of storage tries to fetch with a single request message.
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# --------------
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accountsSaveProcessedChunksMax* = 1000
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## Recovery data are stored if the processed ranges list contains no more
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## than this many range *chunks*.
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##
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## If the range set is too much fragmented, no data will be saved and
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## restart has to perform from scratch or an earlier checkpoint.
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accountsSaveStorageSlotsMax* = 20_000
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## Recovery data are stored if the oustanding storage slots to process do
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## not amount to more than this many entries.
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##
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## If there are too many dangling nodes, no data will be saved and restart
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## has to perform from scratch or an earlier checkpoint.
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storageSlotsTrieInheritPerusalMax* = 30_000
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## Maximal number of nodes to visit in order to find out whether this
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## storage slots trie is complete. This allows to *inherit* the full trie
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## for an existing root node if the trie is small enough.
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storageSlotsQuPrioThresh* = 5_000
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## For a new worker, prioritise processing the storage slots queue over
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## processing accounts if the queue has more than this many items.
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##
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## For a running worker processing accounts, stop processing accounts
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## and switch to processing the storage slots queue if the queue has
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## more than this many items.
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# --------------
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healAccountsCoverageTrigger* = 1.01
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## Apply accounts healing if the global snap download coverage factor
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## exceeds this setting. The global coverage factor is derived by merging
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## all account ranges retrieved for all pivot state roots (see
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## `coveredAccounts` in the object `CtxData`.) Note that a coverage factor
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## greater than 100% is not exact but rather a lower bound estimate.
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healAccountsInspectionPlanBLevel* = 4
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## Search this level deep for missing nodes if `hexaryEnvelopeDecompose()`
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## only produces existing nodes.
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##
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## The maximal number of nodes visited at level 3 is *4KiB* and at level 4
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## is *64Kib*.
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healAccountsBatchMax* = 10 * 1024
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## Keep on gloing in healing task up until this many nodes have been
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## fetched from the network or some error contition terminates the task.
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##
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## This constant should be larger than `fetchRequestStorageSlotsMax`
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healSlorageSlotsTrigger* = 0.70
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## Consider per account storage slost healing if a per-account hexary
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## sub-trie has reached this factor of completeness.
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healStorageSlotsInspectionPlanBLevel* = 4
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## Similar to `healAccountsInspectionPlanBLevel`
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healStorageSlotsBatchMax* = 32
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## Maximal number of storage tries to to heal in a single batch run. Only
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## this many items will be removed from the batch queue. These items will
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## then be processed one by one.
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# --------------
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comErrorsTimeoutMax* = 3
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## Maximal number of non-resonses accepted in a row. If there are more than
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## `comErrorsTimeoutMax` consecutive errors, the worker will be degraded
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## as zombie.
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comErrorsTimeoutSleepMSecs* = 5000
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## Wait/suspend for this many seconds after a timeout error if there are
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## not more than `comErrorsTimeoutMax` errors in a row (maybe some other
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## network or no-data errors mixed in.) Set 0 to disable.
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comErrorsNetworkMax* = 5
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## Similar to `comErrorsTimeoutMax` but for network errors.
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comErrorsNetworkSleepMSecs* = 5000
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## Similar to `comErrorsTimeoutSleepSecs` but for network errors.
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## Set 0 to disable.
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comErrorsNoDataMax* = 3
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## Similar to `comErrorsTimeoutMax` but for missing data errors.
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comErrorsNoDataSleepMSecs* = 0
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## Similar to `comErrorsTimeoutSleepSecs` but for missing data errors.
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## Set 0 to disable.
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static:
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doAssert storageSlotsQuPrioThresh < accountsSaveStorageSlotsMax
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doAssert fetchRequestTrieNodesMax < healAccountsBatchMax
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# Deprecated, to be expired
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const
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healInspectionBatch* = 10_000
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## Number of nodes to inspect in a single batch. In between batches, a
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## task/thread switch is allowed.
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healInspectionBatchWaitNanoSecs* = 500
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## Wait some time asynchroneously after processing `healInspectionBatch`
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## nodes to allow for a pseudo -task switch.
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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