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54f784bef1
* Aristo: Generalise alien/guest interface for piggiback on database * Aristo: Code cosmetics * CoreDb+Kvt: Update transaction API why: Use single addressable function `forkTx(backLevel: int)` as used in `Aristo`. So `Kvt` can be synced simultaneously to `Aristo`. also: Refactored `kvt_tx.nim` in a similar fashion to `Aristo`. * Kvt: Replace `LayerDelta` object by reference why: Will be needed when introducing filters * Kvt: Remodel backend filter facility similar to `Aristo` why: This allows to operate on several KVT instances simultaneously. * CoreDb+Kvt: Fix on-disk storage why: Overlooked name change: `stow()` => `persist()` for permanent storage * Fix copyright headers
74 lines
2.5 KiB
Nim
74 lines
2.5 KiB
Nim
# nimbus-eth1
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# Copyright (c) 2023-2024 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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## Rocks DB internal driver descriptor
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## ===================================
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{.push raises: [].}
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import
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std/os,
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eth/common,
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rocksdb,
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stew/[endians2, keyed_queue],
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../../aristo_desc,
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../init_common
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type
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RdbInst* = object
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store*: ColFamilyReadWrite ## Rocks DB database handler
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session*: WriteBatchRef ## For batched `put()`
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rdKeyLru*: KeyedQueue[RdbKey,Blob] ## Read cache
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rdVtxLru*: KeyedQueue[RdbKey,Blob] ## Read cache
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basePath*: string ## Database directory
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noFq*: bool ## No filter queues available
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RdbKey* = array[1 + sizeof VertexID, byte]
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## Sub-table key, <pfx> + VertexID
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# Alien interface
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RdbGuest* = enum
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GuestFamily0 = "Guest0" ## Guest family (e.g. for Kvt)
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GuestFamily1 = "Guest1" ## Ditto
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GuestFamily2 = "Guest2" ## Ditto
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RdbGuestDbRef* = ref object of GuestDbRef
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guestDb*: ColFamilyReadWrite ## Pigiback feature references
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const
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AristoFamily* = "Aristo" ## RocksDB column family
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BaseFolder* = "nimbus" ## Same as for Legacy DB
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DataFolder* = "aristo" ## Legacy DB has "data"
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RdKeyLruMaxSize* = 4096 ## Max size of read cache for keys
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RdVtxLruMaxSize* = 2048 ## Max size of read cache for vertex IDs
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# ------------------------------------------------------------------------------
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# Public functions
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# ------------------------------------------------------------------------------
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template logTxt*(info: static[string]): static[string] =
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"RocksDB/" & info
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func baseDir*(rdb: RdbInst): string =
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rdb.basePath / BaseFolder
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func dataDir*(rdb: RdbInst): string =
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rdb.baseDir / DataFolder
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func toRdbKey*(id: uint64; pfx: StorageType): RdbKey =
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let idKey = id.toBytesBE
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result[0] = pfx.ord.byte
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copyMem(addr result[1], unsafeAddr idKey, sizeof idKey)
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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