add lmdb backend
This commit is contained in:
parent
3b5562d85b
commit
5fc134ac2a
|
@ -0,0 +1,160 @@
|
|||
import os, ranges, eth_trie/[defs, db_tracing]
|
||||
import ../storage_types
|
||||
|
||||
when defined(windows):
|
||||
const Lib = "lmdb.dll"
|
||||
elif defined(macos):
|
||||
const Lib = "liblmdb.dylib"
|
||||
else:
|
||||
const Lib = "liblmdb.so"
|
||||
|
||||
const
|
||||
MDB_NOSUBDIR = 0x4000
|
||||
MDB_NOTFOUND = -30798
|
||||
LMDB_MAP_SIZE = 1024 * 1024 * 1024 * 10 # 10TB enough?
|
||||
|
||||
type
|
||||
MDB_Env = distinct pointer
|
||||
MDB_Txn = distinct pointer
|
||||
MDB_Dbi = distinct cuint
|
||||
|
||||
MDB_val = object
|
||||
mv_size: csize
|
||||
mv_data: pointer
|
||||
|
||||
# this is only a subset of LMDB API needed in nimbus
|
||||
proc mdb_env_create(env: var MDB_Env): cint {.cdecl, dynlib: Lib, importc: "mdb_env_create".}
|
||||
proc mdb_env_open(env: MDB_Env, path: cstring, flags: cuint, mode: cint): cint {.cdecl, dynlib: Lib, importc: "mdb_env_open".}
|
||||
proc mdb_txn_begin(env: MDB_Env, parent: MDB_Txn, flags: cuint, txn: var MDB_Txn): cint {.cdecl, dynlib: Lib, importc: "mdb_txn_begin".}
|
||||
proc mdb_txn_commit(txn: MDB_Txn): cint {.cdecl, dynlib: Lib, importc: "mdb_txn_commit".}
|
||||
proc mdb_dbi_open(txn: MDB_Txn, name: cstring, flags: cuint, dbi: var MDB_Dbi): cint {.cdecl, dynlib: Lib, importc: "mdb_dbi_open".}
|
||||
proc mdb_dbi_close(env: MDB_Env, dbi: MDB_Dbi) {.cdecl, dynlib: Lib, importc: "mdb_dbi_close".}
|
||||
proc mdb_env_close(env: MDB_Env) {.cdecl, dynlib: Lib, importc: "mdb_env_close".}
|
||||
|
||||
proc mdb_get(txn: MDB_Txn, dbi: MDB_Dbi, key: var MDB_val, data: var MDB_val): cint {.cdecl, dynlib: Lib, importc: "mdb_get".}
|
||||
proc mdb_del(txn: MDB_Txn, dbi: MDB_Dbi, key: var MDB_val, data: ptr MDB_val): cint {.cdecl, dynlib: Lib, importc: "mdb_del".}
|
||||
proc mdb_put(txn: MDB_Txn, dbi: MDB_Dbi, key: var MDB_val, data: var MDB_val, flags: cuint): cint {.cdecl, dynlib: Lib, importc: "mdb_put".}
|
||||
|
||||
proc mdb_env_set_mapsize(env: MDB_Env, size: uint64): cint {.cdecl, dynlib: Lib, importc: "mdb_env_set_mapsize".}
|
||||
|
||||
type
|
||||
LmdbChainDB* = ref object of RootObj
|
||||
env: MDB_Env
|
||||
txn: MDB_Txn
|
||||
dbi: MDB_Dbi
|
||||
manualCommit: bool
|
||||
|
||||
ChainDB* = LmdbChainDB
|
||||
|
||||
# call txBegin and txCommit if you want to disable auto-commit
|
||||
proc txBegin*(db: ChainDB, manualCommit = true): bool =
|
||||
result = true
|
||||
if manualCommit:
|
||||
db.manualCommit = true
|
||||
else:
|
||||
if db.manualCommit: return
|
||||
result = mdb_txn_begin(db.env, MDB_Txn(nil), 0, db.txn) == 0
|
||||
result = result and mdb_dbi_open(db.txn, nil, 0, db.dbi) == 0
|
||||
|
||||
proc txCommit*(db: ChainDB, manualCommit = true): bool =
|
||||
result = true
|
||||
if manualCommit:
|
||||
db.manualCommit = false
|
||||
else:
|
||||
if db.manualCommit: return
|
||||
result = mdb_txn_commit(db.txn) == 0
|
||||
mdb_dbi_close(db.env, db.dbi)
|
||||
|
||||
proc toMdbVal(val: openArray[byte]): MDB_Val =
|
||||
result.mv_size = val.len
|
||||
result.mv_data = unsafeAddr val[0]
|
||||
|
||||
proc get*(db: ChainDB, key: openarray[byte]): seq[byte] =
|
||||
if key.len == 0: return
|
||||
var
|
||||
dbKey = toMdbVal(key)
|
||||
dbVal: MDB_val
|
||||
|
||||
if not db.txBegin(false):
|
||||
raiseKeyReadError(key)
|
||||
|
||||
var errCode = mdb_get(db.txn, db.dbi, dbKey, dbVal)
|
||||
|
||||
if not(errCode == 0 or errCode == MDB_NOTFOUND):
|
||||
raiseKeyReadError(key)
|
||||
|
||||
if dbVal.mv_size > 0 and errCode == 0:
|
||||
result = newSeq[byte](dbVal.mv_size.int)
|
||||
copyMem(result[0].addr, dbVal.mv_data, result.len)
|
||||
else:
|
||||
result = @[]
|
||||
|
||||
traceGet key, result
|
||||
if not db.txCommit(false):
|
||||
raiseKeyReadError(key)
|
||||
|
||||
proc put*(db: ChainDB, key, value: openarray[byte]) =
|
||||
tracePut key, value
|
||||
if key.len == 0 or value.len == 0: return
|
||||
var
|
||||
dbKey = toMdbVal(key)
|
||||
dbVal = toMdbVal(value)
|
||||
|
||||
if not db.txBegin(false):
|
||||
raiseKeyWriteError(key)
|
||||
|
||||
var ok = mdb_put(db.txn, db.dbi, dbKey, dbVal, 0) == 0
|
||||
if not ok:
|
||||
raiseKeyWriteError(key)
|
||||
|
||||
if not db.txCommit(false):
|
||||
raiseKeyWriteError(key)
|
||||
|
||||
proc contains*(db: ChainDB, key: openarray[byte]): bool =
|
||||
if key.len == 0: return
|
||||
var
|
||||
dbKey = toMdbVal(key)
|
||||
dbVal: MDB_val
|
||||
|
||||
if not db.txBegin(false):
|
||||
raiseKeySearchError(key)
|
||||
|
||||
result = mdb_get(db.txn, db.dbi, dbKey, dbVal) == 0
|
||||
|
||||
if not db.txCommit(false):
|
||||
raiseKeySearchError(key)
|
||||
|
||||
proc del*(db: ChainDB, key: openarray[byte]) =
|
||||
traceDel key
|
||||
if key.len == 0: return
|
||||
var
|
||||
dbKey = toMdbVal(key)
|
||||
|
||||
if not db.txBegin(false):
|
||||
raiseKeyDeletionError(key)
|
||||
|
||||
var errCode = mdb_del(db.txn, db.dbi, dbKey, nil)
|
||||
if not(errCode == 0 or errCode == MDB_NOTFOUND):
|
||||
raiseKeyDeletionError(key)
|
||||
|
||||
if not db.txCommit(false):
|
||||
raiseKeyDeletionError(key)
|
||||
|
||||
proc close*(db: ChainDB) =
|
||||
mdb_env_close(db.env)
|
||||
|
||||
proc newChainDB*(basePath: string): ChainDB =
|
||||
result.new()
|
||||
|
||||
let dataDir = basePath / "nimbus.db"
|
||||
var ok = mdb_env_create(result.env) == 0
|
||||
if not ok: raiseStorageInitError()
|
||||
|
||||
ok = mdb_env_set_mapsize(result.env, LMDB_MAP_SIZE) == 0
|
||||
if not ok: raiseStorageInitError()
|
||||
|
||||
# file mode ignored on windows
|
||||
ok = mdb_env_open(result.env, dataDir, MDB_NOSUBDIR, 0o664) == 0
|
||||
if not ok: raiseStorageInitError()
|
||||
|
||||
result.put(emptyRlpHash.data, emptyRlp)
|
|
@ -3,11 +3,11 @@ import
|
|||
eth_trie/[db], ../nimbus/db/[db_chain, capturedb],
|
||||
../nimbus/[tracer, vm_types, config]
|
||||
|
||||
const backEnd {.strdefine.} = "lmdb"
|
||||
const nimbus_db_backend {.strdefine.} = "rocksdb"
|
||||
|
||||
when backEnd == "sqlite":
|
||||
when nimbus_db_backend == "sqlite":
|
||||
import ../nimbus/db/backends/sqlite_backend
|
||||
elif backEnd == "rocksdb":
|
||||
elif nimbus_db_backend == "rocksdb":
|
||||
import ../nimbus/db/backends/rocksdb_backend
|
||||
else:
|
||||
import ../nimbus/db/backends/lmdb_backend
|
||||
|
|
Loading…
Reference in New Issue