github.com/theQRL/go-zond@v0.1.1/core/rawdb/ancient_scheme.go (about)

     1  // Copyright 2022 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package rawdb
    18  
    19  import "path/filepath"
    20  
    21  // The list of table names of chain freezer.
    22  const (
    23  	// ChainFreezerHeaderTable indicates the name of the freezer header table.
    24  	ChainFreezerHeaderTable = "headers"
    25  
    26  	// ChainFreezerHashTable indicates the name of the freezer canonical hash table.
    27  	ChainFreezerHashTable = "hashes"
    28  
    29  	// ChainFreezerBodiesTable indicates the name of the freezer block body table.
    30  	ChainFreezerBodiesTable = "bodies"
    31  
    32  	// ChainFreezerReceiptTable indicates the name of the freezer receipts table.
    33  	ChainFreezerReceiptTable = "receipts"
    34  
    35  	// ChainFreezerDifficultyTable indicates the name of the freezer total difficulty table.
    36  	ChainFreezerDifficultyTable = "diffs"
    37  )
    38  
    39  // chainFreezerNoSnappy configures whether compression is disabled for the ancient-tables.
    40  // Hashes and difficulties don't compress well.
    41  var chainFreezerNoSnappy = map[string]bool{
    42  	ChainFreezerHeaderTable:     false,
    43  	ChainFreezerHashTable:       true,
    44  	ChainFreezerBodiesTable:     false,
    45  	ChainFreezerReceiptTable:    false,
    46  	ChainFreezerDifficultyTable: true,
    47  }
    48  
    49  const (
    50  	// stateHistoryTableSize defines the maximum size of freezer data files.
    51  	stateHistoryTableSize = 2 * 1000 * 1000 * 1000
    52  
    53  	// stateHistoryAccountIndex indicates the name of the freezer state history table.
    54  	stateHistoryMeta         = "history.meta"
    55  	stateHistoryAccountIndex = "account.index"
    56  	stateHistoryStorageIndex = "storage.index"
    57  	stateHistoryAccountData  = "account.data"
    58  	stateHistoryStorageData  = "storage.data"
    59  )
    60  
    61  var stateFreezerNoSnappy = map[string]bool{
    62  	stateHistoryMeta:         true,
    63  	stateHistoryAccountIndex: false,
    64  	stateHistoryStorageIndex: false,
    65  	stateHistoryAccountData:  false,
    66  	stateHistoryStorageData:  false,
    67  }
    68  
    69  // The list of identifiers of ancient stores.
    70  var (
    71  	chainFreezerName = "chain" // the folder name of chain segment ancient store.
    72  	stateFreezerName = "state" // the folder name of reverse diff ancient store.
    73  )
    74  
    75  // freezers the collections of all builtin freezers.
    76  var freezers = []string{chainFreezerName, stateFreezerName}
    77  
    78  // NewStateFreezer initializes the freezer for state history.
    79  func NewStateFreezer(ancientDir string, readOnly bool) (*ResettableFreezer, error) {
    80  	return NewResettableFreezer(filepath.Join(ancientDir, stateFreezerName), "eth/db/state", readOnly, stateHistoryTableSize, stateFreezerNoSnappy)
    81  }