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// Copyright (c) 2014-2020, The Monero Project
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//
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// permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
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//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
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# pragma once
# include <boost/program_options/variables_map.hpp>
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# include "cryptonote_basic/cryptonote_basic_impl.h"
# include "cryptonote_basic/verification_context.h"
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# include "cryptonote_core/i_core_events.h"
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# include <unordered_map>
namespace tests
{
struct block_index {
size_t height ;
crypto : : hash id ;
crypto : : hash longhash ;
cryptonote : : block blk ;
cryptonote : : blobdata blob ;
std : : list < cryptonote : : transaction > txes ;
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block_index ( ) : height ( 0 ) , id ( crypto : : null_hash ) , longhash ( crypto : : null_hash ) { }
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block_index ( size_t _height , const crypto : : hash & _id , const crypto : : hash & _longhash , const cryptonote : : block & _blk , const cryptonote : : blobdata & _blob , const std : : list < cryptonote : : transaction > & _txes )
: height ( _height ) , id ( _id ) , longhash ( _longhash ) , blk ( _blk ) , blob ( _blob ) , txes ( _txes ) { }
} ;
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class proxy_core : public cryptonote : : i_core_events
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{
cryptonote : : block m_genesis ;
std : : list < crypto : : hash > m_known_block_list ;
std : : unordered_map < crypto : : hash , block_index > m_hash2blkidx ;
crypto : : hash m_lastblk ;
std : : list < cryptonote : : transaction > txes ;
bool add_block ( const crypto : : hash & _id , const crypto : : hash & _longhash , const cryptonote : : block & _blk , const cryptonote : : blobdata & _blob ) ;
void build_short_history ( std : : list < crypto : : hash > & m_history , const crypto : : hash & m_start ) ;
public :
void on_synchronized ( ) { }
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void safesyncmode ( const bool ) { }
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uint64_t get_current_blockchain_height ( ) { return 1 ; }
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void set_target_blockchain_height ( uint64_t ) { }
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bool init ( const boost : : program_options : : variables_map & vm ) ;
bool deinit ( ) { return true ; }
bool get_short_chain_history ( std : : list < crypto : : hash > & ids ) ;
bool have_block ( const crypto : : hash & id ) ;
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void get_blockchain_top ( uint64_t & height , crypto : : hash & top_id ) ;
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bool handle_incoming_tx ( const cryptonote : : tx_blob_entry & tx_blob , cryptonote : : tx_verification_context & tvc , cryptonote : : relay_method tx_relay , bool relayed ) ;
bool handle_incoming_txs ( const std : : vector < cryptonote : : tx_blob_entry > & tx_blobs , std : : vector < cryptonote : : tx_verification_context > & tvc , cryptonote : : relay_method tx_relay , bool relayed ) ;
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bool handle_incoming_block ( const cryptonote : : blobdata & block_blob , const cryptonote : : block * block , cryptonote : : block_verification_context & bvc , bool update_miner_blocktemplate = true ) ;
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void pause_mine ( ) { }
void resume_mine ( ) { }
bool on_idle ( ) { return true ; }
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bool find_blockchain_supplement ( const std : : list < crypto : : hash > & qblock_ids , bool clip_pruned , cryptonote : : NOTIFY_RESPONSE_CHAIN_ENTRY : : request & resp ) { return true ; }
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bool handle_get_objects ( cryptonote : : NOTIFY_REQUEST_GET_OBJECTS : : request & arg , cryptonote : : NOTIFY_RESPONSE_GET_OBJECTS : : request & rsp , cryptonote : : cryptonote_connection_context & context ) { return true ; }
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cryptonote : : Blockchain & get_blockchain_storage ( ) { throw std : : runtime_error ( " Called invalid member function: please never call get_blockchain_storage on the TESTING class proxy_core. " ) ; }
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bool get_test_drop_download ( ) { return true ; }
bool get_test_drop_download_height ( ) { return true ; }
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bool prepare_handle_incoming_blocks ( const std : : vector < cryptonote : : block_complete_entry > & blocks_entry , std : : vector < cryptonote : : block > & blocks ) { return true ; }
** CHANGES ARE EXPERIMENTAL (FOR TESTING ONLY)
Bockchain:
1. Optim: Multi-thread long-hash computation when encountering groups of blocks.
2. Optim: Cache verified txs and return result from cache instead of re-checking whenever possible.
3. Optim: Preload output-keys when encoutering groups of blocks. Sort by amount and global-index before bulk querying database and multi-thread when possible.
4. Optim: Disable double spend check on block verification, double spend is already detected when trying to add blocks.
5. Optim: Multi-thread signature computation whenever possible.
6. Patch: Disable locking (recursive mutex) on called functions from check_tx_inputs which causes slowdowns (only seems to happen on ubuntu/VMs??? Reason: TBD)
7. Optim: Removed looped full-tx hash computation when retrieving transactions from pool (???).
8. Optim: Cache difficulty/timestamps (735 blocks) for next-difficulty calculations so that only 2 db reads per new block is needed when a new block arrives (instead of 1470 reads).
Berkeley-DB:
1. Fix: 32-bit data errors causing wrong output global indices and failure to send blocks to peers (etc).
2. Fix: Unable to pop blocks on reorganize due to transaction errors.
3. Patch: Large number of transaction aborts when running multi-threaded bulk queries.
4. Patch: Insufficient locks error when running full sync.
5. Patch: Incorrect db stats when returning from an immediate exit from "pop block" operation.
6. Optim: Add bulk queries to get output global indices.
7. Optim: Modified output_keys table to store public_key+unlock_time+height for single transaction lookup (vs 3)
8. Optim: Used output_keys table retrieve public_keys instead of going through output_amounts->output_txs+output_indices->txs->output:public_key
9. Optim: Added thread-safe buffers used when multi-threading bulk queries.
10. Optim: Added support for nosync/write_nosync options for improved performance (*see --db-sync-mode option for details)
11. Mod: Added checkpoint thread and auto-remove-logs option.
12. *Now usable on 32-bit systems like RPI2.
LMDB:
1. Optim: Added custom comparison for 256-bit key tables (minor speed-up, TBD: get actual effect)
2. Optim: Modified output_keys table to store public_key+unlock_time+height for single transaction lookup (vs 3)
3. Optim: Used output_keys table retrieve public_keys instead of going through output_amounts->output_txs+output_indices->txs->output:public_key
4. Optim: Added support for sync/writemap options for improved performance (*see --db-sync-mode option for details)
5. Mod: Auto resize to +1GB instead of multiplier x1.5
ETC:
1. Minor optimizations for slow-hash for ARM (RPI2). Incomplete.
2. Fix: 32-bit saturation bug when computing next difficulty on large blocks.
[PENDING ISSUES]
1. Berkely db has a very slow "pop-block" operation. This is very noticeable on the RPI2 as it sometimes takes > 10 MINUTES to pop a block during reorganization.
This does not happen very often however, most reorgs seem to take a few seconds but it possibly depends on the number of outputs present. TBD.
2. Berkeley db, possible bug "unable to allocate memory". TBD.
[NEW OPTIONS] (*Currently all enabled for testing purposes)
1. --fast-block-sync arg=[0:1] (default: 1)
a. 0 = Compute long hash per block (may take a while depending on CPU)
b. 1 = Skip long-hash and verify blocks based on embedded known good block hashes (faster, minimal CPU dependence)
2. --db-sync-mode arg=[[safe|fast|fastest]:[sync|async]:[nblocks_per_sync]] (default: fastest:async:1000)
a. safe = fdatasync/fsync (or equivalent) per stored block. Very slow, but safest option to protect against power-out/crash conditions.
b. fast/fastest = Enables asynchronous fdatasync/fsync (or equivalent). Useful for battery operated devices or STABLE systems with UPS and/or systems with battery backed write cache/solid state cache.
Fast - Write meta-data but defer data flush.
Fastest - Defer meta-data and data flush.
Sync - Flush data after nblocks_per_sync and wait.
Async - Flush data after nblocks_per_sync but do not wait for the operation to finish.
3. --prep-blocks-threads arg=[n] (default: 4 or system max threads, whichever is lower)
Max number of threads to use when computing long-hash in groups.
4. --show-time-stats arg=[0:1] (default: 1)
Show benchmark related time stats.
5. --db-auto-remove-logs arg=[0:1] (default: 1)
For berkeley-db only. Auto remove logs if enabled.
**Note: lmdb and berkeley-db have changes to the tables and are not compatible with official git head version.
At the moment, you need a full resync to use this optimized version.
[PERFORMANCE COMPARISON]
**Some figures are approximations only.
Using a baseline machine of an i7-2600K+SSD+(with full pow computation):
1. The optimized lmdb/blockhain core can process blocks up to 585K for ~1.25 hours + download time, so it usually takes 2.5 hours to sync the full chain.
2. The current head with memory can process blocks up to 585K for ~4.2 hours + download time, so it usually takes 5.5 hours to sync the full chain.
3. The current head with lmdb can process blocks up to 585K for ~32 hours + download time and usually takes 36 hours to sync the full chain.
Averate procesing times (with full pow computation):
lmdb-optimized:
1. tx_ave = 2.5 ms / tx
2. block_ave = 5.87 ms / block
memory-official-repo:
1. tx_ave = 8.85 ms / tx
2. block_ave = 19.68 ms / block
lmdb-official-repo (0f4a036437fd41a5498ee5e74e2422ea6177aa3e)
1. tx_ave = 47.8 ms / tx
2. block_ave = 64.2 ms / block
**Note: The following data denotes processing times only (does not include p2p download time)
lmdb-optimized processing times (with full pow computation):
1. Desktop, Quad-core / 8-threads 2600k (8Mb) - 1.25 hours processing time (--db-sync-mode=fastest:async:1000).
2. Laptop, Dual-core / 4-threads U4200 (3Mb) - 4.90 hours processing time (--db-sync-mode=fastest:async:1000).
3. Embedded, Quad-core / 4-threads Z3735F (2x1Mb) - 12.0 hours processing time (--db-sync-mode=fastest:async:1000).
lmdb-optimized processing times (with per-block-checkpoint)
1. Desktop, Quad-core / 8-threads 2600k (8Mb) - 10 minutes processing time (--db-sync-mode=fastest:async:1000).
berkeley-db optimized processing times (with full pow computation)
1. Desktop, Quad-core / 8-threads 2600k (8Mb) - 1.8 hours processing time (--db-sync-mode=fastest:async:1000).
2. RPI2. Improved from estimated 3 months(???) into 2.5 days (*Need 2AMP supply + Clock:1Ghz + [usb+ssd] to achieve this speed) (--db-sync-mode=fastest:async:1000).
berkeley-db optimized processing times (with per-block-checkpoint)
1. RPI2. 12-15 hours (*Need 2AMP supply + Clock:1Ghz + [usb+ssd] to achieve this speed) (--db-sync-mode=fastest:async:1000).
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bool cleanup_handle_incoming_blocks ( bool force_sync = false ) { return true ; }
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uint64_t get_target_blockchain_height ( ) const { return 1 ; }
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size_t get_block_sync_size ( uint64_t height ) const { return BLOCKS_SYNCHRONIZING_DEFAULT_COUNT ; }
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virtual void on_transactions_relayed ( epee : : span < const cryptonote : : blobdata > tx_blobs , cryptonote : : relay_method tx_relay ) { }
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cryptonote : : network_type get_nettype ( ) const { return cryptonote : : MAINNET ; }
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bool get_pool_transaction ( const crypto : : hash & id , cryptonote : : blobdata & tx_blob , cryptonote : : relay_category tx_category ) const { return false ; }
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bool pool_has_tx ( const crypto : : hash & txid ) const { return false ; }
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bool get_blocks ( uint64_t start_offset , size_t count , std : : vector < std : : pair < cryptonote : : blobdata , cryptonote : : block > > & blocks , std : : vector < cryptonote : : blobdata > & txs ) const { return false ; }
bool get_transactions ( const std : : vector < crypto : : hash > & txs_ids , std : : vector < cryptonote : : transaction > & txs , std : : vector < crypto : : hash > & missed_txs ) const { return false ; }
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bool get_block_by_hash ( const crypto : : hash & h , cryptonote : : block & blk , bool * orphan = NULL ) const { return false ; }
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uint8_t get_ideal_hard_fork_version ( ) const { return 0 ; }
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uint8_t get_ideal_hard_fork_version ( uint64_t height ) const { return 0 ; }
uint8_t get_hard_fork_version ( uint64_t height ) const { return 0 ; }
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uint64_t get_earliest_ideal_height_for_version ( uint8_t version ) const { return 0 ; }
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cryptonote : : difficulty_type get_block_cumulative_difficulty ( uint64_t height ) const { return 0 ; }
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bool fluffy_blocks_enabled ( ) const { return false ; }
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uint64_t prevalidate_block_hashes ( uint64_t height , const std : : vector < crypto : : hash > & hashes , const std : : vector < uint64_t > & weights ) { return 0 ; }
bool has_block_weights ( uint64_t height , uint64_t nblocks ) const { return false ; }
bool is_within_compiled_block_hash_area ( uint64_t height ) const { return false ; }
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bool pad_transactions ( ) const { return false ; }
Pruning
The blockchain prunes seven eighths of prunable tx data.
This saves about two thirds of the blockchain size, while
keeping the node useful as a sync source for an eighth
of the blockchain.
No other data is currently pruned.
There are three ways to prune a blockchain:
- run monerod with --prune-blockchain
- run "prune_blockchain" in the monerod console
- run the monero-blockchain-prune utility
The first two will prune in place. Due to how LMDB works, this
will not reduce the blockchain size on disk. Instead, it will
mark parts of the file as free, so that future data will use
that free space, causing the file to not grow until free space
grows scarce.
The third way will create a second database, a pruned copy of
the original one. Since this is a new file, this one will be
smaller than the original one.
Once the database is pruned, it will stay pruned as it syncs.
That is, there is no need to use --prune-blockchain again, etc.
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uint32_t get_blockchain_pruning_seed ( ) const { return 0 ; }
bool prune_blockchain ( uint32_t pruning_seed ) const { return true ; }
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bool get_txpool_complement ( const std : : vector < crypto : : hash > & hashes , std : : vector < cryptonote : : blobdata > & txes ) { return false ; }
bool get_pool_transaction_hashes ( std : : vector < crypto : : hash > & txs , bool include_unrelayed_txes = true ) const { return false ; }
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} ;
}