PoP共识算法版本

1. 与旧共识版本的不同

1.1 配置文件配置项

  1. 修改的配置项

  • [validators]

    要求验证节点间两两互配(在旧共识版本中,验证节点之间不强制要求两两互配)

  1. 新增的配置项(可不配置,有默认值

  • [pconsensus]

    [pconsensus]
    omit_empty_block=true
    min_block_time=1000
    max_block_time=1000
    max_txs_per_ledger=10000
    max_txs_in_pool=100000
    time_out=3000
    

    配置名

    默认值

    可选值

    释义

    omit_empty_block

    true

    true/false

    是否忽略空区块。

    min_block_time

    1000

    >=1000

    区块最小生成时间(单位毫秒,有交易的情况下,最小出块时间)。

    max_block_time

    1000

    >=1000 && >= min_block_time

    最大区块生成时间(单位毫秒,无交易且允许空区块情况下的出块时间)。

    max_txs_per_ledger

    10000

    >0

    区块中最大交易数。

    max_txs_in_pool

    100000

    >0

    交易池中最大交易数。

    time_out

    3000

    >=3000

    交易集共识超时时间(单位毫秒)。

警告

从ChainSQL3.0版本开始采用可插拔的共识框架设计,方便接入各种共识算法。 在ChainSQL3.x版本中POP共识算法的配置发生了一些变化,详细可参考共识可插拔的配置

1.2 弱化交易提交验证

在新共识中,交易只在交易集共识完成,记入区块时执行一次,在节点收到提交的交易时,不执行交易,只验证下面的内容,验证通过放到交易池:

  • 签名

  • 账户与签名公钥的一致性

  • 账户Sequence

  • LastLedgerSequence

  • 账户余额是否足够(当交易出现排队时会不准确)

1.3 区块中包含失败交易

  1. 错误交易的行为与之前tec错误码一样。

  • 会扣掉交易费用。

  • 会改变账户sequence。

  1. 增加 ledger_txs 接口。

可查询区块中的成功、失败交易数,以及错误交易的hash及错误码,可配合ledger_data接口使用。

接口详情可查看命令行接口RPC接口JAVA接口Node.js接口。

  1. 修改交易订阅,交易状态增加validate_error

应答格式:

{
    "error_message": "Table exist and not deleted.",
    "tx_hash": "F4A88D1AD3F2FCA729A73FB874CA0BD1F3EF6CEBDEBAC976A5FE938606870AA2",
    "error": "tefTABLE_EXISTANDNOTDEL",
    "status": "validate_error"
}

关于订阅交易,可以参考各个模块相关接口:Websocket接口Java接口Node.js接口

2. 组网

  1. 与RPCA共识版本一样,支持start模式和load(--load--ledger)模式。

  • start模式下,等90秒后网络可用。

  • load模式下跟原来一样。

  1. server_info中增加字段server_status,与0.30.6版本一样都是用server_status判断节点当前状态是否可用。

  • normal 表示当前共识网络状态正常。

  • abnormal 表示当前共识网络状态异常。

3. 性能测试

3.1 环境

  • 测试环境:阿里云高主频计算型实例规格族hfc7ECS

    • CPU: Intel(R) Xeon(R) Platinum 8369HC CPU @ 3.3GHz ,4核8线程

    • 内存: 16G

  • 测试工具:jmeter + 自定义脚本

  • 节点数量:4台共识节点,一台Jmeter交易发送节点

3.2 测试步骤(模拟实际生产):

  1. 生成一批账户(同一账户无法实现并行发送交易)

  2. 根据账户文件生成测试数据(payment或insert交易的签名数据)

  3. 配置jmeter执行脚本(100线程,每个线程循环10000次,总共100万笔交易)

  4. 启动链(配置数据库)

  5. 在链上建表、授权所有人可插入

  6. 开启区块及交易数量监控工具(订阅发布的区块)

  7. 执行jmeter脚本向链上发送交易(4台中的一台接收交易)

3.3 测试结果

  • 发送

Creating summariser <summary>
Created the tree successfully using testChainsql.jmx
Starting standalone test @ Tue Apr 27 14:09:06 CST 2021 (1619503746683)
Waiting for possible Shutdown/StopTestNow/HeapDump/ThreadDump message on port 4445
summary + 186116 in 00:00:23 = 8106.8/s Avg:    10 Min:     0 Max:   262 Err:     0 (0.00%) Active: 100 Started: 100 Finished: 0
summary + 219767 in 00:00:30 = 7324.6/s Avg:    13 Min:     1 Max:   330 Err:     0 (0.00%) Active: 100 Started: 100 Finished: 0
summary = 405883 in 00:00:53 = 7663.7/s Avg:    12 Min:     0 Max:   330 Err:     0 (0.00%)
summary + 206505 in 00:00:30 = 6884.4/s Avg:    14 Min:     1 Max:   574 Err:     0 (0.00%) Active: 100 Started: 100 Finished: 0
summary = 612388 in 00:01:23 = 7381.9/s Avg:    12 Min:     0 Max:   574 Err:     0 (0.00%)
summary + 201322 in 00:00:30 = 6663.4/s Avg:    14 Min:     0 Max:   393 Err:     0 (0.00%) Active: 100 Started: 100 Finished: 0
summary = 813710 in 00:01:53 = 7190.1/s Avg:    13 Min:     0 Max:   574 Err:     0 (0.00%)
summary + 186290 in 00:00:29 = 6331.2/s Avg:    14 Min:     0 Max:   518 Err:     0 (0.00%) Active: 0 Started: 100 Finished: 100
summary = 1000000 in 00:02:23 = 7012.9/s Avg:    13 Min:     0 Max:   574 Err:     0 (0.00%)
Tidying up ...    @ Tue Apr 27 14:11:29 CST 2021 (1619503889637)
... end of run
  • 出块及包含的交易量

root@iZ0jl0b8uobbm4a6tpq55aZ:~/testChainsql# sh testSubLedger.sh
Apr 27, 2021 2:08:48 PM com.peersafe.base.client.Client log
INFO: Connecting to ws://172.16.144.180:6006
connect success
ledger index:140,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:141,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:142,ledger time:4,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:143,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:144,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:145,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:146,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:147,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:148,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:149,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:150,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:151,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:152,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:153,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:154,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:155,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:156,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:157,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:158,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:159,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:160,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:161,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:162,ledger time:4,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:163,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:164,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:165,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:166,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:167,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:168,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:169,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:170,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:171,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:172,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:173,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:174,ledger time:4,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:175,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:176,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:177,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:178,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:179,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:180,ledger time:4,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:181,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:182,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:183,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:184,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:185,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:186,ledger time:5,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:187,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:188,ledger time:3,txn_count:20000,txn_success:20000,txn_failure:0
ledger index:189,ledger time:2,txn_count:20000,txn_success:20000,txn_failure:0
  • Tps统计

root@iZ0jl0b8uobbm4a6tpq55aZ:~/testChainsql# sh calc_tps.sh
ledger time total = 141
txn_count = 1000000
txn_success = 1000000
txn_failure = 0
每秒落账交易的TPS = 7092.19/s