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IOST特点
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Topic: IOST特点 (Read 104 times)
stenrsdaw
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IOST特点
May 06, 2018, 09:01:46 AM
#1
1 EDS (Efficient Distributed Sharding, 即“高速分布式分片”)
还是拿“公共账本”来举例,EDS技术就像是把网络中的所有账户随机分成群组,群组内的账户只需要验证自己群组内发起的交易即可,极大程度提高了交易的验证效率。
打个比方,如果我们将区块链的世界想像为一个班级,那么传统区块链(如比特币)不论大事小情,都需要全体同学确认一遍,这很安全,但无疑效率极低。于是,合理的做法是将班级分为不同小组,每同学只验证组内的交易,而为了防止小组成员合伙改账本,这种分组是动态随机的。
2 两段式共识机制
所谓共识机制,就是如何保证可信度。IOST提出了POB(Proof-of-Believability consensus approach)这一概念,即可信度证明。将交易的验证工作随机分配给“群组”里可信度更高的节点,其他节点进行监督和抽查。这种共识机制将验证工作和监督工作进行分工,有效提高验证效率的同时,保证了验证结果的可信度。
我们还是用上面班级的例子,这个机制就好比在小组中找出能力强、品德好的同学作小组代表,每隔一段时间由其他同学检查一下他的工作,在效率和可信度上取得平衡。那么问题是,我们如何认定作为某位同学能作为代表呢?传统区块链(如比特币)用的是POW( proof of work)即工作量证明,但我们知道,干得多的人品德不一定好。因此IOST提出了POB,其中的可信度因素包括了IOS token余额、Servi余额、评论和用户行为。就好比班上同学的成绩不仅看分数,也看平时表现。
3 Atomix协议
既然EDS技术将“公共账本”进行了分组,那么跨群组之间的交易怎么办?因此IOST开了Atomix协议,将验证和监督工作放在产生交易的两个群组之间,减少受到整个IOST系统网络状态的影响。
也就是两个小组之间发生交易,就由两个小组的同学用特殊方式决定,不给整个班带来影响。
4 微状态块
就像是将一段时间内产生的账目汇总,形成一个阶段性的总账,新进入账户无需下载全部历史账单,只需要下载这些总账即可,极大程度缩小了存储空间和更新时间,使得新进入的节点可以快速跟上目前的进度。
这就相当于来了新同学,为了让他更快融入集体,班上准备了年报,年报每年更新,新同学只需要阅读年报,就能知道之前发生的事,不必把所有账翻一遍。
利用这些技术手段,IOST成为应用更为广泛的区块链系统,可以容纳更多更复杂的应用,也可以给更海量的用户提供服务,同时在安全性和信息吞吐量上更有保证。
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