star raft

. When most follower copy this log, it is said that this log is committed and can be executed. Leader remembers the maximum log index that has been commit and uses it to distribute the next appendentries RPC. This function is the same as the number of the TCP segment.When a leader is re-elected, its log and follower log may be inconsistent, then it forces all follower to be consistent with their own log. First leader to find the largest number consistent with the follower between the log, Then o

This is a creation in Article, where the information may have evolved or changed. This series of articles is mainly for TIKV community developers, focusing on tikv system architecture, source structure, process analysis. The goal is to enable developers to read, to have a preliminary understanding of the TIKV project, and better participate in the development of TIKV.It is important to note that TIKV is written in the rust language, and users need to have a general understanding of the rust lang

This is a creation in Article, where the information may have evolved or changed. As early as November 2013, in the raft paper can only be downloaded to the draft version on the Internet, I have written a blog on its brief analysis. Over the past 4 years, various raft agreements have been extensively explained, and raft has indeed been widely used. One of the mo

The raft protocol is easier to understand and easier to implement than the Paxos advantage. It strengthens the position of leader, divides the whole protocol into two parts clearly, and makes some simplification by using the continuity of the log: (1) leader. By leader to the follower synchronization log (2) leader hung up, select a new leader,leader election algorithm. But in essence, it is easy to place the process clear, the description is clearer,

Editor's note: This is a look at the Raft algorithm blog in the more popular one, explaining the point of view more novel, illustrated, worth a look. SOURCE Link: Why Raft is a more understandable distributed consistency algorithmConsistency is a temple-level problem in the distributed world, and its research can be traced back to decades ago.Question of the Byzantine generalLeslie Lamport, more than 30 yea

, Use logic derivation in pure English. I reluctantly read it all over again, and then feel enlightened, but you ask me to understand, my standards should still not understand. For me to understand an algorithm has a clear standard, is really understand in the mind will be able to map the algorithm into code, and read the following a paper is only if the Enlightenment can not be mapped to the definition of code.Although Lamport thinks Paxos is simple, it may be just for his mind. The fact is tha

describe his 9 years of time to publish the algorithm."There is the only one consensus protocol, and that's spaxos-all other approaches was just broken versions of Paxos." –Chubby Authors"The Dirtylittle secret of the NSDI community is so at the very five people really, trulyunderstand every part of Paxos;-). " –NSDI ReviewerNotes: Back then, I do not know how much information to read, just barely understand "Basic Paxos", due to the lack of practical experience, so far for "Multi-paxos" still

The easy-to-understand description of the Raft protocolAlthough Raft's thesis is easier to read than the Paxos simple version, the paper still radiates more and is relatively lengthy. After reading after the volume of meditation think or tidy up to be more secure, become really belong to their own. This is where I use the first lazi of black and white chess to describe and validate the work of the Raft prot

Introduction"Theory advanced in Distributed Systems-Paxos" introduces the consistency protocol Paxos, today we will learn two other common consistency protocols--raft and Zab. By comparing with Paxos, we understand the core ideas of raft and Zab and deepen the understanding of conformance agreements.RaftPaxos is biased toward theory, which mentions less about how to apply to engineering practice. The diffic

Brother even Go language training course System Design framework includes the basic language of the blockchain go language, blockchain backend technology system, blockchain public chain, blockchain distributed application development and other content, as well as to the final interview guidance and project combat. The course was carefully built by Tsinghua University's Microsoft Google Teacher team, which lasted half a year and developed together. # The distributed consistency algorithm Raftpaxo

This is a creation in Article, where the information may have evolved or changed. With the large number of high-concurrency access, massive data processing and other scenarios more and more, how to achieve the high availability of web sites, scalability, scalability, security and other goals are becoming more and more important. In order to solve such a series of problems, the architecture of large-scale web site is also evolving. To improve the high-availability architecture of a large web site

In the previous article we introduced the multi-copy state machine, raft is a multi-copy state machine that maintains multiple copy logs. Raft first will elect a unique leader, leader is responsible for the management of the log, the use of the log to add and change the status of the operation through leader completed. Leader accepts the user's log requests and distributes the logs to other nodes in the sys

Several common consensus mechanisms (pbft,raft,pow,pos,dpos,ripple) in blockchain have been summarized in recent days. Try to use simple and understandable language, the space is large, want to understand can read each algorithm introduced in front of the principle. This article mainly refers to the Blockchain technology guide, first of all to express our thanks!---Begin---Blockchain architecture is a distributed architecture. Its deployment mode has

This is a creation in Article, where the information may have evolved or changed. Introduction Because has been dealing with Raft, although Raft very familiar with, but if you want me to give a completely do not know what is Raft Raft, I think the difficulty is very big. So I decided to use my usual Luo Li, using metap

of the small number of slow machines. Why resolve consistency issues?We can say that the reliability of a distributed system reaches 99.99...%, but it cannot be said that it reaches 100%, why? It is because the consistency problem cannot be solved completely . Issues in the following four distributed systems are related to consistency issues: Reliable Multicast Reliable multicast Management of members in membership Protocal (Failuer detector) cluster Leader election electi

# # # 1.6 node tick and raft's tickelection > This section is in Raft/raft.go this file without special instructions (you can see the R *raft before the method to know that it is currently in raft.go). The Tick () method of node calls the tick () of the raft struct in raft/raft.go. In section 1.2, the step function and

In the process of learning MongoDB, a blog wrote that it used the raft algorithm to build a copy set, after a simple search of data, found a particularly good site information. This site in the form of animation, very clear and detailed explanation of the whole raft algorithm of the essence and process, only read a general understanding of the entire algorithm, indeed design is very good, and later by the a