ZooKeeper Recipes and Solutions
In this article, you'll find guidelines for using ZooKeeper to implement higher order functions. All of them are conventions implemented at the client and do not require special support from ZooKeeper. Hopfully the community will capture these conventions in client-side libraries to ease their use and to encourage standardization. One of the most interesting things about ZooKeeper is that even tho
Consensus Protocols: Paxos | Paper Trail
You can’t really read two articles about distributed systems today without someone mentioning the Paxos algorithm. Google use it in Chubby, Yahoo used something a bit like it (but not the same!) in ZooKeeper and it seems that it’s considered the ne plus ultra of consensus algorithms. It also comes with a reputation as being fantastically difficult to understand - a subtle, complex algorithm that i
Consensus Protocols: Three-phase Commit | Paper Trail
Last time we looked extensively at two-phase commit, a consensus algorithm that has the benefit of low latency but which is offset by fragility in the face of participant machine crashes. In this short note, I’m going to explain how the addition of an extra phase to the protocol can shore things up a bit, at the cost of a greater latency. The fundamental difficulty with 2PC is that, once the decis
Consensus Protocols: Two-Phase Commit | Paper Trail
For the next few articles here, I’m going to write about one of the most fundamental concepts in distributed computing - of equal importance to the theory and practice communities. The consensus problem is the problem of getting a set of nodes in a distributed system to agree on something - it might be a value, a course of action or a decision. Achieving consensus allows a distributed system to ac
Paxos
2. ⾃自⼰己紹介 l 久保⽥田展⾏行行(@nobu_k) l 製品開発部 l Sedue/Bazil l (Jubatus) l ブル l 最近勉強してるもの l 開発⼿手法：要件定義・管理理 l 本 l Transactional Information Systems(@ノーチラス) ‒ 約1年年で念念願のリカバリーまで到達・・・！ l 分散DB本 2 3. 今⽇日の話 l Paxos l Consensus algorithm(protocol)の1つ l ものすごく難しいことで有名(主に元論論⽂文が) l 流流れ l Consensus l 問題設定 l Paxos l (ちょびっとだけ)Multi-Paxos l 参考⽂文献紹介 l ⽇日本語の⽂文献が少なく、⽤用語が怪しいですすいません 3
Raft
2. 自己紹介 久保田展行 (@nobu_k) Preferred Infrastructure America, Inc. 取締役 本日の NG ワード「いつアメリカ行くの？」 MessagePack for C,C++ メンテナ 分散システム、 DB 、検索エンジン 最近 golang に夢中 2 3. 今日の話： Raft Raft とは 複製されたログを管理するためのコンセンサス ( 合意 ) アルゴリズ ム Raft はわかりやすさを重視して作られた 既存のアルゴリズムは難しすぎて正しく実装するのが困難 もしくは、難しい部分を簡単にしようとして安全ではなくなったり この先生きのこるには分散システムの理解が必須 コンセンサスは安全な分散システムを構築する上で必須のトピック ツールとして使うにしても、中身や特性は理解しておくべき
Raft - The Understandable Distributed Protocol
Sustainable Security Requirements with the ASVS Josh Grossman provides a brief overview of what the ASVS is, but takes a closer look at balancing trade-offs and prioritizing different security requirements. Josh shares how to make the process repeatable and how to implement it as part of your own organization's requirements process.
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Raft:Understandable Distributed Consensus
https://ramcloud.stanford.edu/wiki/download/attachments/11370504/raft.pdf