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如何理解 Scalability

关注「前端向后」微信公众号,你将收获一系列「用心原创」的高质量技术文章,主题包括但不限于前端、Node.js以及服务端技术 一.Scalability 是什么? Scalability is the property of a system to handle a growing amount of work by adding resources to the (摘自Scalability) 即,通过向系统添加资源的方式应对不断增加的工作量 那么,如何添加资源呢? 提升可扩展性的主要途径是将耗时的同步工作改成异步处理,从而允许将这些工作“外包”给多个 Worker 去做,或者提前完成能够预知的部分 参考资料 CS75 (Summer 2012) Lecture 9 Scalability Harvard Web Development David Malan:以及PDF 课件 Scalability for Dummies

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【NDN安全】Security & Scalability of Content-Centric Networking 全文翻译

Security &Scalability of Content-Centric Networking 内容中心网络的安全性和可扩展性 Tobias Lauinger Technische University

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    C++ FFLIB之FFRPC:多线程&多进程的scalability探索

    在跟一个朋友讨论多线程和多进程的问题时,引发了如何才能是系统更加scalability的思考。把自己的一些想法用ffrpc写了一个demo。 那么什么样的设计能够尽量保证scalability呢? 如何更好的使用多线程,或者说使用多线程应该遵循什么样的原则才能避免麻烦。 能不能有权衡二者的scalability方案? FFRPC实现scalability: 在设计ffrpc的时候,首先其适合类似于网游多进程架构的场景。 logic_service@1-4 总结: 本例中logic_service和db_service集成到了一个程序中,使用ffrpc可以通过多线程实现并发,各个服务使用异步回调和消息通信,通过配置实例的个数,从而实现多线程的scalability

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    Java并发编程实战系列11之性能与可伸缩性Performance and Scalability

    线程可以充分发挥系统的处理能力,提高资源利用率。同时现有的线程可以提升系统响应性。 但是在安全性与极限性能上,我们首先需要保证的是安全性。 11.1 对性能的...

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    如何提高Elasticsearch搜索的相关性

    首先写入一些测试数据, PUT demo_idx/_doc/1 { "content": "Distributed nature, simple REST APIs, speed, and scalability " } PUT demo_idx/_doc/2 { "content": "Distributed nature, simple APIs, speed, and scalability" } PUT demo_idx/_doc/3 { "content": "Known for its simple REST APIs, distributed nature, speed, and scalability 0.6970792, "_source" : { "content" : "Distributed nature, simple APIs, speed, and scalability "_source" : { "content" : "Known for its simple REST APIs, distributed nature, speed, and scalability

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    理解超级账本架构的可扩展性

    原文标题:Understanding the Scalability of Hyperledger Fabric 原文: The rapid growth of blockchain systems benchmarking the system are limited in their scope: some consider only small networks, others consider scalability Our results demonstrate that Fabric v1.1’s scalability bottlenecks lie in the communication overhead Understanding the Scalability of Hyperledger Fabric.pdf

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    WebRTC系列分享 | WebRTC视频QoS全局技术栈

    SVC SVC(可适性视频编码或可分级视频编码)是传统H.264/MPEG-4 AVC编码的延伸,可提升更大的编码弹性,并具有时间可适性(Temporal Scalability)、空间可适性(Spatial Scalability)及质量可适性(SNR/Quality/Fidelity scalability)三大特性,使视频传输更能适应在异质的网络带宽。 实际上Spatial Scalability和quality scalability这种方案会增加传输码率,降低编解码器性能、提高编解码器的复杂度、在一些场景下还需要服务器支持SVC层级过滤。 使得SVC的Spatial Scalability和quality scalability到目前为止还没有大规模应用。但是Temporal Scalability可以在不稳定网络视频传输上被使用。 并且Temporal Scalability可以做到后向兼容,不需要解码器做特殊处理。 4.

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    开源数据库PostgreSQL发布了v9.2版

    release was announced in May, developers and vendors have praised it as a leap forward in performance, scalability packages and installers Release Notes Documentation What’s New in 9.2 Press Kit Improved Performance and Scalability With the addition of linear scalability to 64 cores, index-only scans and reductions in CPU power consumption , PostgreSQL 9.2 has significantly improved scalability and developer flexibility for the most demanding Improvements in vertical scalability increase PostgreSQL’s ability to efficiently utilize hardware resources

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    System|分布式|Chain Replication

    这就导致了scalability的问题,因为广播的吞吐量随着备份数的增长而线性增长,主节点承载着更大的压力。 因为其与上述的广播类备份协议相比,在需要scalability的workload下吞吐量具备优势,因此也被用于许多工业产品例如Ceph。 ---- 总结 广播式星型备份,存在scalability的问题 链式复制延续了ROWAA(read one, write all available)的思路,而很多其他系统为了保证scalability 主要亮点我觉得是均摊开销解决scalability+平滑扩容解决availability, 用了Sent来处理错误情况和扩容的情况,slide和视频都不提这个Sent,果然还是得看原文才能更理解。

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    袖珍分布式系统(一)

    在作者看来所有的问题起源都是:size - scalability everything starts with the need to deal with size everything starts with size - scalability 那什么是scalability呢? Scalability is the ability of a system, network, or process, to handle a growing amount of work in a scalability:伸缩性,系统伸缩性好意味着当系统处理growing amount of work的时候,即使处理难度不是线性增长的,也应该是可预测的,而不是指数级增长的。 作者又举了3个具体的例子: Size scalability: adding more nodes should make the system linearly faster; growing the

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    It can make your ssh login simply as well as efficiently on Mac or Linux

    . ---- ssha Tool Characteristics Scalability configuration Automatic interaction login Support password ➜ ~ curl -sSL https://raw.githubusercontent.com/alicfeng/sshAutoLogin/master/Redhats.sh | bash Scalability

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    工业电力系统可扩展快速减载技术的开发和验证

    fast load shedding algorithm for industrial power system to increase performance, reliability, and scalability The scalability of the load shedding algorithm is thus verified, confirming its performance with respect

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    使用Razee连续部署模型和Kubernetes运营商实现可操作性(cs.DC)

    However, even with Kubernetes orchestration, cloud service providers frequently have operational scalability conjunction with Operators on Kubernetes simplifies application life cycle management and increases scalability Achieving Operational Scalability Using Razee Continuous Deployment Model and Kubernetes Operators.pdf

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    分布式系统的一些阅读笔记

    Scalability: is the ability of a system, network, or process, to handle a growing amount of work in a 一共有三种: Size scalability: adding more nodes should make the system linearly faster; growing the dataset should not increase latency Geographic scalability: it should be possible to use multiple data centers Administrative scalability: adding more nodes should not increase the administrative costs of the system 当然这三可遇不可求,比如Geographic scalability也就google的spanner Performance: is characterized by the amount of useful

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    超越 EfficientNet!小米AutoML 团队开源 Scarlet 模型!

    论文:SCARLET-NAS: Bridging the gap Between Scalability and Fairness in Neural Architecture Search ? Beyond MobileNetV3 https://arxiv.org/abs/1908.01314 • Chu et al., ScarletNAS: Bridging the Gap Between Scalability

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    定制开发——GitHub 热点速览 v.21.15

    GitHub Trending 周榜 2.1 大型系统的学习资料:awesome-scalability 本周 star 增长数:1,850+ Awesome-scalability 是一个构建大型系统的阅读列表 GitHub 地址→https://github.com/binhnguyennus/awesome-scalability ?

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    架构操练Kata:魔兽先锋

    访客可以观察全部游戏玩家的活动,但不会被玩家看到,且不会与之互动; 玩家能够创建新的地图,武器,甚至是游戏规则(如单一武器,夺旗战等); 背景信息 游戏的性能需要优先满足,但相比之下,当玩家数量激增时系统的可伸缩性(scalability can create new maps, weapons, and rules Additional Context: gaming performance is high priority, but scalability

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    SPACE:通过空间注意和分解的无监督的面向对象的场景表示(cs CV)

    representation learning are either based on spatial-attention or scene-mixture approaches and limited in scalability SPACE also resolves the scalability problems of previous methods by incorporating parallel spatial-attention

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    PISTIS:从口口相传到君子协定

    showing how to build distributed protocols that provide both real-time with practical performance, and scalability Extensive empirical evaluations showcase PISTIS's robustness, latency, and scalability.

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