Engineer ClickHouse in Production ClickHouse DBMS › Blazing fast › Linearly scalable › Flexible SQL dialect › Store petabytes of data › Fault-tolerant › 1000+ companies using in production › Open-source › Hundreds Database (ClickHouse!) https://github.com/donnemartin/system-design-primer 8 / 97 ClickHouse in Production: Yandex.Metrika › Third web analytics service in the world › Most popular analytics service in processed less than 5 minutes › More than 1000 servers running ClickHouse 9 / 97 ClickHouse in Production: Yandex.Metrika Site visitor Embedded JS HTTP Server Message Broker Daemons Pipeline mt-nano

eBPF Summit October 28, 2020 Debugging Go in production using eBPF ABOUT ME ? i’m Zain @zainasgar Co-Founder/CEO Pixie (@pixie_run) & Adjunct Professor of CS @ Stanford DEVELOPER PROBLEM You’re Argument Tracer ● Utilizing tracepoints for dynamic logging allows for easy instrumentation of production binaries ● The complexities of the Go ABI make it difficult to do. Especially when you consider:

Lecture Notes on Support Vector Machine Feng Li fli@sdu.edu.cn Shandong University, China 1 Hyperplane and Margin In a n-dimensional space, a hyper plane is defined by ωT x + b = 0 (1) where ω ∈ Rn the margin is defined as γ = min i γ(i) (6) 1 ? ? ! ? ! Figure 1: Margin and hyperplane. 2 Support Vector Machine 2.1 Formulation The hyperplane actually serves as a decision boundary to differentiating samples are so-called support vector, i.e., the vectors “supporting” the margin boundaries. We can redefine ω by w = � s∈S αsy(s)x(s) where S denotes the set of the indices of the support vectors 4 Kernel

Lecture 6: Support Vector Machine Feng Li Shandong University fli@sdu.edu.cn December 28, 2021 Feng Li (SDU) SVM December 28, 2021 1 / 82 Outline 1 SVM: A Primal Form 2 Convex Optimization Review parallely along ω (b < 0 means in opposite direction) Feng Li (SDU) SVM December 28, 2021 3 / 82 Support Vector Machine A hyperplane based linear classifier defined by ω and b Prediction rule: y = sign(ωTx Scaling ! and " such that min& ' & !() & + " = 1 Feng Li (SDU) SVM December 28, 2021 14 / 82 Support Vector Machine (Primal Form) Maximizing 1/∥ω∥ is equivalent to minimizing ∥ω∥2 = ωTω min ω,b ωTω

SberBank story: moving Istio from PoC to production Igor Gustomyasov, Sber Maksim Chudnovskii, IBM Sber position across key areas Best client experience Technological leadership In financial services ExportTo tuning is required 1. Resource consumption 2. Resource Mounts (#15517) 4. Tests on the production-size environment aren’t a waste of time 1. Istio Discovery Restarts (#25495) 2. Proxy Probes (#26792) Discovery for OCP & Kubernetes • Multi-cluster Service Topology • Cloud-Native Event Hub • Full Support for VM-Based Workloads • UX Simplification CONTACT US Head of integration department Igor Gustomyasov

1 Shiro support for the Spring Security plugin Table of contents 2 Shiro support for the Spring Security plugin - Reference Documentation Authors: Burt Beckwith Version: 0.1 Table of Contents 1 History 2 Usage 3 Configuration 3 1 Introduction The Spring Security Shiro plugin adds some support for using a hybrid approach combining Spring Security and . It currently only supports Shiro ACLs

1 Shiro support for the Spring Security plugin Shiro support for the Spring Security plugin - Reference Documentation Authors: Burt Beckwith Version: 1.0.0 Table of Contents 1 Introduction to the 1 Introduction to the Spring Security Shiro Plugin The Spring Security Shiro plugin adds some support for using a hybrid approach combining Spring and . It currently only supports Shiro ACLs, since

Go runtime related problems in TiDB production environment About me ● Arthur Mao(毛康力), Senior Engineer@PingCAP ● TiDB core developer (top3 contributor) ● GitBook about golang internals (@tiancaiamao)

Language Support Version 5.3.36-SNAPSHOT Table of Contents 1. Kotlin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3. Dynamic Language Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . interoperability with existing libraries written in Java. The Spring Framework provides first-class support for Kotlin and lets developers write Kotlin applications almost as if the Spring Framework was a

Kubernetes for Edge Computing across Inter-Continental Haier Production Sites Jiyuan Tang & Xin Zhang zhangxin@caicloud.io tangjiyuan@caicloud.io 关于我们 • 开源技术创新者 • 从 Kubernetes 到 Kubeflow • Google