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Fast memcpy, A System Design

ACM Sigarch

We look here at a Gedankenexperiment: move 16 bytes per cycle , addressing not just the CPU movement, but also the surrounding system design.

Systems 114
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Rapid Event Notification System at Netflix

The Netflix TechBlog

To this end, we developed a Rapid Event Notification System (RENO) to support use cases that require server initiated communication with devices in a scalable and extensible manner. This messaging system is described in this blog post.

Systems 207
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A Primer on Distributed Systems Observability

DZone

In the past few years, the complexity of systems architectures drastically increased, especially in distributed, microservices-based architectures. This is an article from DZone's 2022 Performance and Site Reliability Trend Report. For more: Read the Report.

Systems 213
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Using Psutil Module for System Monitoring [+Bonus]

DZone

Thus, managing system processes and profiling is better off without it. With this in mind, you might need to create a script that goes through the system processes and provides a report when the script runs. python system monitoring plotlyLet’s face it: the mighty Task Manager isn’t a magic wand for all operations. Unless you’re into the dread of manual and repetitive checks. That is why we need an effective alternative to assess the impact of our test.

Systems 161
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Making of Unreliable Systems

DZone

Knowing anti-patterns and pitfalls is often more useful than knowing patterns when designing a system, so I decided to write this blog post about factors that I think will lead to producing unreliable systems from my experiences in designing (mostly) distributed enterprise applications.

Systems 100
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Monitoring Distributed Systems

Dotcom-Montior

Web developers or administrators did not have to worry or even consider the complexity of distributed systems of today. Great, your system was ready to be deployed. Once the system was deployed, to ensure everything was running smoothly, it only took a couple of simple checks to verify.

Systems 66
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Timestone: Netflix’s High-Throughput, Low-Latency Priority Queueing System with Built-in Support…

The Netflix TechBlog

Source: The Netflix Cosmos Platform Some of the key requirements this priority queueing system would need to satisfy: 1. System Architecture Timestone is a gRPC-based service. The system diagram for the application is shown in Figure 2. Timestone system diagram.

Latency 187
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Hawkins: Diving into the Reasoning Behind our Design System

The Netflix TechBlog

Hawkins is the namesake that established the basis for a design system used across the Netflix Studio ecosystem. A design system, such as the one we developed for the Netflix Studio, can help alleviate most of these headaches. What is a design system?

Systems 197
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Article: Design Pattern Proposal for Autoscaling Stateful Systems

InfoQ Articles

In this article, Rogerio Robetti discusses the challenges in auto-scaling stateful storage systems and proposes an opinionated design solution to automatically scale up (vertical) and scale out (horizontal) from a single node up to several nodes in a cluster with minimum configuration and interference of the operator.

Systems 89
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Reinventing virtualization with the AWS Nitro System

All Things Distributed

A great example of this approach to innovation and problem solving is the creation of the AWS Nitro System , the underlying platform for our EC2 instances. Running a business at the scale of Amazon, we often have to solve problems that no other company has faced before.

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Chaos Mesh — A Solution for System Resiliency on Kubernetes

DZone

Traditionally we use unit tests and integration tests that guarantee a system is production-ready. To better identify system vulnerabilities and improve resilience, Netflix invented Chaos Monkey , which injects various types of faults into the infrastructure and business systems.

Systems 179
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Design Systems and Testability With Applitools

DZone

May 2020, Applitools had the pleasure of hosting Tyler Krupicka from Intuit for an hour-long webinar discussing design systems and testability. At Intuit, Tyler works on the "Player/Design Systems" team, where he focuses on design systems.

Systems 130
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Understanding When to Use a Test Tool vs. a Test System

DZone

Yet, for all the importance that testing has in the SDLC, there is a misconception among many about the difference between a testing tool and a testing system. performance test tools test systemTesting is a mission-critical aspect of the software development lifecycle (SDLC).

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How Do You Test A Design System? — Advanced Topics

DZone

How do you test a design system? You got here because you either have a design system or know you need one. Marie Drake , Principal Test Automation Engineer at News UK , presented her webinar, " Roadmap To Testing A Design System ", where she discussed this topic in some detail.

Systems 141
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Five-nines availability: Always-on infrastructure delivers system availability during the holidays’ peak loads

Dynatrace

The nirvana state of system uptime at peak loads is known as “five-nines availability.” In its pursuit, IT teams hover over system performance dashboards hoping their preparations will deliver five nines—or even four nines—availability.

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It’s time to upgrade the PTC System Monitor (PSM)!

Dynatrace

As a PSM system administrator, you’ve relied on AppMon as a preconfigured APM tool for detecting, diagnosing, and repairing problems that impact the operational health of your Windchill application suite. The post It’s time to upgrade the PTC System Monitor (PSM)!

Systems 144
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Desupport of monitoring for legacy 32-bit operating systems

Dynatrace

We’re continuously working to support the most popular operating systems with high quality OneAgent deployment options. Of course, it’s possible to run a legacy 32-bit application on a 64-bit operating system. Dynatrace news.

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The Block Allocation Policy of Virtual Distributed File System at the Source Code Level

DZone

Alluxio workers are responsible for managing local resources, and they store data as blocks. Users can allocate different storage tiers as the resources for Alluxio workers, including MEM/SSD/HDD, which are further composed of directories.

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LISA2019 Linux Systems Performance

Brendan Gregg

Systems performance is an effective discipline for performance analysis and tuning, and can help you find performance wins for your applications and the kernel. I've also been working on Systems Performance 2nd Edition, now that the [BPF book] is done.

Systems 92
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Engineering dependability and fault tolerance in a distributed system

High Scalability

This means a system that is not merely available but is also engineered with extensive redundant measures to continue to work as its users expect. In large-scale systems, the assumption has to be that component failures will happen sooner or later.

Systems 190
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Composition-Based Design System In Figma

Smashing Magazine Graphics

Composition-Based Design System In Figma. Composition-Based Design System In Figma. Working as a designer on a design system for a large product has taught me how precious the time you spend on a single task/component is. Now scale this to a whole design system.

Systems 106
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What is log management? How to tame distributed cloud system complexities

Dynatrace

Log management is an organization’s rules and policies for managing and enabling the creation, transmission, analysis, storage, and other tasks related to IT systems’ and applications’ log data. Distributed cloud systems are complex, dynamic, and difficult to manage without the proper tools.

Systems 173
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Understanding, detecting and localizing partial failures in large system software

The Morning Paper

Understanding, detecting and localizing partial failures in large system software , Lou et al., Partial failures ( gray failures ) occur when some but not all of the functionalities of a system are broken. overhead in terms of system throughput.

Systems 82
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Benefits of Using an Online Bug Tracking System

DZone

When a software program or an application does not work the way it is created or designed to perform, it is called a software bug. In most cases, these errors are caused by developers or designers.

Systems 208
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Free Google Book: Building Secure and Reliable Systems

High Scalability

Google added another book into their excellent SRE series: Building Secure and Reliable Systems. Copy/pasting a few paragraphs: "In this book we talk generally about systems, which is a conceptual way of thinking about the groups of components that cooperate to perform some function.

Google 183
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Application Modernization Benefits – Exploring the Future of Legacy Systems

Simform

Transforming monolithic systems with new features and services that align with the current market trends improves processes and business productivity.

Systems 52
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Benchmarking spreadsheet systems

The Morning Paper

Benchmarking spreadsheet systems Rahman et al., They often freeze during computation, and are unable to import datasets well below the size limits posed by current spreadsheet systems. The other systems avoid this recomputation, but are slower than Excel for value-only datasets.

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Reinventing virtualization with the AWS Nitro System

All Things Distributed

A great example of this approach to innovation and problem solving is the creation of the AWS Nitro System (Nitro System), the underlying platform for our EC2 instances. Running a business at the scale of Amazon, we often have to solve problems that no other company has faced before.

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Unlocking Enterprise systems using voice

All Things Distributed

The interfaces to our digital system have been dictated by the capabilities of our computer systems—keyboards, mice, graphical interfaces, remotes, and touch screens. As a result, they fail to deliver a truly seamless and customer-centric experience that integrates our digital systems into our analog lives. All of these benefits make voice a game changer for interacting with all kinds of digital systems.

Systems 86
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MySQL Memory Management, Memory Allocators, and Operating System

DZone

performance mysql memory operating system bug memory management memory allocatorsWhen users experience memory usage issues with any software, including MySQL, their first response is to think that it’s a symptom of a memory leak. As this story will show, this is not always the case. This story is about a bug.

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When distributed systems get frustrated

Particular Software

YTSunnys) July 15, 2019 Distributed systems can “get frustrated” too. Failure on repeat Distributed software systems built with NServiceBus are pretty great about dealing with all kinds of failure. lets you do the same thing with your distributed system.

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Top 7 Signs That Your Legacy System Needs Modernization

Simform

Most enterprises have legacy custom applications supporting critical business operations. Over time these applications become hard to up­date and costly to maintain. However, replacing these applications with newer ones is also complex and expensive in the early stages. Software Development

Systems 52
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Deployment challenges with large enterprise systems

Dynatrace

For small deployments, it isn’t a problem however when scaling up to hundred or even thousands of systems things can become complicated. Even when all the systems are mapped correctly by Dynatrace, identifying these systems is a real challenge. When deploying on multiple machines, the one agent will group all the instances of the same system together. Dynatrace will automatically group both systems. System (Tibco, API-gateway, Weblogic, shared-middleTier).

Systems 117
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Wireless attacks on aircraft instrument landing systems

The Morning Paper

Wireless attacks on aircraft instrument landing systems Sathaye et al., Today’s paper is a good reminder of just how important it is becoming to consider cyber threat models in what are primary physical systems, especially if you happen to be flying on an aeroplane – which I am right now as I write this! The first fully operational Instrument Landing System (ILS) for planes was deployed in 1932. USENIX Security Symposium 2019.

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Introducing WorkflowGuard: The Workflow Governance and Observability System That Oversees over 120,000 Data Workflows

Uber Engineering

Our Data Workflow Platform team introduces WorkflowGuard: a new service to govern executions, prioritize resources, and manage life cycle for repetitive data jobs. Check out how it improved workflow reliability and cost efficiency while bringing more observability to users. Data / ML

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Scaling Uber’s Apache Hadoop Distributed File System for Growth

Uber Engineering

This analysis powers our services and enables the delivery of more seamless and reliable user … The post Scaling Uber’s Apache Hadoop Distributed File System for Growth appeared first on Uber Engineering Blog. Three years ago, Uber Engineering adopted Hadoop as the storage ( HDFS ) and compute ( YARN ) infrastructure for our organization’s big data analysis.

Systems 86
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Mutation Testing Systems: Improving the Quality of Tests

DZone

Professionally, I label myself as a developer, although I don’t like labels very much, and I prefer to say that the reason for my work is: to create quality software. But what is quality software ? I like to define it as follows: Quality software is that which meets the user's needs.

Systems 147
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LISA2019 Linux Systems Performance

Brendan Gregg

Systems performance is an effective discipline for performance analysis and tuning, and can help you find performance wins for your applications and the kernel. I've been working on Systems Performance 2nd Edition, now that the [BPF book] is done.

Systems 52
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Systems Performance: Enterprise and the Cloud, 2nd Edition

Brendan Gregg

Eight years ago I wrote _Systems Performance: Enterprise and the Cloud_ (aka the "sysperf" book) on the performance of computing systems, and this year I'm excited to be releasing the second edition. In a way, Systems Performance is volume 1 and BPF Performance Tools is volume 2.

Systems 100
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Checksums in Storage Systems and Why the Enterprise Should Care

DZone

Let’s assume for a moment that your data survives its many passes through a system’s DRAM and emerges intact. That data must then be safely transported over a network to the storage system where it is written to disk. Random bit flips are far more common than most people, even IT professionals, think. Surprisingly, the problem isn’t widely discussed, even though it is silently causing data corruption that can directly impact our jobs, our businesses, and our security.

Storage 130
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How to Trace Linux System Calls in Production (Without Breaking Performance)

DZone

If you need to dynamically trace Linux process system calls, you might first consider strace. So are there any tools that excel at tracing system calls in a production environment? This blog post introduces perf and traceloop, two commonly used command-line tools, to help you trace system calls in a production environment. strace is simple to use and works well for issues such as "Why can't the software run on this machine?"

Systems 142
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Dynatrace and AWS Systems Manager – Automate OneAgent distribution securely, centrally and at scale

Dynatrace

We’re pleased to announce that Dynatrace is among the first set of partners to offer support for AWS Distributor , a capability of AWS Systems Manager, that allows you to select from available popular third party agents to install and manage. What is AWS Systems Manager Distributor?

AWS 157
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Destructive Testing – How to Tear Apart a System

Testlodge

” Destructive testing is a method that uses the system in a way other than intended to make the software program deliberately fail. How the system responds is then analyzed. Other tools are automated that let the tester fuzz test the system using fault injection techniques.

Systems 73