The Netflix TechBlog

JUNE 4, 2019

Because microprocessors are so fast, computer architecture design has evolved towards adding various levels of caching between compute units and the main memory, in order to hide the latency of bringing the bits to the brains. Its goal is to assign running processes to time slices of the CPU in a “fair” way. So why mess with it?

Cache 251

Cache Latency Airlines Logistics 251

ACM Sigarch

OCTOBER 25, 2019

When it comes to hardware support to mitigate software security issues, there is a significant gap between what is available in products today and known solutions. Attestation—Providing systems the means to attest or verify the integrity of their components. Also known as a “correct by construction” approach to security.

Hardware 98

Hardware Virtualization Architecture Games 98

Percona

MAY 1, 2023

Key areas include: Configuration parameter tuning : This tuning involves altering variables such as memory allocation, disk I/O settings, and concurrent connections based on specific hardware and requirements. Throughput: The throughput of an application is directly influenced by the speed at which the database can process and serve queries.

Tuning 52

Tuning Efficiency Database Performance 52

Percona

JUNE 20, 2023

.” Basic understanding In order to understand segmentation fault, it is necessary to understand memory management methods for processes. When a program leaves the memory, space becomes available; however, the OS may or may not be able to allocate vacant memory space to another program or process as it has some issues.

Programming 82

Programming C++ Database Virtualization 82

HammerDB

APRIL 19, 2023

sysbench is a widely used open-source benchmarking tool that is designed to evaluate the performance of CPU, memory, disk I/O, and database systems. In the context of MySQL performance evaluation, it simulates a typical online transaction processing (OLTP) workload on your MySQL database. Operating System: Ubuntu 22.04

Performance 54

Performance Benchmarking Cache Storage 54

The Morning Paper

MAY 23, 2019

One of the important attributes of their design was easy and rapid deployment across an existing fleet. … to realize these insights, hardware needs to access data at object granularity and must have control over pointers between objects. Hotpads is a hardware-managed hierarchy of scratchpad-like memories called pads.

Cache 61

Cache Benchmarking Hardware Java 61

Dotcom-Montior

JUNE 15, 2020

The censorship and monitoring of internet have evolved from anti-virus-like and firewall software to hardware security patches for all devices that uses internet. Operating System Updates and Security Patches. A website that is accessed in China for the first time will have a slow loading time due to this process.

Monitoring 52

Monitoring Performance Artificial Intelligence Internet 52

Testsigma

JULY 3, 2021

More control: While performing on-premise testing, organizations have more control over configurations, setup, hardware, and software. They’re free to plan their upgrades or operational maintenance without involving any third-party businesses. The subscription models are designed for you to pay for what you use.

Cloud 57

Cloud Testing Storage DevOps 57

Scalegrid

FEBRUARY 8, 2024

Key Takeaways Distributed storage systems benefit organizations by enhancing data availability, fault tolerance, and system scalability, leading to cost savings from reduced hardware needs, energy consumption, and personnel. Variations within these storage systems are called distributed file systems.

Storage 130

Storage Systems Big Data Azure 130

Testsigma

DECEMBER 28, 2019

Below given diagram presents the process of retesting : Step 1: Module 1 has been developed to produce output as A+B+2. The automation package should be designed in such a way that scripts are simple and easy to maintain. Software requirement: Which operating system, browsers will be required. Example of Retesting.

Testing 53

Testing Hardware Testing Tools Strategy 53

Dotcom-Montior

NOVEMBER 27, 2018

Additionally, end users can access your site or applications from anywhere in the world using different browsers, operating systems, and mobile devices, all with varying connection speeds. LoadView – Best Practices and Process. Distribute user load by geographical testing locations, simulating your customer base.

Performance Testing 40

Performance Testing Strategy Testing Performance 40

Adrian Cockcroft

JUNE 21, 2022

I became the Sun UK local specialist in performance and hardware, and as Sun transitioned from a desktop workstation company to sell high end multiprocessor servers I was helping customers find and fix scalability problems. We had specializations in hardware, operating systems, databases, graphics, etc.

Tuning 52

Tuning Benchmarking Engineering C++ 52

Testsigma

FEBRUARY 12, 2021

The tester can find a bug in the specifications, design, or development phase. Given the wide variety of computers, operating systems, and browsers currently available to consumers, testing these variations is important for testers to work. It becomes difficult for the production team to find out the bug and make it flawless.

Testing 54

Testing Testing Tools Software Engineering Efficiency 54

Smashing Magazine

JANUARY 15, 2019

In 2013, A List Apart published Sustainable Web Design by James Christie. how much data does the browser have to download to display your website) and resource usage of the hardware serving and receiving the website. Sustainable Web Design. In 2016, O’Reilly published “ Designing For Sustainability ” by Tim Frick.

Website Performance 73

Website Performance Website Energy Performance 73

Dynatrace

JUNE 25, 2020

Our Premium High Availability comes with the following features: Active-active deployment model for optimum hardware utilization. Save on costs for hardware and network bandwidth to optimize total cost of ownership. Cluster nodes reside in both data centers and they continuously process, store, and replicate data.

Availability 241

Availability Hardware Latency Traffic 241

Percona

AUGUST 30, 2023

In general terms, here are potential trouble spots: Hardware failure: Manufacturing defects, wear and tear, physical damage, and other factors can cause hardware to fail. heat) can damage hardware components and prompt data loss. Without data backup mechanisms, there can be data loss or system downtime.

Database 86

Database Hardware Open Source Strategy 86

Percona

APRIL 17, 2023

In this blog post, we will discuss the best practices on the MongoDB ecosystem applied at the Operating System (OS) and MongoDB levels. Operating System (OS) settings Swappiness Swappiness is a Linux kernel setting that influences the behavior of the Virtual Memory manager when it needs to allocate a swap, ranging from 0-100.

Best Practices 52

Best Practices Design Tuning Database 52

Randon ASCII

OCTOBER 4, 2020

The short version is that calls to timeBeginPeriod from one process now affect other processes less than they used to, but there is still an effect. First, a bit of operating-system design context. The answer is hardware interrupts. Let’s imagine that Process A is sitting in a loop calling Sleep(1).

Programming 145

Programming Games Hardware Operating System 145

The Morning Paper

MAY 12, 2019

An open-source benchmark suite for microservices and their hardware-software implications for cloud & edge systems Gan et al., Microservices fundamentally change a lot of assumptions current cloud systems are designed with, and present both opportunities and challenges when optimizing for quality of service (QoS) and utilization.

Open Source 61

Open Source Hardware Benchmarking Systems 61

HammerDB

JUNE 27, 2022

It enables the user to measure database performance and make comparative judgements about database hardware and software. HammerDB has graphical and command line interfaces for the Windows and Linux operating systems. Why HammerDB was developed. What programming languages does HammerDB use and why does it matter?

Benchmarking 62

Benchmarking Open Source C++ Cache 62

The Morning Paper

DECEMBER 10, 2019

. …software operating on persistent data structures requires "global" pointers that remain valid after a process terminates, while hardware requires that a diverse set of devices all have the same mappings they need for bulk transfers to and from memory, and that they be able to do so for a potentially heterogeneous memory system.

Hardware 52

Hardware Virtualization Operating System Programming 52

All Things Distributed

MARCH 11, 2016

Failures are a given and everything will eventually fail over time: from routers to hard disks, from operating systems to memory units corrupting TCP packets, from transient errors to permanent failures. This is a given, whether you are using the highest quality hardware or lowest cost components. Primitives not frameworks.

AWS 144

AWS Hardware Retail Virtualization 144

The Morning Paper

DECEMBER 8, 2019

Byte-addressable non-volatile memory,) NVM will fundamentally change the way hardware interacts, the way operating systems are designed, and the way applications operate on data. If the kernel isn’t involved in the persistent data access path, then we need a hardware solution to enforce access control.

Hardware 56

Hardware Programming Media Storage 56

Testsigma

MAY 3, 2021

Web developers are moving their focus from desktop-first to mobile-first web design which further solidifies our understanding of how important this pocket device has become. From operating systems to versions to hardware specs, mobile devices stand unique even after being billions in number. Variety of Device Settings.

Mobile 77

Mobile Testing Operating System Hardware 77

HammerDB

FEBRUARY 25, 2021

As we have seen databases are designed to handle multiple database sessions at the same time. Top 10 Processes. For this reason we need to implement our database sessions in the form of operating system threads. Basic Benchmarking Concepts. To benchmark a database we introduce the concept of a Virtual User.

Programming 67

Programming Benchmarking Virtualization C++ 67

The Morning Paper

MARCH 1, 2020

The ideal isolation solution would have the following properties: Strong isolation (multiple functions on the same hardware, protected against privilege escalation, information disclosure, covert channels, and other risks). The design of Firecracker. Wherever possible Firecracker makes use of components already built into Linux (e.g.

Serverless 101

Serverless Virtualization Lambda AWS 101

Testsigma

FEBRUARY 5, 2021

If you’re a developer, a web designer, or a QA manager, you would want to ensure that your product delivers as promised. Once you have chosen your target devices, consider the architectural aspect of your hardware. Today’s customers expect the highest standards of user experience. Device Infrastructure. Automated Testing.

Mobile 52

Mobile Testing Hardware DevOps 52

Smashing Magazine

FEBRUARY 5, 2019

Although modern iOS hardware is powerful enough to handle many intensive and complex tasks, the device could still feel unresponsive if you are not careful about how your app performs. If you scroll a table view quickly, a lot of small chunks of memory will be allocated on the fly, and this process will make the UI janky!

Performance 77

Performance Energy Operating System Code 77

SQL Server According to Bob

JANUARY 11, 2020

Most manufacturers' implementations immediately flush pending writes to physical disk during the restart operations. Example 1: ​​ Hardware failure (CPU board) Battery backup on the caching controller maintained the data. Important Always consult with your hardware manufacturer for proper stable media strategies.

Servers 40

Servers Cache Media Hardware 40

Alex Russell

SEPTEMBER 20, 2020

Pre-publication gates were valuable when better answers weren't available, but commentators should update their priors to account for hardware and software progress of the past 13 years. The world didn't yet have pervasive multi-process browser sandboxing, JS JITs , or metal-speed binary isolation. Don't like the consequences?

Hardware 64

Hardware Mobile Programming Java 64

ACM Sigarch

AUGUST 20, 2018

We are used to instances of software running on different computer systems as long as some basic requirements are met (e.g., same instruction set architecture, same operating system, etc.). Similarly, we expect that most computer systems can read (and write) data that is stored in some memory.

Hardware 47

Hardware Operating System Architecture Software 47

SQL Performance

DECEMBER 17, 2019

This removes the burden of purchasing and maintaining your hardware, storage and networking infrastructure, while still giving you a very familiar experience with Windows and SQL Server itself. You will still have to maintain your operating system, SQL Server and databases just like you would in an on-premises scenario.

Azure 72

Azure Virtualization Servers Storage 72

Percona

JULY 1, 2023

Understanding DBaaS DBaaS cloud services allow users to use databases without configuring physical hardware and infrastructure or installing software. These may be performance, high availability, operational cost, management, capacity planning, scalability, security, monitoring, etc.

AWS 52

AWS Database Serverless Storage 52

Testsigma

FEBRUARY 6, 2020

According to IEEE Std 829-1998, Software Testing is defined as “the process of analyzing a software item to detect the differences between existing and required conditions (i.e. Documents like requirements documents, design documents, code are reviewed and review comments are provided at early stages of Software Lifecycle.

Software 69

Software Software Testing Scalability 69

HammerDB

JANUARY 5, 2019

Some opinions claim that “Benchmarks are meaningless”, “benchmarks are irrelevant” or “benchmarks are nothing like your real applications” However for others “Benchmarks matter,” as they “account for the processing architecture and speed, memory, storage subsystems and the database engine.”

Benchmarking 40

Benchmarking Database Social Media Scalability 40

The Morning Paper

MAY 21, 2019

Using zswap means that no new hardware solutions are required, enabling rapid deployment across clusters. A good proxy metric for the overhead introduce by the system is the promotion rate : the rate of swapping pages from far memory to near memory. Memory pages moved to zswap are compressed (but the compressed pages stay in memory).

Software 78

Software Software Google Hardware 78

Adrian Cockcroft

NOVEMBER 11, 2019

Hence, one way to reduce risk is to make systems more observable. Another problem is that a design control, intended to mitigate a failure mode, may not work as intended. Staff should be familiar with recovery processes and the behavior of the system when it’s working hard to mitigate failures.

Latency 52

Latency Engineering Systems Hardware 52