The Netflix TechBlog

AUGUST 29, 2023

To improve availability, we designed systems where components could fail separately and avoid single points of failure. The abstractions that Eureka provides for this are Virtual IPs (VIPs) for insecure communication, and Secure VIPs (SVIPs) for secure. Afterward, Envoy behaves as if the cluster was defined in the config.

Traffic 229

Traffic Latency Cloud C++ 229

High Scalability

JULY 26, 2018

” Incredibly, this growth is largely the result of eXp Realty’s use of an online virtual world similar to Second Life. That means every employee, contractor, and the thousands of agents who work at the company show up to work—team meetings, training seminars, onboarding sessions—all inside a virtual reality campus.

Internet 124

Internet Internet Scalability Serverless 124

Dynatrace

DECEMBER 15, 2020

Upcoming Operating systems support changes. The following operating systems will no longer be supported starting 01 February 2021. The following operating systems will no longer be supported starting 01 May 2021. The following operating systems will no longer be supported starting 01 May 2021. Linux: Ubuntu 19.10.

Operating System 165

Operating System Java Mobile Cache 165

O'Reilly

FEBRUARY 25, 2025

On April 24, OReilly Media will be hosting Coding with AI: The End of Software Development as We Know It a live virtual tech conference spotlighting how AI is already supercharging developers, boosting productivity, and providing real value to their organizations. I held out hope that tweaking my system prompt would improve performance.

Code 84

Code Programming Servers Cloud 84

The Morning Paper

MAY 27, 2019

CheriABI: enforcing valid pointer provenance and minimizing pointer privilege in the POSIX C run-time environment Davis et al., And this all has to work for whole-system executions, not just the C-language portion of user processes. ASPLOS’19. The protections are hardware implemented and cannot be forged in software.

C++ 61

C++ Hardware Virtualization Benchmarking 61

O'Reilly

FEBRUARY 11, 2025

Submit a proposal for a talk at our new virtual conference, Coding with AI: The End of Software Development as We Know It.Proposals must be submitted by March 5; the conference will take place April 24, 2025, from 11AM to 3PM EDT. That might be true in some hypothetical future, but at least in the near-term future, we dont have those systems.

Programming 97

Programming Code Software Software 97

HammerDB

JULY 6, 2024

In a recent project comparing systems for MariaDB performance, a user had originally been using a tool called sysbench-tpcc to compare hardware platforms before migrating to HammerDB. However, the user was not aware that the performance could be compared between the 2. Copy Code Copied Use a different Browser./tpcc.lua idle%-99.97

C++ 52

C++ Hardware Benchmarking Virtualization 52

Dynatrace

JULY 13, 2020

Containers and Microservices: R evolution in the architecture of distributed systems . ? refers to cloud-based, containerized, distributed systems, made up of cooperating microservices, dynamically managed by automated infrastructure as code. . ? How do you make this system resilient and fault-tolerant? Cloud-native?

Google 130

Google DevOps Ecommerce Cloud 130

HammerDB

JUNE 27, 2024

Arguably, the most common beginning errors with database benchmarking is for a user to select a single point of utilisation (usually overconfigured) and then extrapolate conclusions about system performance from this single point. automates this practice by introducing the concept of performance profiles for TPROC-C workloads.

C++ 52

C++ Performance Benchmarking Virtualization 52

HammerDB

MARCH 25, 2023

Docker build, example CLI scripts were added to build and run the TPROC-C workload in the Tcl language. these were enhanced to also add Python based scripts, and to include scripts for both TPROC-C and TPROC-H and a driver script for Linux environments. With the HammerDB v4.5 In HammerDB v4.6 With HammerDB v4.7

C++ 84

C++ Virtualization Benchmarking Database 84

HammerDB

FEBRUARY 26, 2024

Many of the HammerDB TPROC-C workloads have included features to prevent the database doing maintenance tasks for the previous run whilst another run is taking place. This is particularly important when running automated workloads back-back to generate a performance profile for a progressively increasing number of virtual users.

C++ 63

C++ Cache Database Virtualization 63

O'Reilly

FEBRUARY 18, 2020

there’s a Python library for virtually anything a developer or data scientist might need to do. But Go is now the sixth most-used programming language, trailing only Python, Java,NET, and C++. Infrastructure and ops usage was the fastest growing sub-topic under the generic systems administration topic.

Software Architecture 145

Software Architecture DevOps Data Engineering Architecture 145

Brendan Gregg

SEPTEMBER 25, 2021

CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. Note that Ubuntu also has a frame to show entry into vDSO (virtual dynamic shared object). Microbenchmark os::javaTimeMillis() on both systems. As (C) looked like a kernel rebuild, I started with (D) and (E). ## 5. include <sys/time.h>

Speed 103

Speed Java AWS Virtualization 103

Brendan Gregg

OCTOBER 8, 2018

Created by Alastair Robertson , bpftrace is an open source high-level tracing front-end that lets you analyze systems in custom ways. more capable, and built from the ground up for the modern era of the eBPF virtual machine. eBPF (extended Berkeley Packet Filter) is in the Linux kernel and is the new hotness in systems engineering.

C++ 105

C++ Virtualization Programming Latency 105

KeyCDN

FEBRUARY 22, 2023

Chatbots and virtual assistants Chatbots and virtual assistants are becoming more common on websites and web applications as they provide an efficient and convenient way for users to interact with a business. WordPress is a content management system (CMS) used to build and manage websites and web applications.

Artificial Intelligence 111

Artificial Intelligence Development Serverless Website 111

Percona

JUNE 20, 2023

In order to understand “segmentation fault,” it is a must to know the basic idea of segmentation and its implementation in C programming. In order to overcome these issues, the concept of paging and segmentation was introduced, where physical address space and virtual address space were designed.

Programming 103

Programming C++ Database Virtualization 103

Percona

OCTOBER 3, 2023

Transparent Huge Pages (THP) is a memory management feature in Linux operating systems that aims to enhance system performance. By default, the majority of widely used Linux distributions employ a virtual memory page size of 4KB. In order to understand THP, we should first start with a brief description of Linux HugePages.

Database 111

Database Servers Open Source C++ 111

HammerDB

FEBRUARY 25, 2021

On high-performance multi-core systems all the supported databases can return performance in the many millions of transactions per minute. To benchmark a database we introduce the concept of a Virtual User. For HammerDB both TPROC-C and TPROC-H run all of their workloads on the database being tested in SQL. select top 100.

Programming 68

Programming Benchmarking Virtualization C++ 68

Testlodge

APRIL 14, 2021

A software tester’s work life includes making sure that systems that have been designed to achieve specific results behave exactly as they should. These systems are a combination of different hardware and software which have been configured to perform the desired task. What is Configuration Testing? An Example.

Testing 89

Testing Hardware Virtualization Operating System 89

HammerDB

NOVEMBER 23, 2021

dbset db pg dbset bm TPC-C diset tpcc pg_count_ware 20 diset tpcc pg_num_vu 4 diset tpcc pg_superuser postgres diset tpcc pg_superuserpass postgres buildschema. Running in the web service CLI we can see that the command output is returned to the user, however the virtual user output is no longer returned and instead a jobid is given.

Virtualization 71

Virtualization Benchmarking C++ Database 71

HammerDB

DECEMBER 5, 2020

compared to previous releases is that the workload names have changed from TPC-C and TPC-H to TPROC-C and TPROC-H respectively and therefore a key question is how are the v4.0 The simple answer is nothing, the workloads are exactly the same workloads derived from the TPC-C and TPC-H specifications and HammerDB v4.0

C++ 40

C++ Benchmarking Virtualization Open Source 40

HammerDB

JULY 5, 2022

So instead we are going to take a cut down version of the HammerDB TPROC-C driver script and do the same in Python and use the HammerDB infrastructure to measure performance. (We use stored procedures because, as the introductory post shows, using single SQL statements turns our database benchmark into a network test). usr/local/bin/tclsh8.6

Benchmarking 98

Benchmarking Database C++ Virtualization 98

Adrian Cockcroft

FEBRUARY 9, 2023

The next layer is operating system platforms, what flavor of Linux, what version of Windows etc. The virtualization and networking platform could be datacenter based, with something like VMware, or cloud based using one of the cloud providers such as AWS EC2. Above that there’s a deployment platform such as Kubernetes or AWS Lambda.

Engineering 136

Engineering Serverless Lambda AWS 136

O'Reilly

MAY 19, 2020

Technical leads and architects (about 11%) are next, followed by software and systems architects (9+%). However, a notable minority—some 15%—occupy C-level or executive roles. It encompasses private clouds, the IaaS cloud—also host to virtual private clouds (VPC)—and the PaaS and SaaS clouds. Impacted, yes; annulled, no.

Cloud 144

Cloud Serverless AWS DevOps 144

SQL Performance

AUGUST 2, 2019

The latest adaptation by the SQL Server team is moving the system tables (metadata) for tempdb to In-Memory OLTP (aka memory-optimized). installed on my virtual machine, which has 8GB of memory (max server memory set to 6 GB) and 4 vCPUs. OrderID , c. Customers c ON o. CustomerID = c. OrderID , c.

Servers 95

Servers C++ Testing Systems 95

HammerDB

OCTOBER 17, 2018

The official TPC-C test has a fixed number of users per warehouse and uses keying and thinking time so that the workload generated by each user is not intensive. By default each virtual user has the concept of a home warehouses where approximately 75% of its workload will take place.

C++ 40

C++ Testing Virtualization Cache 40

Percona

SEPTEMBER 28, 2023

Swappiness Swappiness is a Linux kernel parameter determining how aggressively the Linux virtual machine swaps pages between memory and the swap space on the system’s disk. Changing the value directly influences the performance of the Linux system. Lower values reduce swapping and keep more memory pages in physical memory.

Servers 128

Servers Best Practices Database Open Source 128

O'Reilly

FEBRUARY 4, 2025

Then, development of even higher-level compiled languages like Fortran, COBOL, and their successors C, C++, and Java meant that most programmers no longer wrote assembly code. Consumer operating systems were also a big part of the story. That job was effectively encapsulated in the operating system.

Programming 145

Programming Google Infrastructure Internet 145

HammerDB

JULY 16, 2021

When a system ‘scales’ it is able to deliver higher levels of performance proportional to the system resources available to it. In particular, this means as we add CPU cores and increase the system load, we see higher performance. In this example, we will compare MySQL 5.7.33 and MySQL 8.0.25 and MySQL 5.7.33.

Virtualization 58

Virtualization Performance C++ Database 58

Nick Desaulniers

APRIL 18, 2014

So a whole Babel of computer languages has been created for programmers: FORTRAN, BASIC, COBOL, LISP, Pascal, C, PROLOG, FORTH. This blog is meant for those who don’t know x86-64 assembly, but maybe know a little C, and are curious about code generation. But you never can tell exactly what the compiler is doing.

C++ 98

C++ Programming Code Virtualization 98

HammerDB

JUNE 27, 2022

HammerDB has graphical and command line interfaces for the Windows and Linux operating systems. An important concept was to simulate database users called Virtual Users in parallel (rather than concurrently) to accurately simulate a real database workload with multiple users running from separate systems. HammerDB Licensing.

Benchmarking 63

Benchmarking Open Source C++ Cache 63

HammerDB

APRIL 27, 2021

In the example below we have modified the SQL Server, number of warehouses to build and the virtual users to build them. We have set the connection value of mssqls_server and then the tpcc value of the warehouse count and the number of virtual users to build them. GUI Virtual User Options. CLI Virtual User Options.

Virtualization 74

Virtualization Benchmarking Database Operating System 74

The Netflix TechBlog

JANUARY 24, 2022

Every test runs on a combination of devices (physical and virtual) and platform versions ( SDKs ). For example they could be used to identify inflection points in system reliability, customer satisfaction, product usage, download volume or revenue. We’ll refer to each unique test/device/SDK combination as a test variation.

Performance 208

Performance Performance Testing Metrics Testing 208

HammerDB

DECEMBER 14, 2022

Our Linux test system is running a MariaDB 10.10 On a system with docker installed, use docker pull tpcorg/hammerdb to pull the latest image. Copyright (C) 2003-2022 Steve Shaw Type "help" for a list of commands Initialized new SQLite on-disk database /tmp/hammer.DB Docker Hub. Docker Pull. Use a different Browser. hammerdbcli.

C++ 63

C++ Virtualization Database Benchmarking 63

HammerDB

JULY 6, 2023

In this example, we will use the CLI to run TPROC-C on a MariaDB database to illustrate the concepts. This way is typically the fastest way to determine the maximum throughput of a database with minimal configuration, and over time has been proven to show the same performance ratios between systems as a well configured fixed throughput setup.

Virtualization 58

Virtualization C++ Database Testing 58

O'Reilly

NOVEMBER 21, 2019

In a classic 1983 paper , cognitive psychologist Lisanne Bainbridge drew attention to a curious irony: so-called “automated” systems were, in practice, usually attended by one or more human operators. The more advanced the system, she observed, “the more crucial…the contribution of the human operator.”

Processing 92

Processing Programming Virtualization Technology 92

HammerDB

DECEMBER 1, 2022

Copyright (C) 2003-2022 Steve Shaw Type "help" for a list of commands Initialized new SQLite on-disk database C:/Users/Hdb/AppData/Local/Temp/hammer.DB Copyright (C) 2003-2022 Steve Shaw Type "help" for a list of commands Initialized new SQLite on-disk database C:/Users/Hdb/AppData/Local/Temp/hammer.DB HammerDB CLI v4.6

Virtualization 58

Virtualization C++ Storage Database 58