Dynatrace

DECEMBER 2, 2021

SLOs can be a great way for DevOps and infrastructure teams to use data and performance expectations to make decisions, such as whether to release, and where engineers should focus their time. For example, an objective for system availability can be: 90% – one 9. Help with decision making. Promote automation. How SLOs work.

Metrics 191

Metrics Best Practices DevOps Infrastructure 191

The Morning Paper

JUNE 13, 2019

Making queries to an inference engine has many of the same throughput, latency, and cost considerations as making queries to a datastore, and more and more applications are coming to depend on such queries. Managed here means that the system automates resource provisioning for models to match a set of SLO constraints (cf.

Hardware 58

Hardware Latency Serverless Energy 58

HammerDB

MAY 5, 2019

However in the Skylake microarchitecture (you can see a list of CPUs here ) the PAUSE instruction changed and in the documentation it says “the latency of the PAUSE instruction in prior generation microarchitectures is about 10 cycles, whereas in Skylake microarchitecture it has been extended to as many as 140 cycles.”

Testing 48

Testing Tuning Latency Storage 48

The Netflix TechBlog

FEBRUARY 18, 2022

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. In this blog post, we will give an overview of the Rapid Event Notification System at Netflix and share some of the learnings we gained along the way.

Systems 334

Systems Traffic Architecture Mobile 334

Abhishek Tiwari

JULY 12, 2018

These data pipelines can process data at petabytes scale and to some extent, their success can be attributed to an army of engineers devoted to build and maintain internal data pipelines. Not everyone is operating at Netflix or Spotify scale data engineering function. In a nutshell, a data pipeline is a distributed system.

Latency 63

Latency Analytics Scalability Engineering 63

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. eBPF (extended Berkeley Packet Filter) is in the Linux kernel and is the new hotness in systems engineering. It's shaping up to be a DTrace version 2.0: Attaching 2 probes. ^C eBPF does more.

C++ 110

C++ Virtualization Programming Latency 110

The Netflix TechBlog

FEBRUARY 9, 2021

The Growth Engineering team is responsible for executing growth initiatives that help us anticipate and adapt to this change. In particular, it’s our job to design and build the systems and protocols that enable customers from all over the world to sign up for Netflix with the plan features and incentives that best suit their needs.

Engineering 142

Engineering Scalability Architecture Innovation 142

The Netflix TechBlog

JUNE 14, 2023

By the summer of 2020, many UI engineers were ready to move to GraphQL. The GraphQL shim enabled client engineers to move quickly onto GraphQL, figure out client-side concerns like cache normalization, experiment with different GraphQL clients, and investigate client performance without being blocked by server-side migrations.

Traffic 353

Traffic Latency Cache Metrics 353

The Netflix TechBlog

JUNE 13, 2023

This is where large-scale system migrations come into play. By collecting and analyzing key performance metrics of the service over time, we can assess the impact of the new changes and determine if they meet the availability, latency, and performance requirements. But what happens when this machinery needs a transformation?

Traffic 279

Traffic Metrics Systems Strategy 279

Dynatrace

JANUARY 14, 2022

Tuning thousands of parameters has become an impossible task to achieve via a manual and time-consuming approach. The optimization goal was to improve the application efficiency, that is to improve the ratio between service throughput and cloud costs while not increasing the application latency (e.g. below 500ms) and error rates (e.g.

Latency 204

Latency Tuning Efficiency AWS 204

The Morning Paper

MARCH 10, 2020

So if you want to design a system that will offer good real-world performance, it’s really useful to have benchmarks that accurately represent real-world workloads. This benchmark can synthetically generate more precise key-value queries that represent the reads and writes of key-value stores to the underlying storage system.

Benchmarking 59

Benchmarking Storage Cache Open Source 59

The Netflix TechBlog

JANUARY 10, 2024

This architecture shift greatly reduced the processing latency and increased system resiliency. By integrating with studio content systems, we enabled the pipeline to leverage rich metadata from the creative side and create more engaging member experiences like interactive storytelling.

Processing 229

Processing Media Latency Innovation 229

The Netflix TechBlog

MARCH 1, 2021

It supports both high throughput services that consume hundreds of thousands of CPUs at a time, and latency-sensitive workloads where humans are waiting for the results of a computation. The first generation of this system went live with the streaming launch in 2007. Delivery?—?A

Serverless 228

Serverless Media Latency Social Media 228

Dynatrace

JULY 24, 2023

Imagine having an AI engine that comprehends the complete context of the transaction and intelligently determines whether to send a discount code—and which one to send. Full contextual awareness helps the AI engine make informed decisions. Consider an event-driven automation system designed for incident management.

DevOps 220

DevOps Traffic Efficiency Servers 220

Brendan Gregg

OCTOBER 7, 2018

Created by Alastair Robertson , bpftrace is an open source high-level tracing front-end that lets you analyze systems in custom ways. eBPF (extended Berkeley Packet Filter) is in the Linux kernel and is the new hotness in systems engineering. It's shaping up to be a DTrace version 2.0: Attaching 2 probes. ^C eBPF does more.

C++ 40

C++ Virtualization Programming Latency 40

The Netflix TechBlog

OCTOBER 27, 2020

Data scientists and engineers collect this data from our subscribers and videos, and implement data analytics models to discover customer behaviour with the goal of maximizing user joy. The data warehouse is not designed to serve point requests from microservices with low latency.

Latency 243

Latency Storage Big Data Tuning 243

The Netflix TechBlog

MAY 14, 2021

However, they are scattered across multiple systems, and there isn’t an easy way to tie related messages together. You’re joining tables, resolving status types, cross-referencing data manually with other systems, and by the end of it all you ask yourself why? Things got hairy.

Traffic 160

Traffic Latency Java Google 160

The Morning Paper

JULY 7, 2019

Software engineering for machine learning: a case study Amershi et al., More specifically, we’ll be looking at the results of an internal study with over 500 participants designed to figure out how product development and software engineering is changing at Microsoft with the rise of AI and ML. ICSE’19. A general process.

Software Engineering 92

Software Engineering Engineering Software Software 92

The Netflix TechBlog

DECEMBER 21, 2020

Use cases We found several use cases where a system like AutoOptimize can bring tons of value. Sometimes Data Engineers write downstream ETLs on ingested data to optimize the data/metadata layouts to make other ETL processes cheaper and faster. Orient: Gather tuning parameters for a particular table that changed.

Storage 203

Storage Latency Efficiency Data Engineering 203

Percona

MARCH 23, 2023

Nowadays, solid-state drives (SSDs) or non-volatile memory express (NVMe) drives are preferred over traditional hard disk drives (HDDs) for database servers due to their faster read and write speeds, lower latency, and improved reliability. Operating system Linux is the most common operating system for high-performance MySQL servers.

Performance 124

Performance Hardware Tuning Storage 124

The Netflix TechBlog

SEPTEMBER 24, 2021

Lastly, the packager kicks in, adding a system layer to the asset, making it ready to be consumed by the clients. Uploading and downloading data always come with a penalty, namely latency. There are existing distributed file systems for the cloud as well as off-the-shelf FUSE modules for S3.

Cloud 237

Cloud Media Storage Cache 237

The Netflix TechBlog

AUGUST 22, 2019

A key responsibility of Netflix engineers is identifying gaps and pain points in the development and operation of services. First, an engineer would launch an EC2 instance and wait for the instance to come online. With their new Docker image, users launch their Packer baking jobs using Titus , our container management system.

DevOps 207

DevOps AWS Tuning Infrastructure 207

The Netflix TechBlog

AUGUST 13, 2020

You’re half awake and wondering, “Is there really a problem or is this just an alert that needs tuning? Over the years we’ve learned from on-call engineers about the pain points of application monitoring: too many alerts, too many dashboards to scroll through, and too much configuration and maintenance. By Andrei U.,

Monitoring 210

Monitoring Tuning Traffic Metrics 210

The Netflix TechBlog

JULY 21, 2022

Since memory management is not something one usually associates with classification problems, this blog focuses on formulating the problem as an ML problem and the data engineering that goes along with it. Some nuances while creating this dataset come from the on-field domain knowledge of our engineers. Labeling the data?

Big Data 179

Big Data Cache Engineering Data Engineering 179

The Netflix TechBlog

AUGUST 29, 2023

To improve availability, we designed systems where components could fail separately and avoid single points of failure. At the time, the service mesh effort was still being bootstrapped, with only a few engineers working on it. There is a downside to fetching this data on-demand: this adds latency to the first request to a cluster.

Traffic 220

Traffic Latency Cloud C++ 220

The Netflix TechBlog

NOVEMBER 2, 2020

How viewers are able to watch their favorite show on Netflix while the infrastructure self-recovers from a system failure By Manuel Correa , Arthur Gonigberg , and Daniel West Getting stuck in traffic is one of the most frustrating experiences for drivers around the world. Those two metrics are approximate indicators of failures and latency.

Traffic 252

Traffic Metrics Infrastructure Architecture 252

The Netflix TechBlog

NOVEMBER 2, 2021

The coupling problem Until recently, video quality measurements were generated as part of our Reloaded production system. This system is responsible for processing incoming media files, such as video, audio and subtitles, and making them playable on the streaming service. We call this system Cosmos. The workflow is initiated.

Media 171

Media Innovation Metrics Latency 171

Percona

APRIL 7, 2023

If we were to select the most important MySQL setting, if we were given a freshly installed MySQL or Percona Server for MySQL and could only tune a single MySQL variable, which one would it be? To be fair, that is also true with PostgreSQL; it hasn’t been tuned either, and it, too, can also perform much better.

Tuning 135

Tuning Cache Servers Benchmarking 135

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. Microbenchmark os::javaTimeMillis() on both systems. Running this on the two systems saw similar results. Try changing the kernel clocksource.

Speed 126

Speed Java AWS Virtualization 126

The Morning Paper

NOVEMBER 10, 2019

It’s been clear for a while that software designed explicitly for the data center environment will increasingly want/need to make different design trade-offs to e.g. general-purpose systems software that you might install on your own machines. The desire for CPU efficiency and lower latencies is easy to understand. Enter Google!

Network 92

Network Transportation Latency Entertainment 92

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. The main objective of this post is to share my experience over the past years tuning MongoDB and centralize the diverse sources that I crossed in this journey in a unique place. 25.84 - Total 21.04

Best Practices 52

Best Practices Design Tuning Database 52

The Morning Paper

MAY 21, 2019

” This paper describes a “far memory” system that has been in production deployment at Google since 2016. This boils down to a single digit µs latency toleration in the tail for far memory, and in addition to security and privacy concerns, rules out remote memory solutions.

Software 78

Software Software Google Hardware 78

Brendan Gregg

JUNE 30, 2018

A co-worker introduced me to Craig Hanson and Pat Crain's performance mantras, which neatly summarize much of what we do in performance analysis and tuning. Accurate benchmarking rewards engineering investment that actually improves performance, but, unfortunately, inaccurate benchmarking is more common. Don't do it. Do it less.

Benchmarking 54

Benchmarking Latency Cache Network 54

The Netflix TechBlog

DECEMBER 17, 2019

In order to be supported, a database is required to fulfill a set of features that are commonly available in systems like MySQL, PostgreSQL, MariaDB, and others. We want to support these systems as a source so that they can provide their data for further consumption. Some of DBLog’s features are: Processes captured log events in-order.

Database 197

Database Traffic Transportation Open Source 197

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. Microbenchmark os::javaTimeMillis() on both systems. Running this on the two systems saw similar results. Try changing the kernel clocksource.

Speed 40

Speed Java AWS Virtualization 40

IO River

NOVEMBER 15, 2023

This involves:Threat Intelligence: Keeping an eye on the latest types of attacks, whether it's a novel form of SQL injection or a new phishing tactic.Internal Audits: Regularly scanning your own system for vulnerabilities. Two of them are particularly gnarly: fine-tuning rules to perfection and managing a WAF over a multi-CDN architecture.

Traffic 52

Traffic Network Logistics Architecture 52

The Netflix TechBlog

DECEMBER 17, 2019

In order to be supported, a database is required to fulfill a set of features that are commonly available in systems like MySQL, PostgreSQL, MariaDB, and others. We want to support these systems as a source so that they can provide their data for further consumption. Some of DBLog’s features are: Processes captured log events in-order.

Database 212

Database Traffic Transportation Open Source 212