The Netflix TechBlog

APRIL 27, 2023

Moreover, common database optimizations like caching recently queried data don’t really work for alerting queries because, generally speaking, the last received datapoint is required for correctness. For the example query listed above, the data expressions are name,errors,:eq,:sum and name,rps,:eq,:sum.

Storage 300

Storage Cache Metrics Database 300

The Netflix TechBlog

NOVEMBER 12, 2024

Both categories share common requirements, such as high throughput and high availability. Best Effort Regional Counter This type of counter is powered by EVCache , Netflix’s distributed caching solution built on the widely popular Memcached.

Latency 253

Latency Cache Infrastructure Strategy 253

The Netflix TechBlog

JUNE 14, 2023

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. For example, is it more correct for an array to be empty or null, or is it just noise?

Traffic 358

Traffic Latency Metrics Cache 358

The Netflix TechBlog

OCTOBER 29, 2020

You only need to write platform-specific code where it’s necessary, for example, to implement a native UI or when working with platform-specific APIs. This translates to a large number of app configurations to toggle feature availability and optimize the in-app experience for each production.

Mobile 280

Mobile Cache Network Architecture 280

Dynatrace

JANUARY 31, 2024

For example, a Stanford University and UC Berkeley team noted in a research study that ChatGPT behavior deteriorates over time. Using the example of a chatbot, once the user submits a natural language prompt, RAG summarizes that prompt using semantic data. Consequently, AI model drift and hallucinations emerge as primary concerns.

Cache 215

Cache Azure Infrastructure Monitoring 215

The Netflix TechBlog

MARCH 7, 2024

These integrations are implemented through Metaflow’s extension mechanism which is publicly available but subject to change, and hence not a part of Metaflow’s stable API yet. Example use case: Building model explainers Here’s a fascinating example of the usefulness of portable execution environments.

Systems 238

Systems Media Cache Open Source 238

Alex Russell

MARCH 31, 2022

Browsers will cache tools popular among vocal, leading-edge developers. There's plenty of space for caching most popular frameworks. The best available proxy data also suggests that shared caches would have a minimal positive effect on performance. Suppose a user has only downloaded part of the cache.

Cache 89

Cache Government Traffic Network 89

The Netflix TechBlog

SEPTEMBER 18, 2024

Central to this infrastructure is our use of multiple online distributed databases such as Apache Cassandra , a NoSQL database known for its high availability and scalability. Data Model At its core, the KV abstraction is built around a two-level map architecture. Developers just provide their data problem rather than a database solution!

Latency 254

Latency Storage Cache Efficiency 254

Smashing Magazine

MAY 9, 2022

Performance Game Changer: Browser Back/Forward Cache. Performance Game Changer: Browser Back/Forward Cache. With that caveat out of the way, let’s get to the guts of the article: What is the Back/Forward Cache and why does it matter so much? Didn’t The HTTP Cache Do All That Anyway? Barry Pollard.

Cache 93

Cache Games Performance Website 93

The Netflix TechBlog

JULY 12, 2019

The Tech Hollow , an OSS technology we released a few years ago, has been best described as a total high-density near cache : Total : The entire dataset is cached on each node?—?there there is no eviction policy, and there are no cache misses. Near : the cache exists in RAM on any instance which requires access to the dataset.

Cache 184

Cache Architecture Latency Engineering 184

KeyCDN

JUNE 6, 2019

We’re happy to announce that WebP Caching has landed! The new feature integrates into the existing CDN and is available to all customers. How Does WebP Caching Work? jpg in the example above) will not change. Below is an example for Nginx that manages the delivery of WebP assets on your origin server.

Cache 81

Cache Servers Website Traffic 81

CSS Wizardry

SEPTEMBER 16, 2024

However, there are a handful of ways available to us—some are, admittedly, more easy and free than others. If you want resources to load faster on high-latency connections, making them smaller is still a sensible idea, although file size typically correlates more with available bandwidth as file sizes increase. 0⁠-⁠RTT’s best case.

Latency 215

Latency Cache Transportation Mobile 215

Dynatrace

MAY 13, 2022

Because of its scalability and distributed architecture, thousands of companies trust it to run their cloud and hybrid-based workloads at high availability without compromising performance. You can also analyze table metrics, such as cache hits and misses. Apache Cassandra is an open-source, distributed, NoSQL database.

Azure 242

Azure Latency Metrics Infrastructure 242

Dynatrace

DECEMBER 21, 2023

And while these examples were resolved by just asking a few questions, in many cases, the answers are more elusive, requiring real-time and historical drill-downs into the processes and dependencies specific to each host. A few examples: Reduce roundtrips between services (for example, the N+1 query pattern). Want to learn more?

Cloud 222

Cloud Energy Best Practices Cache 222

Dynatrace

JULY 16, 2020

I wanted to leverage Dynatrace’s Environment APIs, for example to export timeseries data, get problem stats, or change configuration settings, like enforcing a certain data privacy setting. TenantCache: a cache to store tenant information and API token information and semi-permanent data to avoid unnecessary roundtrips. ?

Cache 236

Cache Serverless Efficiency Tuning 236

The Netflix TechBlog

NOVEMBER 15, 2022

AWS AWS provides a suite of services that a VFX studio, regardless of size, can use to leverage the cloud, including AWS Thinkbox Deadline , Amazon File Cache , and Render Farm Deployment Kit on AWS (RFDK). via direct plug-ins, and is available on multi-cloud platform services. including AWS Thinkbox Deadline and Pixar’s Tractor.

Cloud 293

Cloud Entertainment AWS Infrastructure 293

Dean Hume

MAY 16, 2018

Have you ever been on a website and noticed a popup notification that suggests that there is a new version of the site available? This is where a pop up notification like Google’s Inbox provides the user with a means of always having the latest version of cached resources. then(cache => cache.addAll([ './dog.jpg'

Availability 100

Availability Cache Code Google 100

The Netflix TechBlog

SEPTEMBER 8, 2020

This allows the app to query a list of “paths” in each HTTP request, and get specially formatted JSON (jsonGraph) that we use to cache the data and hydrate the UI. For example, the artwork service is separate from the video metadata service, but we need the data from both in the detail key. This meant that data that was static (e.g.

Latency 243

Latency Cache Java Traffic 243

Percona

JUNE 22, 2023

To make data count and to ensure cloud computing is unabated, companies and organizations must have highly available databases. This guide provides an overview of what high availability means, the components involved, how to measure high availability, and how to achieve it. How does high availability work?

Availability 114

Availability Database Open Source Hardware 114

Dynatrace

SEPTEMBER 13, 2023

For example, optimizing resource utilization for greater scale and lower cost and driving insights to increase adoption of cloud-native serverless services. Storing frequently accessed data in faster storage, usually in-memory caching, improves data retrieval speed and overall system performance. Beyond

AWS 259

AWS Efficiency Azure Cloud 259

All Things Distributed

SEPTEMBER 3, 2013

Choosing your database architecture may be the most critical decision you’ll make and has a disproportionate impact on the performance, scalability, and availability of your app. Get it right and your application will seamlessly scale from hundreds to tens of millions of users without difficulty, while remaining performant and available.

Cache 101

Cache Cloud Performance Retail 101

The Netflix TechBlog

OCTOBER 16, 2019

One example displaying the need for dataset propagation: at any given time Netflix runs a very large number of A/B tests. For example, you could configure a topic to retain 10 versions or 10 days of versions. for example by region, application, or cluster. for example to train machine-learned models.

Cache 193

Cache Architecture Metrics Java 193

Dynatrace

AUGUST 30, 2019

We have several YouTube Tutorials and blog posts available that show how you can use Dynatrace RUM data for Web Performance & User Experience Optimization. Missing Cache Settings – Make sure you cache resources that don’t change often on the browser or use a CDN. Impressive results I have to say!

Cache 205

Cache Database Architecture Government 205

The Netflix TechBlog

MAY 4, 2023

It provides a good read on the availability and latency ranges under different production conditions. For example, if some fields in the responses are timestamps, those will differ. The service responsible for generating this payload consults a metadata service that provides all available streams for the given title.

Traffic 349

Traffic Latency Tuning Systems 349

Dynatrace

NOVEMBER 3, 2021

For example, we can actively watch a single metric for changes that indicate a problem — this is monitoring. For example, when monitoring a database, you’ll want to know about any latency when writing data to a disk or average query response time.

Monitoring 233

Monitoring Metrics DevOps Scalability 233

The Netflix TechBlog

JULY 1, 2019

While web browsers and mobile phones have gigabytes of memory available for graphics, our devices are constrained to mere MBs. Our UI runs on top of a custom rendering engine which uses what we call a “surface cache” to optimize our use of graphics memory. The majority of legacy devices run at 28MB of surface cache.

Cache 167

Cache Design Testing Development 167

The Netflix TechBlog

NOVEMBER 4, 2019

As an example, our data is centered around a creative service to keep track of the creatives we build. Best of all, our page can load much faster since everything is cached in Elasticsearch. For example, if a title ranking changes, we need to find the related show, then its corresponding creative, and reindex it.

Cache 248

Cache Database Servers Performance 248

The Netflix TechBlog

JULY 21, 2022

More importantly, the low resource availability or “out of memory” scenario is one of the common reasons for crashes/kills. Some features (as an example) include Device Type ID, SDK Version, Buffer Sizes, Cache Capacities, UI resolution, Chipset Manufacturer and Brand. Labeling the data?—?Ground

Big Data 190

Big Data Cache Engineering Data Engineering 190

The Netflix TechBlog

SEPTEMBER 10, 2024

Throughout this evolution, we’ve been able to maintain high availability and a consistent message delivery rate, with Pushy successfully maintaining 99.999% reliability for message delivery over the last few months. When our partners want to deliver a message to a device, it’s our job to make sure they can do so.

Latency 233

Latency Cache Tuning Efficiency 233

The Netflix TechBlog

MARCH 7, 2023

Goals Annotation Operations Lets pick an example use case of identifying objects (like trees, cars etc.) There are many naive solutions possible for this problem for example: Write different runs in different databases. in a video file. This seems very similar (not exactly same) to a distributed transaction. Write algo runs into files.

Media 275

Media Latency Architecture Database 275

Dynatrace

DECEMBER 20, 2021

For example, the <body> element of your page exists on one branch of this tree structure, with any <img> assets branching off. Consider the example of “rage clicks,” which are rapid clicks (or taps) on the same spot when a feature is unresponsive. For example, are all user bounces caused by the same issue?

Mobile 255

Mobile Website Analytics Cache 255

CSS Wizardry

AUGUST 7, 2019

only to find that the resource they’re requesting isn’t in that PoP ’s cache. For example, request collapsing , edge-side includes , etc.). This is exactly what we did at BBC iPlayer last year: The newly-available Server-Timing header can be added to any response. Routing: If you are using a CDN—and you should be!—a

Latency 271

Latency Ecommerce Servers Mobile 271

CSS Wizardry

NOVEMBER 9, 2018

This is best illustrated with an example. We’re bound to an inefficient caching strategy: a change to, say, the background colour of the currently-selected day on a date picker used on only one page, would require that we cache-bust the entirety of app.css. This reduces the size of the blocking CSS on the Critical Path.

Network 279

Network Performance Media Cache 279

Testsigma

JUNE 3, 2021

Example: An e-commerce website is unable to process the payment part. On-screen information for users: The information which is required by the user should be available on the application screen itself. Example: divide by zero, multiplication of 2 large numbers, etc. The UI is meant to be intuitive and easy for the user.

Software 82

Software Software Testing Hardware 82

Dynatrace

MAY 17, 2023

But its underlying goal is quite humble and straightforward: it wants to enable you to observe an IT system (for example, a web application, infrastructure, or services) and gain insight to its behavior, such as performance, error rates, hot spots of executed instructions in code, and more. Those are prime candidates for their own spans.

Metrics 192

Metrics Open Source Traffic Cache 192

Scalegrid

APRIL 16, 2020

Each of these models is suitable for production deployments and high traffic applications, and are available for all of our supported databases, including MySQL , PostgreSQL , Redis™ and MongoDB® database ( Greenplum® database coming soon). Let’s walk through an example: Database: MySQL. Cloud Provider: AWS. Startup Hosting Credits.

Cloud 242

Cloud Azure AWS Database 242

The Netflix TechBlog

NOVEMBER 23, 2020

Introducing gnmi-gateway: a modular, distributed, and highly available service for modern network telemetry via OpenConfig and gNMI By: Colin McIntosh, Michael Costello Netflix runs its own content delivery network, Open Connect , which delivers all streaming traffic to our members. Some leaves are removed for brevity.

Open Source 188

Open Source Network Transportation Cache 188