The Netflix TechBlog

SEPTEMBER 8, 2020

Functional Testing Functional testing was the most straightforward of them all: a set of tests alongside each path exercised it against the old and new endpoints. In this step, a pipeline picks our candidate change, deploys the service, makes it publicly discoverable, and redirects a small percentage of production traffic to this new service.

Latency 241

Latency Cache Java Traffic 241

Dynatrace

SEPTEMBER 20, 2019

One is the currently-running production environment receiving all user traffic (let’s say the “blue” one), the other is a clone of it (“green”), but idle. Once the testing results are successful, application traffic is routed from blue to green. Response time for blue/green environment traffic.

Systems 38

Systems Traffic DevOps Database 38

Dynatrace

JUNE 1, 2023

Fitness app : The fitness app should offer a response time of less than 500 milliseconds for exercise tracking and data recording. This SLO enables a smooth and uninterrupted exercise-tracking experience. The traffic SLO targets the website’s ability to handle a high volume of transactional activity during periods of high demand.

Traffic 173

Traffic Website Latency DevOps 173

Percona

AUGUST 8, 2023

Or worse yet, sometimes I get questions about regaining normal operations after a traffic increase caused performance destabilization. But we can discuss common bottlenecks, how to assess them, and have a better understanding as to why proactive monitoring is so important when it comes to responding to traffic growth.

Traffic 98

Traffic Cache Monitoring Database 98

The Morning Paper

NOVEMBER 14, 2019

Taiji: managing global user traffic for large-scale internet services at the edge Xu et al., It’s another networking paper to close out the week (and our coverage of SOSP’19), but whereas Snap looked at traffic routing within the datacenter, Taiji is concerned with routing traffic from the edge to a datacenter. SOSP’19.

Traffic 42

Traffic Internet Internet Latency 42

All Things Distributed

OCTOBER 2, 2017

VPC Endpoints give you the ability to control whether network traffic between your application and DynamoDB traverses the public Internet or stays within your virtual private cloud. Performant – DynamoDB consistently delivers single-digit millisecond latencies even as your traffic volume increases.

Internet 110

Internet Internet AWS Performance 110

Dynatrace

MAY 28, 2020

Once Dynatrace sees the incoming traffic it will also show up in Dynatrace, under Transaction & Services. We can also save that view on our service which makes it more convenient for future analysis exercises. After it’s deployed, verify that the application is up and running by accessing it through its public IP.

Engineering 270

Engineering Performance Metrics Best Practices 270

Percona

DECEMBER 5, 2023

The scenario Service considerations In this exercise, we wanted to perform a major version upgrade from PostgreSQL v12.16 Then, we need a small downtime window just to move the traffic from the original instance to the upgraded one. to PostgreSQL v15.4.

Database 103

Database Traffic C++ Servers 103

Speed Curve

MARCH 5, 2023

Background For this new investigation, I selected four sites that experience a significant amount of user traffic. In this post, I'll show how to use your own data to find the poverty line for your site, and then what to do with your new insights.

Performance 128

Performance C++ Metrics Ecommerce 128

The Morning Paper

SEPTEMBER 24, 2019

The apps are driven using Android’s Application Exerciser Monkey which injects a pseudo-random stream of simulated user input events into the app (a UI fuzzer). Network traffic is also monitored, included all TLS-secured traffic where the developers hadn’t used certificate pinning (i.e., most apps). most apps).

Systems 74

Systems Traffic Network Google 74

All Things Distributed

NOVEMBER 21, 2017

As the use cases for Redis continue to grow, customers have demanded more flexibility in scaling their workloads dynamically, while continuing to be highly available and serving incoming traffic.

Games 96

Games Retail Latency Education 96

The Morning Paper

JULY 4, 2019

They use a combination of timeouts, retries, and fallbacks to try to mitigate the effects of these failures, but these don’t get exercised as often as the happy path, so how can we be confident they’ll work as intended when called upon? If ChAP detects excessive customer impact during an experiment, the experiment is stopped immediately.

Latency 77

Latency Engineering Metrics Traffic 77

The Agile Manager

JUNE 30, 2021

Labor's power in America arguably peaked in the 1960s and has been on the wane since, the striking Air Traffic Controllers getting fired in the early 80s often held out as a seminal moment in labor's multi-decade decline. And, per the aforementioned statistics, labor is exercising that power. Well, labor is back.

Social Media 52

Social Media Retail Media Software Engineering 52

Adrian Cockcroft

NOVEMBER 11, 2019

There are many possible failure modes, and each exercises a different aspect of resilience. They could freak out after a small drop in traffic caused by customers deciding to watch the Superbowl on TV and take an action before it is needed. A resilient system continues to operate successfully in the presence of failures.

Latency 53

Latency Systems Engineering Hardware 53

Adrian Cockcroft

NOVEMBER 11, 2019

There are many possible failure modes, and each exercises a different aspect of resilience. They could freak out after a small drop in traffic caused by customers deciding to watch the Superbowl on TV and take an action before it is needed. A resilient system continues to operate successfully in the presence of failures.

Latency 52

Latency Systems Engineering Hardware 52

The Agile Manager

NOVEMBER 30, 2020

These can be useful exercises, certainly to the business leaders who’ve got to find their customers or compete against rivals with slimmed down cost structures. COVID may turn out to be the greatest global catalyst of socio-economic change since the middle of the 20th century. These are less useful. The Big Questions are too big.

Airlines 52

Airlines Retail C++ Transportation 52

Speed Curve

MARCH 5, 2023

Background For this new investigation, I selected four sites that experience a significant amount of user traffic. In this post, I'll show how to use your own data to find the plateau for your site, and then what to do with your new insights.

Performance 52

Performance C++ Metrics Ecommerce 52

The Agile Manager

MARCH 31, 2017

Buying became an exercise in sourcing for the lowest unit cost any vendor was willing to supply for a particular skill-set. Selling became a race to the bottom in pricing. In this way, tech labor was cast as a utility, like the indistinguishible breakfast bar mentioned above.

Innovation 40

Innovation Energy Serverless Games 40

SQL Performance

JUNE 10, 2020

Even if you don’t end up with bugs, you could end up generating unnecessary network traffic by returning columns that the application doesn’t really need. Now this could be a really interesting exercise in patients to hit F5 repeatedly until you get two different values. The application could end up with bugs.

C++ 109

C++ Database Servers Code 109

John McCalpin

AUGUST 1, 2018

This is an intellectually challenging and labor-intensive exercise, requiring detailed review of the published details of each of the components of the system, and usually requiring significant “detective work” (using customized microbenchmarks, hardware performance counter analysis, and creative thinking) to fill in the gaps.

Hardware 40

Hardware Transportation Performance Latency 40

John McCalpin

AUGUST 1, 2018

This is an intellectually challenging and labor-intensive exercise, requiring detailed review of the published details of each of the components of the system, and usually requiring significant “detective work” (using customized microbenchmarks, hardware performance counter analysis, and creative thinking) to fill in the gaps.

Hardware 40

Hardware Transportation Performance Latency 40

SQL Performance

JUNE 10, 2020

Even if you don’t end up with bugs, you could end up generating unnecessary network traffic by returning columns that the application doesn’t really need. Now this could be a really interesting exercise in patients to hit F5 repeatedly until you get two different values. The application could end up with bugs.

C++ 93

C++ Database Servers Code 93

SQL Server According to Bob

FEBRUARY 10, 2019

I started with a cmd file script exercising the connection path. Running along and all the sudden no traffic occurring at the SQL Server for a few seconds, then stress kicked back in. The following is a simple query for looking at the rate of login and logouts the test is accomplishing. drop table #before go drop table #after go.

Servers 40

Servers Network Database Systems 40

The Agile Manager

FEBRUARY 28, 2017

For example, ghost code - code that is not commented out but will conditionally never be executed - is likely to be confused for real code in a reverse-engineering exercise. A clone of something extinct - our lost business knowledge - runs the risk of suffering severe defects. The facts are fantastic to have, but facts are not knowledge.

Strategy 40

Strategy Java Code Systems 40

The Morning Paper

OCTOBER 8, 2019

It wasn’t a wasted exercise though: The value of the whole exercise was that it validated that the entire NN pipeline was production ready and capable of serving live traffic. It proved neutral on booking performance when compared with the previous GBDT model. Don’t be a hero, in the beginning.

Network 82

Network Architecture Tuning Traffic 82

The Netflix TechBlog

OCTOBER 21, 2019

A few noteworthy examples include: Realtime monitoring of Netflix streaming health which examines all of Netflix’s streaming video traffic in realtime and accurately identifies negative impact on the viewing experience with fine-grained granularity.

Open Source 154

Open Source Metrics Engineering Processing 154

The Netflix TechBlog

OCTOBER 21, 2019

A few noteworthy examples include: Realtime monitoring of Netflix streaming health which examines all of Netflix’s streaming video traffic in realtime and accurately identifies negative impact on the viewing experience with fine-grained granularity.

Open Source 102

Open Source Metrics Engineering Processing 102

The Netflix TechBlog

OCTOBER 21, 2019

A few noteworthy examples include: Realtime monitoring of Netflix streaming health which examines all of Netflix’s streaming video traffic in realtime and accurately identifies negative impact on the viewing experience with fine-grained granularity.

Open Source 100

Open Source Metrics Engineering Processing 100