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 233

Latency Cache Java Traffic 233

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. Perform pg_upgrade Execute the pg_upgrade process. to PostgreSQL v15.4. and a v15.4.

Database 76

Database Traffic C++ Servers 76

Speed Curve

MARCH 5, 2023

Background For this new investigation, I selected four sites that experience a significant amount of user traffic. Fortunately, the process for identifying the low end of your site’s performance threshold is fairly straightforward. You need to look at your own real user data. (If

Performance 119

Performance C++ Metrics Ecommerce 119

Dynatrace

MAY 28, 2020

While Google’s SRE Handbook mostly focuses on the production use case for SLIs/SLOs, Keptn is “Shifting-Left” this approach and using SLIs/SLOs to enforce Quality Gates as part of your progressive delivery process. This will enable deep monitoring of those Java,NET, Node, processes as well as your web servers.

Engineering 187

Engineering Performance Metrics Best Practices 187

Speed Curve

MARCH 5, 2023

Background For this new investigation, I selected four sites that experience a significant amount of user traffic. Fortunately, the process for identifying the low end of your site’s performance threshold is fairly straightforward. You need to look at your own real user data. (If

Performance 52

Performance C++ Metrics Ecommerce 52

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

Adrian Cockcroft

NOVEMBER 11, 2019

There are many possible failure modes, and each exercises a different aspect of resilience. Staff should be familiar with recovery processes and the behavior of the system when it’s working hard to mitigate failures. A resilient system continues to operate successfully in the presence of failures.

Latency 52

Latency Engineering Systems Hardware 52

Adrian Cockcroft

NOVEMBER 11, 2019

There are many possible failure modes, and each exercises a different aspect of resilience. Staff should be familiar with recovery processes and the behavior of the system when it’s working hard to mitigate failures. A resilient system continues to operate successfully in the presence of failures.

Latency 53

Latency Engineering Systems Hardware 53

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. But the ability to study, process, absorb, investigate and prove ways of exploiting heretofore unrealizable opportunities is priceless. These are less useful.

Airlines 52

Airlines Retail C++ Transportation 52

Dynatrace

SEPTEMBER 20, 2019

Here’s what we discussed so far: In Part 1 we explored how DevOps teams can prevent a process crash from taking down services across an organization. In doing so, they automate build processes to speed up delivery, and minimize human involvement to prevent error. Response time for blue/green environment traffic.

Systems 26

Systems Traffic DevOps Database 26

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. We look to process and organization, coaches and rules. We're not a few coaches and a little bit of process removed from salvation. Selling became a race to the bottom in pricing.

Innovation 40

Innovation Energy Serverless Hardware 40

SQL Performance

JUNE 10, 2020

This month and the next I’m going to cover the physical processing aspects of derived tables. That is, does SQL Server perform a substitution process whereby it converts the original nested code into one query that goes directly against the base tables? And if so, is there a way to instruct SQL Server to avoid this unnesting process?

C++ 109

C++ Database Servers Code 109

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. If the login was in the middle of processing pre-login the ring buffer entry may show time spent in SSL, reads, etc and the disconnect. ·

Servers 40

Servers Network Database Systems 40

SQL Performance

JUNE 10, 2020

This month and the next I’m going to cover the physical processing aspects of derived tables. That is, does SQL Server perform a substitution process whereby it converts the original nested code into one query that goes directly against the base tables? And if so, is there a way to instruct SQL Server to avoid this unnesting process?

C++ 93

C++ Database Servers Code 93

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

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 128

Internet Internet AWS Performance 128

All Things Distributed

NOVEMBER 21, 2017

Amazon ElastiCache embodies much of what makes fast data a reality for customers looking to process high volume data at incredible rates, faster than traditional databases can manage. Developers love the performance, simplicity, and in-memory capabilities of Redis, making it among the most popular NoSQL key-value stores.

Games 112

Games Retail Latency Education 112

The Netflix TechBlog

OCTOBER 21, 2019

Where other systems may take over ten minutes to process metrics accurately, Mantis reduces that from tens of minutes down to seconds, effectively reducing our Mean-Time-To-Detect. Instead, we should process and serve events one at a time as they arrive. Operational use cases are inherently time sensitive by nature.

Open Source 148

Open Source Metrics Engineering Processing 148

The Netflix TechBlog

OCTOBER 21, 2019

Where other systems may take over ten minutes to process metrics accurately, Mantis reduces that from tens of minutes down to seconds, effectively reducing our Mean-Time-To-Detect. Instead, we should process and serve events one at a time as they arrive. Operational use cases are inherently time sensitive by nature.

Open Source 101

Open Source Metrics Engineering Processing 101

The Netflix TechBlog

OCTOBER 21, 2019

Where other systems may take over ten minutes to process metrics accurately, Mantis reduces that from tens of minutes down to seconds, effectively reducing our Mean-Time-To-Detect. Instead, we should process and serve events one at a time as they arrive. Operational use cases are inherently time sensitive by nature.

Open Source 100

Open Source Metrics Engineering Processing 100