The Netflix TechBlog

JUNE 14, 2023

Before GraphQL: Monolithic Falcor API implemented and maintained by the API Team Before moving to GraphQL, our API layer consisted of a monolithic server built with Falcor. A single API team maintained both the Java implementation of the Falcor framework and the API Server. To launch Phase 1 safely, we used AB Testing.

Traffic 355

Traffic Latency Metrics Cache 355

Dynatrace

DECEMBER 13, 2024

The following is a sample Instrumentation resource definition for a Python service: apiVersion: opentelemetry.io/v1alpha1 inject-python: "true" spec: containers: - name: py-otel-server image: otel-python-lab:0.1.0-py-otel-server inject-python: "true" spec: containers: - name: py-otel-server image: otel-python-lab:0.1.0-py-otel-server

Java 246

Java Servers Code Metrics 246

Percona

DECEMBER 13, 2024

Over the last few years, there have been many calls to evolve the Open Source Definition (OSD) to fit the modern world. Some would like to seenoncompetitive licenses such as the Server Side Public License (SSPL) or Elastic License considered open source.

Open Source 76

Open Source Software Software Servers 76

Dynatrace

MAY 12, 2022

The title size of a tile has been moved from the dashboard definition to the dashboard metadata definition and included in the advanced settings UI for dashboards. Fixed an issue with “500 Internal Server Error” response of Anomaly detection – Disk events API. (APM-370270). Dashboards. Dynatrace API.

Tuning 246

Tuning Metrics Cloud Mobile 246

DZone

MARCH 24, 2021

We typically understand software testing by the everyday definition of the word: making sure a piece of software performs the way it is supposed to in a production-like environment. The first category would fall under integration testing, and you definitely need that. Or is there? If so, the database is updated.

Testing 200

Testing Design Software Performance Database 200

Percona

NOVEMBER 1, 2023

MySQL Server – Community Edition The problem applies to all versions of the upstream MySQL Community up to 8.0.23. Here is an example scenario you may end up here: mysql > select @@version,@@version_comment; + --+ + | @@version | @@version_comment | + --+ + | 5.7.43 | MySQL Community Server (GPL) | + --+ + 1 row in set (0.00

Servers 103

Servers Database Cache C++ 103

Dynatrace

FEBRUARY 14, 2022

Multiple Prometheus servers might be required, creating significant maintenance efforts. Alternatively, if you’re already using a Prometheus Server to gather data from your distributed systems, you can now seamlessly make this data work for you in Dynatrace as well—use your Prometheus server as the endpoint for scraping metrics.

Technology 246

Technology Technology Metrics Infrastructure 246

Dynatrace

NOVEMBER 2, 2020

IT infrastructure is the heart of your digital business and connects every area – physical and virtual servers, storage, databases, networks, cloud services. This shift requires infrastructure monitoring to ensure all your components work together across applications, operating systems, storage, servers, virtualization, and more.

Infrastructure 246

Infrastructure Monitoring Virtualization Serverless 246

Dynatrace

NOVEMBER 30, 2023

When we look at the combined tests above, the average server-side response time (measured as first byte time, or the amount of time it takes to get the first packet of data in response to a request) is 397 milliseconds. This type of issue would definitely affect conversion rates on a retail site.

Retail 278

Retail Social Media Performance Benchmarking 278

DZone

JANUARY 29, 2021

It is mainly the channel that links the client to the server, drives business procedures, and gives the services which give worth to users. Application Programming Interface acts as the center level between the database and presentation layer in the software development procedure. What is API Test?

Testing 214

Testing Programming Performance Database 214

Percona

OCTOBER 10, 2023

Why choose Percona Server for MongoDB? The difference between Percona Server for MongoDB and MongoDB CE is that we strive to provide a gap-closing set of features for users who want to use MongoDB in production. Why release Percona Server for MongoDB 7 now? which was released as Percona Server for MongoDB RC 7.0.2-1.

Servers 106

Servers Availability Database Open Source 106

SQL Shack

SEPTEMBER 6, 2021

In this article, we will explore in detail the factors that cause SQL Server stored procedures to be recompiled. Introduction SQL Server Stored procedures are the make-ready T-SQL codes that can be executed again and again by the database users to perform data manipulation commands and data definition commands.

Servers 90

Servers Database Code Performance 90

The Netflix TechBlog

JULY 30, 2019

Adoption As of writing this blog, Conductor orchestrates 600+ workflow definitions owned by 50+ teams across Netflix. The task definition parameter rateLimitFrequencyInSeconds sets the duration window, while rateLimitPerFrequency defines the number of tasks that can be scheduled in a duration window.

Lambda 190

Lambda Media Open Source Metrics 190

Alex Podelko

AUGUST 18, 2019

Of course, more sophisticated tools may definitely do better job in creating a simple and intuitive interface (still providing a way to invoke more sophisticated functionality when needed). One of main challenges is definitely scripting and scripts fragility. But it doesn’t mean that we need tools with minimal functionality.

Performance Testing 243

Performance Testing Testing Performance Testing Tools 243

The Netflix TechBlog

SEPTEMBER 18, 2024

message IdempotencyToken ( Timestamp generation_time, String token ) At Netflix, client-generated monotonic tokens are preferred due to their reliability, especially in environments where network delays could impact server-side token generation. Either or both may be required by backing storage engines to de-duplicate mutations.

Latency 256

Latency Storage Cache Efficiency 256

Dynatrace

AUGUST 16, 2019

By definition RESTful APIs should be stateless, meaning that each request should be individually validated for authentication/authorization by the receiving server. Note that the word “authentication” hasn’t yet been mentioned. And why are we referring to OAuth while discussing APIs? This is the key.

Monitoring 199

Monitoring Tuning Google Testing 199

SQL Performance

AUGUST 2, 2019

I have been making the same recommendations about tempdb since I started working with SQL Server over 15 years ago, when I was working with customers running version 2000. From the customer side, this has been the limit of what can be done*, until SQL Server 2019. I have SQL Server 2019 CTP 3.2 Now that 2019 CTP 3.2

Servers 95

Servers C++ Testing Systems 95

Dynatrace

MAY 17, 2023

When software runs in a monolithic stack on on-site servers, observability is manageable enough. For the HTTP request, we add the request headers we sent, as well as certain details from the response, such as the status code, the length of the response, and server information.

Metrics 245

Metrics Open Source Traffic Cache 245

The Netflix TechBlog

FEBRUARY 9, 2021

The API server orchestrates backend systems to authenticate the user. Upon successful authentication of the claims provided, the API server sends a cookie response back upstream, including the customerId (a Long), the ESN (a String) and an expiration directive. Zuul redirects the user call to the API /login endpoint.

Architecture 225

Architecture Latency Servers Systems 225

Dynatrace

DECEMBER 15, 2022

Typically, these are streamed to a central syslog server. One option is to install OneAgent on that syslog server, which automatically discovers, instruments and sends the log data to the Dynatrace platform. Syslog is a popular standard for transporting and Ingesting log messages. Ingest AWS Fargate logs with Fluent Bit.

Strategy 245

Strategy AWS Open Source Transportation 245

The Netflix TechBlog

AUGUST 22, 2019

The configuration file, referenced scripts, and artifact dependency definitions all live in an internal git repository. Running a canary for each change and testing the AMI in production allows us to capture insights around impact on Windows updates, script changes, tuning web server configuration, among others.

DevOps 209

DevOps AWS Tuning Infrastructure 209

The Netflix TechBlog

FEBRUARY 3, 2021

Instead, the schema gets generated at runtime based on definitions in code. Fitting into the GraphQL Server Ecosystem So how exactly does the DGS framework fit into the existing GraphQL ecosystem? When it comes to building GraphQL servers using JVM, there are both schema-first and code-first libraries available.

Open Source 246

Open Source Java Architecture Metrics 246

The Netflix TechBlog

NOVEMBER 4, 2019

By batching and parallelizing the requests to retrieve many creatives via a single query to the GraphQL server, we can optimize the index building process. At a minimum, we extract all of the type definitions from the GraphQL query and map them to a schema for Elasticsearch to use. The graph has two requirements. Search Indexer.

Cache 243

Cache Database Servers Performance 243

Dynatrace

AUGUST 12, 2019

With OneAgent installed on an application server, Davis, the Dynatrace AI causation engine, continuously analyzes all database statements within the context of your applications. With additional data from the database server, you’ll be able to resolve performance problems that are rooted deep in the database layer.

Database 170

Database Metrics Cache Servers 170

CSS Wizardry

DECEMBER 9, 2023

Connection overhead isn’t huge , but too many preconnect s that either a) aren’t critical, or b) don’t get used at all, is definitely wasteful. Further, opening and persisting connections has a CPU overhead on both the client and the server.

Speed 283

Speed Network Analytics Availability 283

Dynatrace

JULY 11, 2023

IBM Power servers enable customers to respond faster to business demands, protect data from core to cloud, and streamline insights and automation. Dynatrace webhook server validates Dynakube definitions for correctness.

Architecture 189

Architecture Availability Infrastructure Monitoring 189

Dynatrace

NOVEMBER 3, 2021

Monitoring , by textbook definition, is the process of collecting, analyzing, and using information to track a program’s progress toward reaching its objectives and to guide management decisions. Then we’ll look at how you can best utilize both to improve business outcomes. Monitoring vs. observability.

Monitoring 264

Monitoring Metrics DevOps Scalability 264

SQL Performance

JULY 19, 2022

The simplest definition of a log record: it describes a single change to a database. You can read a bit more about rollbacks in my article A Complete Introduction to SQL Server Transactions on the SentryOne blog, and I’ll cover them in depth in the next article. What Are Log Records? Log Record Types.

Servers 94

Servers Database Storage Engineering 94

Dynatrace

MAY 28, 2020

Keptn uses SLO definitions to automatically configure Dynatrace or Prometheus alerting rules. If you have a distributed environment with multiple servers hosting your webservers, app servers, and database, I suggest you install the OneAgent on all these servers to get full end-to-end visibility.

Engineering 270

Engineering Performance Metrics Best Practices 270

SQL Performance

APRIL 17, 2020

When we ask SQL Server to change some aspect of a column's definition, it needs to check that the existing data is compatible with the new definition. Rewrite some or all of the stored data to match the new definition. Improvements in SQL Server 2016. You get these undocumented improvements for free.

Servers 63

Servers Database Testing Efficiency 63

Percona

APRIL 4, 2023

Those are a lot more common and may be in your table definitions, so your upgrade process will be harder. If you try to use a reserved word, the server will not explicitly admonish you that you are trying to use a reserved word. Instead, the server informs you that you have a syntax error. Yes, there is a workaround.

Open Source 124

Open Source Database Servers Scalability 124

SQL Performance

SEPTEMBER 8, 2021

To understand the circumstances where you would want to use the CHECK OPTION as part of a view’s definition, we’ll first examine what can happen when you don’t use it. For years I used to think of the CHECK OPTION in a view as serving the same function as a CHECK constraint in a base table’s definition. CHECK OPTION. FastOrders.

Servers 130

Servers Code Engineering Database 130

Scalegrid

JANUARY 20, 2020

If your application passes on the test dataset, it is definitely fit to deploy in production! Here are the two options we typically suggest: If the analytics job is running on the primary/master server, move it to a secondary/replica server. Data Analytics.

Analytics 185

Analytics Database Storage Systems 185

Dynatrace

JULY 15, 2024

into NAM test definitions. To help you enjoy a new and more powerful solution, we’re launching a tool that facilitates the automatic transformation of your existing extensions based on EF1.0 Our script, available on GitHub , provides details. NAM monitors are defined in a similar manner to other synthetic monitors.

Availability 246

Availability Network Monitoring Infrastructure 246

CSS Wizardry

AUGUST 24, 2022

Browsers (and, to an extent, servers) use priorities to decide how and when they request certain files. In order to get a better view on the impact of what I was changing, one needs a little understanding of what priorities are and what Priority Hints do. one can’t just whack async on a and hope for the best).

Benchmarking 256

Benchmarking Metrics Cache Network 256

Dynatrace

JULY 10, 2019

OneAgents are optimized to send data to the Dynatrace servers with the smallest possible impact, querying the metrics every minute, and the data is a first-class citizen for the Dynatrace AI root-cause analysis. To do this you will have to run a script that retrieves the desired metrics, which are then ingested through the Dynatrace API.

Java 197

Java Best Practices Metrics Azure 197

SQL Performance

AUGUST 23, 2019

In traditional row-mode execution plans, SQL Server may introduce a Bitmap operator as part of performing early semi join reduction before a parallel hash or merge join. There have been major improvements since the first appearance of the batch mode execution engine in SQL Server 2012. Background. The Query Optimizer. Bitmap Choice.

Servers 75

Servers Engineering Efficiency Retail 75