The Netflix TechBlog
NOVEMBER 12, 2019
Page Simulation for Better Offline Metrics at Netflix by David Gevorkyan , Mehmet Yilmaz , Ajinkya More , Gaurav Agrawal , Richard Wellington , Vivek Kaushal , Prasanna Padmanabhan , Justin Basilico At Netflix, we spend a lot of effort to make it easy for our members to find content they will love. To make this happen, we personalize many aspects of our service, including which movies and TV shows we present on each member’s homepage.
DZone
NOVEMBER 25, 2019
Send me.your location. You may also like: Localhost: the Cinderella of IP Addresses. Your website may look different to people belonging to different geolocations! Is it important to perform geolocation testing? Absolutely! Geolocation testing is a practice where you perform website testing from a set of IPs that belong to different countries around the globe.
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Dynatrace
NOVEMBER 5, 2019
Dynatrace news. We’ve been marketing AI as a key differentiator for nearly five years at Dynatrace. Problem is, these days everyone else is too – making it even harder to figure out if your message is getting through. And, to make matters worse, the technical audience we market to are skeptical of marketing jargon, which means, no matter what us marketers say – they probably won’t believe it anyway.
Scalegrid
NOVEMBER 20, 2019
By having appropriate indexes on your MySQL tables, you can greatly enhance the performance of SELECT queries. But, did you know that adding indexes to your tables in itself is an expensive operation, and may take a long time to complete depending on the size of your tables? During this time, you are also likely to experience a degraded performance of queries as your system resources are busy in index-creation work as well.
Uber Engineering
NOVEMBER 26, 2019
When something goes wrong with a piece of code, engineers want to know all the relevant details of the error immediately so they can get right to work remedying the malfunction. . However, as technology has advanced, measuring system metrics and … The post Optimizing Observability with Jaeger, M3, and XYS at Uber appeared first on Uber Engineering Blog.
The Morning Paper
NOVEMBER 28, 2019
TLA+ model checking made symbolic Konnov et al., OOPSLA’19. TLA+ is a formal specification language ( T emporal L ogic of A ctions) particularly well suited to reasoning about distributed algorithms. In addition to the specification language, the TLA+ toolset includes a model checker (TLC) and a theorem prover (TLAPS). Given the huge state spaces involved in many real-world settings, the TLC model checker can take a long time / a lot of resources to run.
The Netflix TechBlog
NOVEMBER 22, 2019
by Shefali Vyas Dalal AWS re:Invent is a couple weeks away and our engineers & leaders are thrilled to be in attendance yet again this year! Please stop by our “Living Room” for an opportunity to connect or reconnect with Netflixers. We’ve compiled our speaking events below so you know what we’ve been working on. We look forward to seeing you there!
Technology Performance Pulse brings together the best content for technology performance professionals from the widest variety of industry thought leaders.
Dynatrace
NOVEMBER 4, 2019
Dynatrace news. Organizations seeking ways to capitalize on the cloud computing delivery model also look to shorten development cycles without sacrificing superior user experience. In order to accomplish this, one of the key strategies many organizations utilize is an open source Kubernetes environment, which helps build, deliver, and scale containerized Cloud Native applications.
Scalegrid
NOVEMBER 25, 2019
ScyllaDB is an open-source distributed NoSQL data store, reimplemented from the popular Apache Cassandra database. Released just four years ago in 2015, Scylla has averaged over 220% year-over-year growth in popularity according to DB-Engines. We’ve heard a lot about this rising database from the DBA community and our users, and decided to become a sponsor for this years Scylla Summit to learn more about the deployment trends from its users.
Sutter's Mill
NOVEMBER 9, 2019
A few minutes ago, the ISO C++ committee completed its autumn meeting in Belfast, Northern Ireland, hosted with thanks by clearpool.io, Archer-Yates, Microsoft, C++ Alliance, MCS Group, Instil, and the Standard C++ Foundation. As usual, we met for six days Monday through Saturday, and we had about 200 attendees. We now have 23 active subgroups, most of which met in nine parallel tracks all week long; some groups ran all week, and others ran for a few days or a part of a day, depending on their w
The Morning Paper
NOVEMBER 24, 2019
Mergeable replicated data types Kaki et al., OOPSLA’19. This paper was published at OOPSLA, but perhaps it’s amongst the distributed systems community that I expect there to be the greatest interest. Mergeable Replicated Data Types (MRDTs) are in the same spirit as CRDTs but with the very interesting property that they compose. Furthermore, a principled approach for deriving MRDTs is provided, allowing a wide range of data-types to be lifted to their mergeable, replicated counterparts with
The Netflix TechBlog
NOVEMBER 22, 2019
by Shefali Vyas Dalal AWS re:Invent is a couple weeks away and our engineers & leaders are thrilled to be in attendance yet again this year! Please stop by our “Living Room” for an opportunity to connect or reconnect with Netflixers. We’ve compiled our speaking events below so you know what we’ve been working on. We look forward to seeing you there!
DZone
NOVEMBER 25, 2019
Monitor and profile your Spring Boot application! You may also like: Monitoring Using Spring Boot 2.0, Prometheus, and Grafana (Part 1 — REST API). Monitoring is very essential for modern applications, modern applications are highly distributed in nature and have different dependencies like database, service, caching and many more. It’s more of a like service mesh, tracing and monitoring these services are very essential to adhere to SLA ( S ervice L evel A greement).
Dynatrace
NOVEMBER 18, 2019
Dynatrace news. Imagine a situation where you have 1,000 hosts to monitor. Regardless of how awesome the default settings are, at some stage, you’ll want to change the configuration of some of these hosts. For example, you might want Dynatrace to treat a group of hosts in a load-balancer environment as a single virtual host. This is possible via the host-group feature, but until recently, required a full OneAgent installation.
Scalegrid
NOVEMBER 12, 2019
The past several years have seen increasing adoption for PostgreSQL. PostgreSQL is an amazing relational database. Feature-wise, it is up there with the best, if not the best. There are many things I love about it – PL/ PG SQL, smart defaults, replication (that actually works out of the box), and an active and vibrant open source community. However, beyond just the features, there are other important aspects of a database that need to be considered.
SQL Performance
NOVEMBER 13, 2019
The ROW_NUMBER window function has numerous practical applications, well beyond just the obvious ranking needs. Most of the time, when you compute row numbers, you need to compute them based on some order, and you provide the desired ordering specification in the function's window order clause. However, there are cases where you need to compute row numbers in no particular order; in other words, based on nondeterministic order.
The Morning Paper
NOVEMBER 3, 2019
An analysis of performance evolution of Linux’s core operations Ren et al., SOSP’19. I was drawn in by the headline results here: This paper presents an analysis of how Linux’s performance has evolved over the past seven years… To our surprise, the study shows that the performance of many core operations has worsened or fluctuated significantly over the years.
O'Reilly
NOVEMBER 7, 2019
In this interview from O’Reilly Foo Camp 2019, Programming Bitcoin author Jimmy Song talks about why Bitcoin is a profound invention, the impact it’s already having on society, and its path to monetary relevance. Highlights from the interview include: In the physical world, we have centralized and decentralized scarcity—think numbered prints from artists (centralized) versus gold or salt or glass beads (decentralized).
DZone
NOVEMBER 26, 2019
Wait.what is Monkey Testing? You may also like: Introduction to the World of Mobile Application Testing. What Is Monkey Testing? Android Monkey is the python-based testing script process that can be run by writing any specific python script or we can directly apply a test for the installed application using the command line. Once the test process will be done then it will generate a log file of the events and crash if any.
Dynatrace
NOVEMBER 5, 2019
Dynatrace news. With the increase in the adoption of cloud technologies, there’s now a huge demand for monitoring cloud-native applications, including monitoring both the cloud platform and the applications themselves. Many cloud providers offer built-in monitoring tools for transparency and easy management of resources, which begs the question “Why do I need add-on monitoring tools?
SQL Shack
NOVEMBER 25, 2019
In an article, An overview of the SQL table variable, we explored the usage of SQL table variables in SQL Server in comparison with a temporary table. Let’s have a quick recap of the table variable: We can define a table variable and use it similar to a temporary table with few differences. The table […].
Kovair
NOVEMBER 25, 2019
Enterprises are going through decisive digital transformation to achieve speed and accuracy to stay ahead of the market. With the evolution of digital technologies at.
The Morning Paper
NOVEMBER 26, 2019
Mergeable replicated data types – part II Kaki et al., OOPLSA ’19. Last time out we saw how Mergeable Replicated Data Types (MRDTs) use a bijection between the natural domain of a data type and relational sets to define merge semantics between two concurrently modified versions given their lowest common ancestor (LCA). Today we’re picking things up in §4 of the paper, starting with how to derive a merge function for an arbitrary data type.
O'Reilly
NOVEMBER 12, 2019
For the inaugural O’Reilly survey on serverless architecture adoption, we were pleasantly surprised at the high level of response: more than 1,500 respondents from a wide range of locations, companies, and industries participated. The high response rate tells us that serverless is garnering significant mindshare in the community. 1. Key findings from the survey include: 40% of respondents work at organizations that have adopted serverless architecture in some form or another.
DZone
NOVEMBER 24, 2019
Learn more about mobile app security tools. You may also like: Mobile App Security: Best Practices for App Developers. List of Top 10 Mobile App Security Testing Tools. Quick Android Review Kit. Zed Attack Proxy. Drozer (MWR InfoSecurity). MobSF (Mobile Security Framework). Android Debug Bridge. Micro Focus (Fortify). CodifiedSecurity. WhiteHat Security.
Dynatrace
NOVEMBER 6, 2019
Dynatrace news. Java. Added support for Oracle Hotspot JVM 13 for Linux, Alpine Linux 64-bit (x86), Solaris (x86), Windows (x86). Added support for Oracle Hotspot JVM 13 for Solaris (SPARC). Go. Added support for Go 1.13 for Linux, Alpine Linux 64-bit (x86), Windows (x86). PHP. Added support for PHP 7.4 for Linux, Alpine Linux 64-bit (x86), Windows (x86).
Uber Engineering
NOVEMBER 19, 2019
A restaurant’s menu is arguably its most important feature. When ordering online or via the app with Uber Eats, potential customers can’t peer in through a restaurant’s windows or smell the scents wafting from their kitchens, so digital menus become … The post Introducing Menu Maker: Uber Eats’ New Menu Management Tool appeared first on Uber Engineering Blog.
SQL Performance
NOVEMBER 22, 2019
Introduction. An Eager Index Spool reads all rows from its child operator into an indexed worktable, before it starts returning rows to its parent operator. In some respects, an eager index spool is the ultimate missing index suggestion , but it is not reported as such. Cost assessment. Inserting rows into an indexed worktable is relatively low-cost, but not free.
The Morning Paper
NOVEMBER 10, 2019
Snap: a microkernel approach to host networking Marty et al., SOSP’19. This paper describes the networking stack, Snap , that has been running in production at Google for the last three years+. 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.
O'Reilly
NOVEMBER 21, 2019
In a classic 1983 paper , cognitive psychologist Lisanne Bainbridge drew attention to a curious irony: so-called “automated” systems were, in practice, usually attended by one or more human operators. The more advanced the system, she observed, “the more crucial…the contribution of the human operator.” Bainbridge believed that automation designers were in denial about this, however.
DZone
NOVEMBER 14, 2019
Spring chickens and spring boots! One of the widely wasted resources in the world today is Memory. Due to inefficient programming, a surprising (sometimes ‘shocking’) amount of memory is wasted. We see this pattern repeated in several enterprise applications. To prove this case, we conducted a small study.
Dynatrace
NOVEMBER 4, 2019
Dynatrace news. Single sign-on (SSO) gives your employees the ability to log in just once with a set of credentials that enable them to access all corporate applications, websites, and data for which they have permission. In this way, SSO solves key problems for enterprises by providing greater security, compliance, as well as improved usability and employee satisfaction.
TechBeacon Testing
NOVEMBER 11, 2019
I often work with clients who are either just beginning, or trying to grow, their test automation capabilities, and more often than not they all make the same, fatal mistakes.
Kovair
NOVEMBER 13, 2019
2020 is certainly going to push the Information Technology industry to greater heights. Hence, the advancement in all engineering fields including the software is sure.
The Morning Paper
NOVEMBER 19, 2019
Local-first software: you own your data, in spite of the cloud Kleppmann et al., Onward! ’19. Watch out! If you start reading this paper you could be lost for hours following all the interesting links and ideas, and end up even more dissatisfied than you already are with the state of software today. You might also be inspired to help work towards a better future.
SQL Performance
NOVEMBER 18, 2019
Migrating an on-premises SQL Server instance to an Azure Virtual Machine (VM) is a common method to migrate to Azure. IT professionals are familiar with scoping the size of VMs with regards to vCPU, memory, and storage capacity. Microsoft offers multiple VM types and sizes for an organization's needs. You'll see the types referenced as Family in the Azure Portal when sizing a VM.
DZone
NOVEMBER 8, 2019
Tools and frameworks, just for you! In every web app, the frontend is the face of the application that is visible to users. It includes the graphical user interface, functionality, and usability of the site. If the front-end is not working properly, you will not be able to earn potential users for your website. That’s why performing frontend testing for your web app is very crucial.
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