Alex Podelko

SEPTEMBER 8, 2020

It was called Jellly at the time (mid 2015) but it was an early build of what OctoPerf would become. That’s when we decided to go for a name that would first be available but also avoiding a “load-something” name (I know 10 of these, not even counting LoadRunner/NeoLoad) while integrating the notion of performance.

Open Source 223

Open Source Performance Testing Testing Performance 223

The Netflix TechBlog

DECEMBER 17, 2019

Andreas Andreakis , Ioannis Papapanagiotou Overview Change-Data-Capture (CDC) allows capturing committed changes from a database in real-time and propagating those changes to downstream consumers [1][2]. In databases like MySQL and PostgreSQL, transaction logs are the source of CDC events. Designed with High Availability in mind.

Database 212

Database Traffic Transportation Open Source 212

The Netflix TechBlog

DECEMBER 17, 2019

Andreas Andreakis , Ioannis Papapanagiotou Overview Change-Data-Capture (CDC) allows capturing committed changes from a database in real-time and propagating those changes to downstream consumers [1][2]. In databases like MySQL and PostgreSQL, transaction logs are the source of CDC events. Designed with High Availability in mind.

Database 197

Database Traffic Transportation Open Source 197

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. top(1) showed that only the Cassandra database was consuming CPU. Checking those available: $ cat /sys/devices/system/clocksource/clocksource0/available_clocksource. These can be invisible to top(8).

Speed 126

Speed Java AWS Virtualization 126

All Things Distributed

APRIL 4, 2017

The new AWS EU (Stockholm) Region will have three Availability Zones and will be ready for customers to use in 2018. As a result, we have opened 42 Availability Zones across 16 AWS Regions worldwide. In 2014 and 2015 respectively, AWS opened offices in Stockholm and Espoo, Finland. That’s 100% faster.

AWS 116

AWS Airlines Latency Games 116

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. top(1) showed that only the Cassandra database was consuming CPU. I also shared setting the clocksource in my talks and in my 2015 [Linux tunables] post. What on Earth is Ubuntu doing that results in 30% higher CPU time!?

Speed 40

Speed Java AWS Virtualization 40

Percona

JANUARY 17, 2019

On multi-core machines – which is the majority of the hardware nowadays – and in the cloud, we have multiple cores available for use. I’m using the “Airlines On-Time Performance” database from [link] (You can find the scripts I used here: [link] ). With faster disks (i.e. AWS Aurora (based on MySQL 5.6) MySQL on ec2.

Cache 46

Cache C++ AWS Airlines 46

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. top(1) showed that only the Cassandra database was consuming CPU. I also shared setting the clocksource in my talks and in my 2015 Linux tunables post. What on Earth is Ubuntu doing that results in 30% higher CPU time!?

Speed 52

Speed Java AWS Virtualization 52

Brendan Gregg

NOVEMBER 29, 2017

At Netflix, we've been using these technologies as they've been made available for instance types in the AWS EC2 cloud. But not all workloads: some are network bound (proxies) and storage bound (databases). ## 5. Xen AWS 2017 In 2015, AWS launched c4, which used hardware virtualization for EBS volumes. The first was c3.

Virtualization 111

Virtualization AWS Hardware Storage 111

Smashing Magazine

APRIL 1, 2020

We need a new breed of CMS — one that can make content available through any channel at which point a Headless CMS is required. The API makes contents available through any channel and on any device using most favorite tools and programming languages plus it also provides a higher level of security and much better scalability.

Open Source 103

Open Source Website Mobile Code 103

Enprowess

JANUARY 12, 2022

24*7 Availability : Chatbots are available 24×7 and can respond to your customer’s queries as fast as possible. Internet of things (IoT) – Number of IoT devices 2015-2025 Statista. A Directory of 24000 APIs is available on Programmableweb.com to integrate into any business application. Image Source. Smart cities.

Blockchain 59

Blockchain IoT Development Serverless 59

Brendan Gregg

NOVEMBER 28, 2017

At Netflix, we've been using these technologies as they've been made available for instance types in the AWS EC2 cloud. But not all workloads: some are network bound (proxies) and storage bound (databases). ## 5. Xen AWS 2017 In 2015, AWS launched c4, which used hardware virtualization for EBS volumes. The first was c3.

Virtualization 40

Virtualization AWS Hardware Storage 40

Alex Russell

MARCH 6, 2021

Devices and networks have evolved too: Alex Russell @slightlylate An update on mobile CPUs and the Performance Inequality Gap: Mid-tier Android devices (~$300) now get the single-core performance of a 2014 iPhone and the multi-core perf of a 2015 iPhone. Modern network performance and availability. Here begins our 2021 adventure.

Performance 124

Performance Network Cache Metrics 124

Smashing Magazine

JANUARY 6, 2020

Usually, the most specific and relevant ones are: Time to Interactive (TTI) The point at which layout has stabilized, key webfonts are visible, and the main thread is available enough to handle user input — basically the time mark when a user can interact with the UI. Other options are available , too. Assets Optimizations.

Performance 145

Performance Cache Network Metrics 145

Smashing Magazine

JANUARY 7, 2019

Time to Interactive (TTI) The point at which layout has stabilized, key webfonts are visible, and the main thread is available enough to handle user input — basically the time mark when a user can interact with the UI. Still, it’s not that difficult , and its support is coming, e.g. it’s available since Apache 2.4.26.

Performance 104

Performance Cache Metrics Network 104

Percona

JANUARY 14, 2019

What if we use ClickHouse (which is a columnar analytical database) as our main datastore? Well, typically, an analytical database is not a replacement for a transactional or key/value datastore. Although such databases can be very efficient with counts and averages, some queries will be slow or simply non existent. Text search.

Database 40

Database Analytics Blockchain Healthcare 40