Dynatrace

JUNE 27, 2022

However, not all user monitoring systems are created equal. Synthetic monitoring is well suited for catching regressions during development lifecycles, especially with network throttling. These development and testing practices ensure the performance of critical applications and resources to deliver loyalty-building user experiences.

Best Practices 244

Best Practices Monitoring Wireless Traffic 244

The Morning Paper

MARCH 15, 2020

Understanding, detecting and localizing partial failures in large system software , Lou et al., Partial failures ( gray failures ) occur when some but not all of the functionalities of a system are broken. Here are the key findings: Partial failures appear throughout the release history of each system, 54% within the last three years.

Systems 98

Systems Software Software Programming 98

Dynatrace

SEPTEMBER 30, 2021

Hosted and moderated by Amazon, AWS GameDay is a hands-on, collaborative, gamified learning exercise for applying AWS services and cloud skills to real-world scenarios. AWS Certified Advanced Networking – Specialty: Very experienced networking professionals who are also proficient in AWS can benefit from getting this certification.

AWS 246

AWS Best Practices Cloud Analytics 246

Dynatrace

APRIL 21, 2022

Using a data-driven approach to size Azure resources, Dynatrace OneAgent captures host metrics out-of-the-box to assess CPU, memory, and network utilization on a VM host. Once you have and understand this data, you can identify issues, find opportunities for improvement, and eliminate risks before you go through a costly migration exercise.

Azure 246

Azure Monitoring Virtualization Metrics 246

Dynatrace

JUNE 1, 2023

It represents the percentage of time a system or service is expected to be accessible and functioning correctly. Response time Response time refers to the total time it takes for a system to process a request or complete an operation. This SLO enables a smooth and uninterrupted exercise-tracking experience.

Traffic 173

Traffic Website Latency DevOps 173

The Netflix TechBlog

SEPTEMBER 10, 2024

Sample system diagram for an Alexa voice command. Where aws ends and the internet begins is an exercise left to the reader. The other main use case was RENO, the Rapid Event Notification System mentioned above. Dynomite had great performance, but it required manual scaling as the system grew.

Latency 234

Latency Cache Tuning Efficiency 234

The Morning Paper

SEPTEMBER 24, 2019

50 ways to leak your data: an exploration of apps’ circumvention of the Android permissions system Reardon et al., Side-channels are typically an unintentional consequence of a complicated system. Each app was then executed on a physical mobile phone equipped with a custom OS and network monitor. USENIX Security Symposium 2019.

Systems 74

Systems Traffic Network Google 74

Dynatrace

JUNE 1, 2021

Practitioners use APM to ensure system availability, optimize service performance and response times, and improve user experiences. Causes can run the gamut — from coding errors to database slowdowns to hosting or network performance issues. Mobile apps, websites, and business applications are typical use cases for monitoring.

Monitoring 165

Monitoring Mobile Social Media Open Source 165

O'Reilly

AUGUST 13, 2024

“That’s what GPS says”—well, GPS is usually right, but I have seen GPS systems tell me to go the wrong way down a one-way street. In many ways, we’ve come to think of computers and computing systems as oracles. Creativity comes from the bottom up, starting with the basics: the underlying machine and network.

Social Media 125

Social Media Media Games Innovation 125

All Things Distributed

NOVEMBER 15, 2010

Werner Vogels weblog on building scalable and robust distributed systems. Now that our ability to generate higher and higher clock rates has stalled and CPU architectural improvements have shifted focus towards multiple cores, we see that it is becoming harder to efficiently use these computer systems. All Things Distributed.

AWS 125

AWS Programming Latency Architecture 125

All Things Distributed

OCTOBER 2, 2017

With these requirements in mind, and a willingness to question the status quo, a small group of distributed systems experts came together and designed a horizontally scalable distributed database that would scale out for both reads and writes to meet the long-term needs of our business. This was the genesis of the Amazon Dynamo database.

Internet 111

Internet Internet AWS Performance 111

O'Reilly

JANUARY 17, 2023

You might say that the outcome of this exercise is a performant predictive model. Second, this exercise in model-building was … rather tedious? If a problem calls for a shiny new technique, or a large, branching neural network, someone on your team needs to handle that. That’s sort of true. Your Job Has Changed.

Tuning 145

Tuning Open Source Software Software 145

The Morning Paper

APRIL 16, 2019

Teaching rigorous distributed systems with efficient model checking Michael et al., It describes the labs environment, DSLabs , developed at the University of Washington to accompany a course in distributed systems. Enabling students to build running performant versions of all of those systems in the time available is one challenge.

Systems 43

Systems Efficiency Testing Design 43

Percona

AUGUST 30, 2023

This can be changed later using the pg_checksums utility, but that will be a painful exercise on a big database. cat /usr/lib/systemd/system/postgresql-14.service. That is where all “ALTER SYSTEM SET/RESET” commands keep the information. But another database might be an OLAP system.

Database 120

Database Servers Open Source Tuning 120

MachMetrics

DECEMBER 12, 2019

Google has announced plans for a new badging system that would let users know whether a website typically loads slowly. Most stemmed from Google exercising too much power with this move. By taking feedback from other users and developers, Google can implement a system that will grow in a positive manner.

Google 86

Google Website Best Practices Internet 86

Percona

DECEMBER 5, 2023

Certainly, you can take advantage of this when you work with a large data set, and the initial copy could lead to long timeframes or network saturation. The scenario Service considerations In this exercise, we wanted to perform a major version upgrade from PostgreSQL v12.16 to PostgreSQL v15.4.

Database 103

Database Traffic C++ Servers 103

HammerDB

APRIL 19, 2023

Instead, focus on understanding what the workloads exercise to help us determine how to best use them to aid our performance assessment. Therefore, before we attempt to measure our database performance, we should know the system or cloud instance to be tested in detail. Operating System: Ubuntu 22.04 Operating System: Ubuntu 22.04

Performance 55

Performance Benchmarking Cache Storage 55

The Morning Paper

JULY 4, 2019

Are you ready to take your system assurance programme to the next level? In all cases we need to be able to carefully monitor the impact on the system, and back out if things start going badly wrong. Netflix’s system is deployed on the public cloud as complex set of interacting microservices.

Latency 77

Latency Engineering Metrics Traffic 77

Smashing Magazine

DECEMBER 2, 2021

With Advent of Cyber , you can get started with Cyber Security by learning the basics and completing a new, beginner friendly security exercise every day. With the goals of sharing, openness and mentoring, you’re in for some great articles about systems administration topics written by fellow sysadmins. Advent of Cyber. Bekk Christmas.

Design 120

Design Development Programming Website 120

Smashing Magazine

AUGUST 19, 2021

Many may not be familiar with other specific protections such as Customer Network Proprietary Information (CPNI) which safeguards the type, quantity, configuration, or location of telecommunications and interconnected services you use. Each team member gets a dot and is allowed to cast their vote to either group or keep separate.

Code 143

Code Design Education Government 143

Particular Software

DECEMBER 9, 2019

Decommissioning Public102 was an exercise in the mundane, gradually transitioning tiny service after tiny service to new homes over the course of weeks, as the development schedule allowed. Unfortunately, the network operations had a cruel surprise for us. You create a new server with the same software and add it to the load balancer.

Wireless 52

Wireless DevOps Infrastructure Network 52

Brendan Gregg

JUNE 30, 2018

sounds like a homework exercise of purely academic value. I've refuted many benchmarks by showing that they would require a network throughput that would far exceed the maximum network bandwidth (off by, for example, as much as 10x!). Networking is the easiest to check. This is really asking "what's the limiter?"

Benchmarking 47

Benchmarking Latency Cache Network 47

Brendan Gregg

DECEMBER 21, 2019

You can.but if you're looking for an educational exercise, I'd recommend using BPF tools to find performance wins. Miller (networking maintainer) recently asked if I still used my "noisy typewriter," which I had turned on a little too loud during a [LISA 2016] demo. bpftrace became even more powerful on Linux 5.3,

C++ 52

C++ Education Java AWS 52

Brendan Gregg

DECEMBER 21, 2019

You can.but if you're looking for an educational exercise, I'd recommend using BPF tools to find performance wins. Miller (networking maintainer) recently asked if I still used my "noisy typewriter," which I had turned on a little too loud during a [LISA 2016] demo. bpftrace became even more powerful on Linux 5.3,

C++ 52

C++ Education Java AWS 52

Adrian Cockcroft

NOVEMBER 11, 2019

A resilient system continues to operate successfully in the presence of failures. There are many possible failure modes, and each exercises a different aspect of resilience. Hence, one way to reduce risk is to make systems more observable. This discussion focuses on hardware, software and operational failure modes.

Latency 53

Latency Systems Engineering Hardware 53

Adrian Cockcroft

NOVEMBER 11, 2019

A resilient system continues to operate successfully in the presence of failures. There are many possible failure modes, and each exercises a different aspect of resilience. Hence, one way to reduce risk is to make systems more observable. This discussion focuses on hardware, software and operational failure modes.

Latency 52

Latency Systems Engineering Hardware 52

The Morning Paper

DECEMBER 8, 2019

At the start of November I was privileged to attend HPTS (the High Performance Transaction Systems) conference in Asilomar. Byte-addressable non-volatile memory,) NVM will fundamentally change the way hardware interacts, the way operating systems are designed, and the way applications operate on data. PLOS’19.

Hardware 56

Hardware Programming Media Storage 56

Tech News Gather

JUNE 15, 2023

In addition, it can also inculcate resources such as articles, podcasts, and breathing exercises to help users develop coping strategies and resilience. Users can access interactive maps, trail recommendations, and educational content highlighting ecological systems, biodiversity, and conservation efforts.

Education 52

Education Virtualization Innovation Transportation 52

Brendan Gregg

JUNE 29, 2018

sounds like a homework exercise of purely academic value. I've refuted many benchmarks by showing that they would require a network throughput that would far exceed the maximum network bandwidth (off by, for example, as much as 10x!). Networking is the easiest to check. This is really asking "what's the limiter?"

Benchmarking 40

Benchmarking Latency Cache Network 40

Alex Russell

AUGUST 30, 2021

Does Apple restrict, in any way, the ability of competing web browsers to deploy their own web browsing engines when running on Apple's operating system? Some engines go further, adopting safer systems languages in their first lines of defence, or using a larger number of sandboxes to strictly isolate individual websites from each other.

Engineering 112

Engineering Open Source Website Operating System 112

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

The Morning Paper

NOVEMBER 14, 2019

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. For example, balance utilisation across all data centers, or optimise for network latency. SOSP’19.

Traffic 42

Traffic Internet Internet Latency 42

SQL Server According to Bob

FEBRUARY 10, 2019

Several event types are included in the health session, some of which include predicates to remove noise from the system health session. The events logged in the system health show a non-yield beginning, then a login timeout occurring and the non-yield ending. Network Trace. Network Layer Overloaded. – sqlclr.

Servers 40

Servers Network Database Systems 40

Alex Russell

SEPTEMBER 20, 2020

New low-end devices are 4-to-8 core, 2GHz systems with 2GiB of RAM. Portable, safe apps returned massive benefits to users who no longer needed to LARP as systems administrators. Apple's defenders offer contradictory arguments: Browsers are essential to modern operating systems, and so iOS includes a good browser.

Hardware 71

Hardware Mobile Programming Java 71

SQL Performance

JUNE 10, 2020

Unlike the conceptual treatment of the data which is based on a mathematical model and a standard language, and hence is very similar in the various relational database management systems out there, the physical treatment of the data is not based on any standard, and hence tends to be very platform-specific. Figure 5: Plan for Query 5.

C++ 109

C++ Database Servers Code 109

SQL Performance

JUNE 10, 2020

Unlike the conceptual treatment of the data which is based on a mathematical model and a standard language, and hence is very similar in the various relational database management systems out there, the physical treatment of the data is not based on any standard, and hence tends to be very platform-specific. Figure 5: Plan for Query 5.

C++ 93

C++ Database Servers Code 93