All Things Distributed

OCTOBER 25, 2013

In the back to basics readings this week I am re-reading a paper from 1995 about the work that I did together with Thorsten on solving the problem of end-to-end low-latency communication on high-speed networks. The lack of low-latency made that distributed systems (e.g.

Network 96

Network Latency Operating System Speed 96

Dynatrace

JUNE 25, 2020

Dynatrace Managed is intrinsically highly available as it stores three copies of all events, user sessions, and metrics across its cluster nodes. This means that Dynatrace continues full operation when a majority of nodes are up and a maximum of two nodes are down at a time. Dynatrace news. Minimized cross-data center network traffic.

Availability 246

Availability Hardware Latency Traffic 246

Testsigma

DECEMBER 12, 2020

Let alone browsers, the website may get into trouble for different resolutions, different operating systems and different browser versions too!! Cross-browser testing deals with all those things by running the websites on different browsers, their versions, operating systems and on different resolutions.

Testing 53

Testing Operating System Website Latency 53

ScaleOut Software

APRIL 6, 2021

Because it runs on a scalable, highly available in-memory computing platform, it can do all this simultaneously for hundreds of thousands or even millions of data sources. This simplifies the installation process and ensures portability across operating systems.

IoT 52

IoT Azure Analytics Healthcare 52

SQL Performance

FEBRUARY 26, 2020

Azure SQL Database Managed Instance became generally available in late 2018. Organizations are taking advantage of having managed backups, lots of built-in security features, an uptime SLA of 99.99%, and an always up-to-date environment where they are no longer responsible for patching SQL Server or the operating system.

Azure 63

Azure Performance Storage Latency 63

Scalegrid

DECEMBER 21, 2023

Identifying key Redis® metrics such as latency, CPU usage, and memory metrics is crucial for effective Redis monitoring. With these essential support systems in place, you can effectively monitor your databases with up-to-date data about their health and functioning status at all times.

Strategy 130

Strategy Monitoring Latency DevOps 130

cdemi

DECEMBER 4, 2016

Maximizing Availability : Delays or Downtime of the service does not affect the application generating the messages. Message Brokers are servers that take care of Queue Handling , Routing Messages, High Availability and Scaling out. Maximizing Scalability : Number of Queues and Services can be varied to meet Demand.

Design 47

Design Azure Scalability Latency 47

Dynatrace

AUGUST 25, 2023

These signals ( latency, traffic, errors, and saturation ) provide a solid means of proactively monitoring operative systems via SLOs and tracking business success. SLOs, as a measure of service quality, can track the related availability, reliability, and performance. This is what Dynatrace captures as response time.

Performance 173

Performance Latency Traffic Metrics 173

HammerDB

MAY 5, 2019

However in the Skylake microarchitecture (you can see a list of CPUs here ) the PAUSE instruction changed and in the documentation it says “the latency of the PAUSE instruction in prior generation microarchitectures is about 10 cycles, whereas in Skylake microarchitecture it has been extended to as many as 140 cycles.”

Testing 48

Testing Tuning Latency Storage 48

O'Reilly

DECEMBER 2, 2019

I don’t need more bandwidth for video conferences or movies, but I would like to be able to download operating system updates and other large items in seconds rather than minutes. There are impressive estimates for latency for 5G, but reality has a tendency to be harsh on such predictions.

Wireless 53

Wireless Serverless IoT Artificial Intelligence 53

Dynatrace

JANUARY 14, 2022

However, setting the right parameters for Kubernetes clusters to ensure application availability, performance, and resilience while avoiding overspending isn’t a walk in the park. JVM, databases, middleware, operating system, cloud instances, etc) by also taking advantage of Dynatrace full-stack observability. lower than 2%.).

Latency 203

Latency Tuning Efficiency AWS 203

Scalegrid

FEBRUARY 8, 2024

Key Takeaways Distributed storage systems benefit organizations by enhancing data availability, fault tolerance, and system scalability, leading to cost savings from reduced hardware needs, energy consumption, and personnel. Variations within these storage systems are called distributed file systems.

Storage 130

Storage Systems Big Data Azure 130

Dynatrace

MAY 17, 2023

For that, we focused on OpenTelemetry as the underlying technology and showed how you can use the available SDKs and libraries to instrument applications across different languages and platforms. We’d like to get deeper insight into the host, the underlying operating system, and any third-party services used by our application.

Metrics 171

Metrics Monitoring Database Network 171

Dynatrace

JANUARY 26, 2021

Traditional computing models rely on virtual or physical machines, where each instance includes a complete operating system, CPU cycles, and memory. There is no need to plan for extra resources, update operating systems, or install frameworks. The provider is essentially your system administrator.

Serverless 243

Serverless Efficiency Lambda Azure 243

Percona

MARCH 23, 2023

Nowadays, solid-state drives (SSDs) or non-volatile memory express (NVMe) drives are preferred over traditional hard disk drives (HDDs) for database servers due to their faster read and write speeds, lower latency, and improved reliability. Operating system Linux is the most common operating system for high-performance MySQL servers.

Performance 128

Performance Hardware Tuning Storage 128

Scalegrid

JANUARY 12, 2024

Various forms can take shape when discussing workloads within the realm of cloud computing environments – examples include order management databases, collaboration tools, videoconferencing systems, virtual desktops, and disaster recovery mechanisms. Storage is a critical aspect to consider when working with cloud workloads.

Cloud 130

Cloud Virtualization Storage Efficiency 130

Smashing Magazine

OCTOBER 31, 2023

It may even be something you do regularly with Lighthouse in Chrome DevTools, where testing is freely available and produces a very attractive-looking report. CrUX is what fuels PSI and Google Search Console, but it is also available in other tools you may already use. Can’t be perfect every time! It’s right there in the name!

Speed 97

Speed Google Website Metrics 97

Adrian Cockcroft

JANUARY 20, 2023

To me this positions Fugaku as the first of a new mainstream, rather than a special purpose system. I have always been particularly interested in the interconnects and protocols used to create clusters, and the latency and bandwidth of the various offerings that are available.

Architecture 52

Architecture Latency Benchmarking AWS 52

Adrian Cockcroft

APRIL 5, 2023

This proposal seeks to define a standard for real-time carbon and energy data as time-series data that would be accessed alongside and synchronized with the existing throughput, utilization and latency metrics that are provided for the components and applications in computing environments.

Energy 52

Energy Metrics Cloud Operating System 52

Percona

APRIL 17, 2023

In this blog post, we will discuss the best practices on the MongoDB ecosystem applied at the Operating System (OS) and MongoDB levels. Note that the intent of tuning the settings is not exclusively about improving performance but also enhancing the high availability and resilience of the MongoDB database. 25.84 - Total 21.04

Best Practices 52

Best Practices Design Tuning Database 52

The Morning Paper

MAY 12, 2019

It’s a pretty impressive effort to pull together and make available in open source (not yet available as I write this) such a suite, and I’m sure explains much of the long list of 24 authors on this paper. The top line shows the change in tail latency across a set of monolithic applications as operating frequency decreases.

Open Source 61

Open Source Hardware Benchmarking Systems 61

John McCalpin

APRIL 2, 2020

All of the SPECfp_rate2000 results were downloaded from www.spec.org, the results were sorted by processor type, and “peak floating-point operations per cycle” was manually added for each processor type. This includes all architectures, all compilers, all operating systems, and all system configurations.

Benchmarking 59

Benchmarking Performance Latency Architecture 59

All Things Distributed

APRIL 9, 2015

Amazon ML uses powerful algorithms that can help you create machine learning models by finding patterns in existing data, and using these patterns to make predictions from new data as it becomes available. Amazon EFS is designed to be highly available and durable, storing each file system object redundantly across multiple Availability Zones.

Lambda 122

Lambda Cloud IoT AWS 122

Brendan Gregg

AUGUST 8, 2017

Nowadays, the source code to old operating systems can also be found online. For everyone familiar with other operating systems and their CPU load averages, including this state is at first deeply confusing. **Why?** One system with a ratio of 1.5 Latency was acceptable and no one complained.

Latency 111

Latency Metrics C++ Systems 111

All Things Distributed

OCTOBER 2, 2017

We were pushing the limits of what was a leading commercial database at the time and were unable to sustain the availability, scalability and performance needs that our growing Amazon business demanded. Durable and Highly-Available – DynamoDB maintains data durability and 99.99 This was the genesis of the Amazon Dynamo database.

Internet 128

Internet Internet AWS Performance 128

Percona

JULY 1, 2023

These may be performance, high availability, operational cost, management, capacity planning, scalability, security, monitoring, etc. There are also cases where although the workload and operational needs seem to best fit to one solution, there are other limiting factors that may be blockers (or at least need special handling).

AWS 52

AWS Database Serverless Storage 52

The Morning Paper

MAY 21, 2019

This boils down to a single digit µs latency toleration in the tail for far memory, and in addition to security and privacy concerns, rules out remote memory solutions. Zswap is readily available and runs as a swap device in the Linux kernel. Enter zswap! Google use zswap to implement their far memory tier.

Software 78

Software Software Google Hardware 78

All Things Distributed

MARCH 11, 2016

But we couldn’t adopt the old style approach of upgrading systems through a maintenance outage, as many businesses around the world are relying on our platform for 24/7 availability. This lowered latency more than 2x and delivered more than 10x improvement in latency variability on the network. Expect the unexpected.

AWS 144

AWS Hardware Retail Virtualization 144

Dotcom-Montior

NOVEMBER 24, 2021

Concurrency refers to the system’s ability to carry out multiple tasks in parallel and manage the access and usage of shared resources. A distributed system comprises of a variety of hardware and software components with different operating systems and technologies, meaning the processors are separate and independent of each other.

Systems 74

Systems Monitoring Hardware Network 74

The Morning Paper

APRIL 14, 2019

A covert cache-based channel (for example) can be built by the sender modulating its footprint in the cache through its execution, and the receiver probing this footprint by systematically touching cache lines and measuring memory latency and by observing its own execution speed. Threat scenarios. Threat scenarios.

Hardware 44

Hardware Cache Latency Speed 44

Adrian Cockcroft

NOVEMBER 11, 2019

Collecting some critical metrics at one second intervals, with a total observability latency of ten seconds or less matches the human attention span much better. If something fails, there should be another way for the system to succeed. This is why most AWS regions have three availability zones.

Latency 52

Latency Engineering Systems Hardware 52

Adrian Cockcroft

NOVEMBER 11, 2019

Collecting some critical metrics at one second intervals, with a total observability latency of ten seconds or less matches the human attention span much better. If something fails, there should be another way for the system to succeed. This is why most AWS regions have three availability zones.

Latency 53

Latency Engineering Systems Hardware 53

O'Reilly Software

APRIL 4, 2018

A message-oriented implementation requires an efficient messaging backbone that facilitates the exchange of data in a reliable and secure way with the lowest latency possible. When we work on a single machine, the operating system takes care of managing the resources allocated to applications.

Architecture 80

Architecture Scalability Google Operating System 80

SQL Server According to Bob

JANUARY 11, 2020

Subsystem / Path The ​​ I/O subsystem or path ​​ includes ​​ those ​​ components ​​ that are ​​ used to support an I/O operation.

Servers 40

Servers Cache Database Media 40

SQL Server According to Bob

JANUARY 11, 2020

Many high-end disk subsystems provide high-speed cache facilities to reduce the latency of read and write operations. These systems must maintain support for I/O ordering. SQL Server always checks I/O completion status for any operating system error conditions and proper data transfer size and then handles errors appropriately.

Servers 40

Servers Cache Media Hardware 40

John McCalpin

JULY 23, 2018

When running a single user thread, you will often get the advertised single-core Turbo frequency, but if the operating system enables more cores to handle (even very short-lived) background processes, your frequency may drop unexpectedly. RDTSCP can still be executed later than expected, but not earlier.

Code 45

Code Programming Latency Testing 45

ScaleOut Software

MAY 15, 2014

Likewise, object access paths must be heavily multi-threaded and avoid lock contention to minimize access latency and maximize throughput. We believe that installing our software should be as straightforward as we can make it, requiring minimal knowledge of the host operating system and the fewest possible explicit configuration settings.

Cache 40

Cache Servers Network Design 40