Percona

JUNE 22, 2023

Defining high availability In general terms, high availability refers to the continuous operation of a system with little to no interruption to end users in the event of hardware or software failures, power outages, or other disruptions. In addition to the disaster recovery site, this design includes an external layer of nodes.

Availability 103

Availability Database Open Source Hardware 103

Alex Russell

MARCH 6, 2021

The scale of the effect can be deeply situational or hard to suss out without solid metrics. A then-representative $200USD device had 4-8 slow (in-order, low-cache) cores, ~2GiB of RAM, and relatively slow MLC NAND flash storage. Hardware Past As Performance Prologue. The Moto G4 , for example. Mind The Gap.

Performance 124

Performance Network Cache Metrics 124

Smashing Magazine

JANUARY 11, 2021

LogRocket tracks key metrics, incl. Performance isn’t just a technical concern: it affects everything from accessibility to usability to search engine optimization, and when baking it into the workflow, design decisions have to be informed by their performance implications. Getting Ready: Planning And Metrics. Table Of Contents.

Performance 145

Performance Cache Media Metrics 145

Smashing Magazine

JANUARY 6, 2020

Performance isn’t just a technical concern: it affects everything from accessibility to usability to search engine optimization, and when baking it into the workflow, design decisions have to be informed by their performance implications. Getting Ready: Planning And Metrics. Getting Ready: Planning And Metrics. Quick Wins.

Performance 145

Performance Cache Network Metrics 145

The Morning Paper

MARCH 17, 2020

Applications and files systems access App Direct memory using CPU instructions offering a variety of options for controlling the ordering of store operations: cache-line flush, cache-line write back, and non-temporal stores (bypassing the cache hierarchy). Use non-temporal stores for large transfers, and control cache evictions.

Scalability 59

Scalability Latency Cache Media 59

Smashing Magazine

JANUARY 7, 2019

Performance isn’t just a technical concern: it matters, and when baking it into the workflow, design decisions have to be informed by their performance implications. Getting Ready: Planning And Metrics. Getting Ready: Planning And Metrics. Table Of Contents. Setting Realistic Goals. Defining The Environment. Build Optimizations.

Performance 105

Performance Cache Metrics Network 105

SQL Server According to Bob

JANUARY 11, 2020

Stable media is commonly physical disk storage, but other devices and certain caching facilities qualify as well. Many high-end disk subsystems provide high-speed cache facilities to reduce the latency of read and write operations. This cache is often supported by a battery-powered backup facility.

Servers 40

Servers Cache Media Hardware 40

Brendan Gregg

AUGUST 18, 2019

bpftrace is suited for this kind of analysis: decomposing metrics into distributions or per-event logs, and creating new metrics for visibility into blind spots. hardware Hardware counter-based instrumentation. There are often two modes, one for device cache hits and one for cache misses, which can be shown by this tool.

Latency 68

Latency C++ Cache Programming 68

Alex Russell

APRIL 29, 2021

Another window into this question is provided by the Web Confluence Metrics project. Apple's policy against browser engine choice adds years of delays beyond the (expected) delay of design iteration, specification authoring, and browser feature development. is access to hardware devices. Converging Views. Content Indexing.

Media 145

Media Games Education Engineering 145

Smashing Magazine

JANUARY 15, 2019

In 2013, A List Apart published Sustainable Web Design by James Christie. The key metric for measuring the sustainability of a digital product is its energy usage. how much data does the browser have to download to display your website) and resource usage of the hardware serving and receiving the website. Sustainable Web Design.

Website Performance 74

Website Performance Website Energy Performance 74

Smashing Magazine

JANUARY 21, 2021

Image source: Lighthouse Metrics ) ( Large preview ). We were designing and building things, setting up new products, refactoring the components, and publishing articles. Plus a service worker that caches all static assets and serves them for repeat views, along with cached versions of articles that a reader has already visited.

Performance 145

Performance Cache Mobile Network 145

Alex Russell

OCTOBER 22, 2017

This helps support executive sponsors who then have meaningful metrics to point to in justifying the investments being made. Very rarely have we seen a team succeed that doesn’t set budgets, gather RUM metrics, and carry representative customer devices. Teams with budgets also find it easier to track and graph progress.

Performance 68

Performance Benchmarking Network Mobile 68

SQL Performance

MARCH 8, 2021

This uses hardware, typically a crystal oscillator, that produces ticks at a very high constant rate regardless of processor speed, power settings, or anything of that nature. Total elapsed time is 933ms with 6,673ms of CPU time with a warm cache. How row mode metrics are collected. Alternate designs.

Servers 95

Servers Tuning Architecture Performance 95

Highly Scalable

AUGUST 20, 2013

This system has been designed to supplement and succeed the existing Hadoop-based system that had too high latency of data processing and too high maintenance costs. The design of the in-stream processing engine itself was driven by the following requirements: SQL-like functionality. Fault-tolerance. In-Stream Processing Patterns.

Big Data 154

Big Data Processing Lambda Database 154

Highly Scalable

SEPTEMBER 18, 2012

A database should accommodate itself to different data distributions, cluster topologies and hardware configurations. Data version can be specified by a timestamps or application-specific metric. Permanent redirection means that the client is able to cache the mapping between the shard and the node. Data Placement.

Database 213

Database Latency C++ Scalability 213

All Things Distributed

JANUARY 18, 2012

a Fast and Scalable NoSQL Database Service Designed for Internet Scale Applications. Today is a very exciting day as we release Amazon DynamoDB , a fast, highly reliable and cost-effective NoSQL database service designed for internet scale applications. Amazon DynamoDB â?? By Werner Vogels on 18 January 2012 07:00 AM. Comments ().

Scalability 167

Scalability Database Ecommerce Latency 167

Smashing Magazine

AUGUST 22, 2021

For web-page loading, this slow-start approach can also affect metrics such as the first contentful paint, because only a small amount of data (tens of to a few hundred KB) can be transferred in the first few round trips. Examples include repeat visits on well-cached pages and background downloads and API calls in single-page apps.

Performance 107

Performance Network Latency Servers 107

High Scalability

NOVEMBER 25, 2019

To help our customers manage ongoing data explosion, we have designed many of the core components over the last few years. Edge caching. In general, Egnyte connect architecture shards and caches data at different levels based on: Amount of data. Nginx for disk based caching. Disk based caching. Hybrid Sync.

Architecture 52

Architecture Cache Azure Storage 52