Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. Ford, et al., “TCP

Performance 103

Performance Latency Cache Virtualization 103

Brendan Gregg

SEPTEMBER 5, 2017

Here's some output from my zfsdist tool, in bcc/BPF, which measures ZFS latency as a histogram on Linux: # zfsdist. Tracing ZFS operation latency. But there's another factor at play: jobs are also migrating from both Solaris and Linux to cloud jobs instead, specifically AWS. Hit Ctrl-C to end. ^C

Virtualization 75

Virtualization AWS Engineering Hardware 75

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. The change was obvious in the production graphs, showing a drop in write latencies: Once tested more broadly, it showed the write latencies dropped by 43%, delivering slightly better performance than on CentOS.

Speed 103

Speed Java AWS Virtualization 103

All Things Distributed

OCTOBER 2, 2017

As we began growing the AWS business, we realized that external customers might find our Dynamo database just as useful as we found it within Amazon.com. So, we set out to build a fully hosted AWS database service based upon the original Dynamo design. million requests per second.

Internet 110

Internet Internet AWS Performance 110

Brendan Gregg

JULY 4, 2021

It's an exciting time for developments in computer performance, not just for the BPF technology (which I often [write about]) but also for processors with 3D stacking and cloud vendor CPUs (e.g., Ford, et al., “TCP on Upcoming Sapphire Rapids CPUs,” [link] Oct 2020 - [Liu 20] Linda Liu, “Samsung QVO vs EVO vs PRO: What’s the Difference?

Performance 52

Performance Latency Hardware Storage 52

Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. Ford, et al., “TCP

Performance 52

Performance Latency Cache Virtualization 52

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. The change was obvious in the production graphs, showing a drop in write latencies: Once tested more broadly, it showed the write latencies dropped by 43%, delivering slightly better performance than on CentOS.

Speed 40

Speed Java AWS Virtualization 40

The Symphonia

MAY 22, 2018

Gojko Adzic has done some great speaking and writing on his experience here, and I included the link to his talk from late 2017. I also rewrote the section on Startup Latency since Cold Starts are one of the big “FUD” areas of Serverless. and products like AWS Fargate have made this distinction murkier still.

Serverless 40

Serverless Architecture Lambda Azure 40

All Things Distributed

NOVEMBER 5, 2015

Yesterday, AWS evangelist Jeff Barr wrote that AWS will be opening a region in South Korea in early 2016 that will be our 5th region in Asia Pacific. The AWS UK region will be our third in the European Union (EU), and we're shooting to have it ready by the end of 2016 (or early 2017).

AWS 167

AWS Retail Entertainment IoT 167

All Things Distributed

SEPTEMBER 29, 2016

Today, I am very excited to announce our plans to open a new AWS Region in France! Based in the Paris area, the region will provide even lower latency and will allow users who want to store their content in datacenters in France to easily do so. The new region in France will be ready for customers to use in 2017.

AWS 158

AWS IoT Internet Internet 158

Smashing Magazine

JANUARY 7, 2019

Estimated Input Latency tells us if we are hitting that threshold, and ideally, it should be below 50ms. Brotli is widely supported, and many CDNs support it ( Akamai , AWS , KeyCDN , Fastly , Cloudlare , CDN77 ) and you can enable Brotli even on CDNs that don’t support it yet (with a service worker). Bundle Buddy. Bundlephobia.

Performance 111

Performance Cache Network Metrics 111