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

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. How would you time time?

Speed 52

Speed Java AWS Virtualization 52

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. How would you _time_ time?

Speed 40

Speed Java AWS Virtualization 40

Brendan Gregg

AUGUST 29, 2021

1072-aws (xxx) 12/18/2018 _x86_64_ (16 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 5.03 biolatency From [bcc], this eBPF tool shows a latency histogram of disk I/O. 1072-aws (xxx) 12/19/2018 _x86_64_ (16 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 12.25 avg-cpu: %user %nice %system %iowait %steal %idle 14.81

Cache 105

Cache C++ AWS Latency 105

All Things Distributed

OCTOBER 25, 2018

Expanding the AWS Cloud—An AWS Region is coming to South Africa! Today, I am excited to announce our plans to open a new AWS Region in South Africa! AWS is committed to South Africa's transformation. This news marks the 23rd AWS Region that we have announced globally. We have a long history in South Africa.

AWS 167

AWS Cloud Education Programming 167

Brendan Gregg

AUGUST 29, 2021

1072-aws (xxx) 12/18/2018 _x86_64_ (16 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 5.03 biolatency From [bcc], this eBPF tool shows a latency histogram of disk I/O. 1072-aws (xxx) 12/19/2018 _x86_64_ (16 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 12.25 avg-cpu: %user %nice %system %iowait %steal %idle 14.81

Cache 40

Cache C++ AWS Systems 40

All Things Distributed

APRIL 4, 2017

Today, I am very excited to announce our plans to open a new AWS Region in the Nordics! The new region will give Nordic-based businesses, government organisations, non-profits, and global companies with customers in the Nordics, the ability to leverage the AWS technology infrastructure from data centers in Sweden.

AWS 116

AWS Airlines Latency Games 116

All Things Distributed

DECEMBER 12, 2018

In April 2017, Amazon Web Services announced that it would launch a new AWS infrastructure region Region in Sweden. Today, I'm happy to announce that the AWS Europe (Stockholm) Region, our 20th Region globally, is now generally available for use by customers. Public sector.

AWS 124

AWS Cloud Games Serverless 124

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 76

Virtualization AWS Engineering Hardware 76

All Things Distributed

JULY 20, 2015

This architecture affords Amazon ECS high availability, low latency, and high throughput because the data store is never pessimistically locked. As you can see, the latency remains relatively jitter-free despite large fluctuations in the cluster size. Hailo was founded in 2011 and has been built on AWS since Day 1.

Latency 166

Latency Architecture AWS Open Source 166