Brendan Gregg

OCTOBER 8, 2018

Screenshot: tracing read latency for PID 181: # bpftrace -e 'kprobe:vfs_read /pid == 30153/ { @start[tid] = nsecs; } kretprobe:vfs_read /@start[tid]/ { @ns = hist(nsecs - @start[tid]); delete(@start[tid]); }'. Syscall count by program bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }'. I wrote seeksize.d

C++ 110

C++ Virtualization Programming Latency 110

Brendan Gregg

OCTOBER 7, 2018

Screenshot: tracing read latency for PID 181: # bpftrace -e 'kprobe:vfs_read /pid == 30153/ { @start[tid] = nsecs; } kretprobe:vfs_read /@start[tid]/ { @ns = hist(nsecs - @start[tid]); delete(@start[tid]); }'. Syscall count by program bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }'. I wrote seeksize.d

C++ 40

C++ Virtualization Programming Latency 40

All Things Distributed

OCTOBER 25, 2018

The new AWS Africa (Cape Town) Region will have three Availability Zones and provide lower latency to end users across Sub-Saharan Africa. AWS has been an active member of the local technology community since 2004. Hyrax has developed an AWS based technology called Exatype, which rapidly and accurately tests HIV drug resistance.

AWS 167

AWS Cloud Education Programming 167

Smashing Magazine

AUGUST 20, 2021

Fast-forward 30 years, and website technology has changed significantly — we have images, stylesheets, JavaScript, streaming video, AJAX, animation, WebSockets, WebGL, rounded corners in CSS — the list goes on. Nanoc removed the UI and is instead a program you run on the command line. MovableType really was before its time.

Ecommerce 139

Ecommerce Website Government Internet 139

SQL Server According to Bob

JANUARY 11, 2020

Microsoft SQL Server I/O Basics Author: ​​ Bob Dorr, Microsoft SQL Server Escalation Published: ​​ December, 2004 SUMMARY: ​​ Learn the I/O requirements for Microsoft SQL Server database file operations. © ​​ 2004 Microsoft Corporation. ​​ All rights reserved.

Servers 40

Servers Cache Media Hardware 40

SQL Server According to Bob

JANUARY 11, 2020

​​ The larger sector sizes involve newer technology and require API changes at the operating system level. The caching of data pages and grouping of log records helps remove much, if not all, of the command latency associated with a write operation.

Servers 40

Servers Cache Database Media 40