Sutter's Mill

MAY 20, 2020

A few minutes ago, I announced to the ISO C++ committee that all our meetings originally planned for 2020 have been postponed. It still feels surreal that in just one week from now we would all have been traveling to Bulgaria for the first meeting of C++23. But that was in a different world, and reality and facts matter.

C++ 75

C++ Virtualization Monitoring Development 75

Sutter's Mill

MARCH 13, 2020

Yesterday morning, I announced to the committee that the next ISO WG21 (C++) meeting originally planned for June 1-6 in Varna, Bulgaria, has been postponed due to the current health situation. We all love C++, but our first priority is the health and safety of all of our experts and observers, all of our families, and of the global community.

C++ 75

C++ Government Virtualization Monitoring 75

The Netflix TechBlog

NOVEMBER 9, 2022

While we understand it’s virtually impossible to achieve a linear increase in throughput as the number of vCPUs grow, a near-linear increase is attainable. Conclusion We tend to think of modern JVMs as highly optimized runtime environments, in many cases rivaling more “performance-oriented” languages like C++.

Hardware 363

Hardware Cache Performance Latency 363

HammerDB

DECEMBER 10, 2024

More than ever, we see confusion in interpreting and comparing the performance of databases with workloads derived from the TPC-Council’s TPC-C specification, including HammerDB’s TPROC-C NOPM and TPM. Importantly, TPC-C and tpmC are registered trademarks of the TPC-Council.

C++ 58

C++ Benchmarking Hardware Performance 58

The Netflix TechBlog

OCTOBER 14, 2024

Upon closely examining the user’s Notebook, we noticed a library called pystan , which provides Python bindings to a native C++ library called stan, looked suspicious. You will notice a do-while loop that is linear to the virtual memory area. Naturally, you would think that there must be something wrong with the code running in it.

Latency 210

Latency Virtualization Traffic Processing 210

Sutter's Mill

MAY 1, 2023

Simple, mathematically safe, and efficient chained comparisons ( commit ) P0515 “Consistent comparison” (aka “spaceship”) was the first feature derived from this Cpp2 work to be adopted into the ISO Standard for C++, in C++20. Thank you again to everyone who helped land this Cpp2 feature in the ISO C++ Standard.

C++ 97

C++ Virtualization Lambda Code 97

High Scalability

JULY 26, 2018

” Incredibly, this growth is largely the result of eXp Realty’s use of an online virtual world similar to Second Life. That means every employee, contractor, and the thousands of agents who work at the company show up to work—team meetings, training seminars, onboarding sessions—all inside a virtual reality campus.

Internet 124

Internet Internet Scalability Serverless 124

The Morning Paper

MAY 27, 2019

CheriABI: enforcing valid pointer provenance and minimizing pointer privilege in the POSIX C run-time environment Davis et al., And this all has to work for whole-system executions, not just the C-language portion of user processes. ASPLOS’19. The protections are hardware implemented and cannot be forged in software.

C++ 61

C++ Hardware Virtualization Benchmarking 61

HammerDB

JUNE 27, 2024

automates this practice by introducing the concept of performance profiles for TPROC-C workloads. This functionality available with both GUI and CLI enables you to group a number of related TPROC-C workloads together to build a profile across multiple benchmarks. HammerDB v4.11 Copy Code Copied Use a different Browser #!/bin/tclsh

C++ 52

C++ Performance Benchmarking Virtualization 52

The Netflix TechBlog

AUGUST 29, 2023

The abstractions that Eureka provides for this are Virtual IPs (VIPs) for insecure communication, and Secure VIPs (SVIPs) for secure. If service A needs to talk to clusters B and C, then you need to define clusters B and C as part of A’s proxy config.

Traffic 224

Traffic Latency Cloud C++ 224

HammerDB

JULY 6, 2024

Firstly, it is worth noting that both HammerDB TPROC-C and sysbench-tpcc run workloads based on the TPC-C specification, however as described here HammerDB is called TPROC-C to correctly comply with the TPC fair use rules. Prepare or build the schema Firstly, before running a workload, you need to build or prepare the schema.

C++ 52

C++ Hardware Benchmarking Virtualization 52

HammerDB

FEBRUARY 26, 2024

Many of the HammerDB TPROC-C workloads have included features to prevent the database doing maintenance tasks for the previous run whilst another run is taking place. This is particularly important when running automated workloads back-back to generate a performance profile for a progressively increasing number of virtual users.

C++ 63

C++ Cache Database Virtualization 63

Sutter's Mill

DECEMBER 30, 2020

That includes for the C++ committee and many of our communities, where just this month we lost Beman Dawes. Beman was one of the most important and influential C++ experts in the world, and made his many contributions mostly behind the scenes. First, the big one… C++20 is the first ever “D&E-complete” release of C++.

C++ 76

C++ Virtualization Design Code 76

Percona

MARCH 13, 2023

I prefer to test a distributed deployment where each component is placed on different servers or virtual machines, that’s why I do not put it into docker-compose. 6400'" -c "listen_http_addr='0.0.0.0:9898'" 9898'" -c "pg_distrib_dir='/opt/neondatabase-neon/pg_install'" 4.

Serverless 120

Serverless C++ Storage Servers 120

Percona

DECEMBER 20, 2023

Modern servers operate with terabytes of RAM, and by default, processors work with virtual memory address translation for each 4KB page. OS maintains a huge list of allocated and free pages to make slow but reliable address translation from virtual to physical. Huge pages make PostgreSQL faster; can we implement it in Kubernetes?

C++ 102

C++ Virtualization Benchmarking Database 102

Sutter's Mill

OCTOBER 3, 2019

JG Question Describe as many approaches as you can think of that could let us semi- or fully-automate this pattern, over just writing it by hand every time as recommended in C++ Core Guidelines #C.130. There are two basic approaches in today’s C++: the Curiously Recurring Template Pattern (a.k.a. "CRTP"),

C++ 75

C++ Virtualization Code Design 75

Dynatrace

MARCH 17, 2021

IAST only works with languages that have a virtual runtime environment, such as Java, C#, Python, and Node.js. Interactive (IAST) : IAST combines SAST and DAST together and improves on them by instrumenting applications to support deeper vulnerability analysis beyond exposed surfaces.

Open Source 167

Open Source Cloud Games Java 167

Dynatrace

APRIL 5, 2021

Azure is a large and growing cloud computing ecosystem that empowers its users to access databases, launch virtual servers, create websites or mobile applications, run a Kubernetes cluster, and train machine learning models, to name a few examples. Consider using virtual machines or specialized frameworks for these types of tasks.

Azure 137

Azure Serverless IoT Lambda 137

Brendan Gregg

JANUARY 1, 2019

eBPF should stand for something meaningful, like Virtual Kernel Instruction Set (VKIS), but due to its origins it is extended Berkeley Packet Filter. So instead of a static HTML website, JavaScript lets you define mini programs that run on events like mouse clicks, which are run in a safe virtual machine in the browser.

C++ 99

C++ Virtualization Programming Code 99

Sutter's Mill

OCTOBER 28, 2011

As I’m getting ready to resume writing a few new (or updated) Guru of the Week Items for the C++11 era, I’ve been looking through the wonderful features of C++11 and analyzing just which ones will affect the baseline style of how I write modern C++ code, both for myself and for publication.

C++ 40

C++ Virtualization Code Design 40

HammerDB

MARCH 25, 2023

Docker build, example CLI scripts were added to build and run the TPROC-C workload in the Tcl language. these were enhanced to also add Python based scripts, and to include scripts for both TPROC-C and TPROC-H and a driver script for Linux environments. With the HammerDB v4.5 In HammerDB v4.6 With HammerDB v4.7

C++ 84

C++ Virtualization Benchmarking Database 84

Dynatrace

JULY 13, 2020

These packages, known as container images, are immutable and because they abstract the environment on which they run, they ’re portable and can be moved from one environment to another , regardless of what platform it’s running on, i.e. a physical or virtual machine, on-premise, data center , or in the public cloud. .

Google 132

Google DevOps Ecommerce Cloud 132

Dynatrace

JULY 13, 2020

These packages, known as container images, are immutable and because they abstract the environment on which they run, they ’re portable and can be moved from one environment to another , regardless of what platform it’s running on, i.e. a physical or virtual machine, on-premise, data center , or in the public cloud. .

Google 130

Google DevOps Ecommerce Cloud 130

HammerDB

JULY 15, 2021

With the default workload, each Virtual User will process 90% of its transactions against its home warehouse selected at random at the start of the test. You should create a schema large enough to allow an even, uncontended, random distribution of Virtual Users for the maximum Virtual User count you will expect to create.

C++ 52

C++ Virtualization Database Testing 52

KeyCDN

FEBRUARY 22, 2023

Chatbots and virtual assistants Chatbots and virtual assistants are becoming more common on websites and web applications as they provide an efficient and convenient way for users to interact with a business. These technologies can answer questions, provide customer support, or even complete transactions.

Artificial Intelligence 111

Artificial Intelligence Development Serverless Website 111

Highly Scalable

FEBRUARY 2, 2012

Sometimes it is simply funny, sometimes it can be used to study VM internals without C++ code debugging, sometimes it can be leveraged for profiling and development tools. long allocateMemory(long bytes) which can be considered as a wrapper for C’s malloc(). Obtaining Unsafe. sizeof() Function. allocateMemory(size); getUnsafe().copyMemory(

Java 101

Java C++ Code Virtualization 101

HammerDB

JULY 5, 2022

So instead we are going to take a cut down version of the HammerDB TPROC-C driver script and do the same in Python and use the HammerDB infrastructure to measure performance. (We use stored procedures because, as the introductory post shows, using single SQL statements turns our database benchmark into a network test). usr/local/bin/tclsh8.6

Benchmarking 98

Benchmarking Database C++ Virtualization 98

HammerDB

DECEMBER 5, 2020

compared to previous releases is that the workload names have changed from TPC-C and TPC-H to TPROC-C and TPROC-H respectively and therefore a key question is how are the v4.0 The simple answer is nothing, the workloads are exactly the same workloads derived from the TPC-C and TPC-H specifications and HammerDB v4.0

C++ 40

C++ Benchmarking Virtualization Open Source 40

Percona

JUNE 5, 2023

Then, you can apply the code using this docker command on a server running the PMM Docker container (as root or using sudo): docker exec -it pmm-server bash -c 'curl -fsSL [link] | /bin/bash' If you are running PMM via a virtual appliance (OVF or AMI), use SSH to shell into the PMM server and run this command, as root or using sudo: curl -fsSL [link] (..)

Internet 93

Internet Internet Virtualization C++ 93

Brendan Gregg

OCTOBER 8, 2018

more capable, and built from the ground up for the modern era of the eBPF virtual machine. eBPF was created by Alexei Starovoitov while at PLUMgrid (he's now at Facebook) as a generic in-kernel virtual machine, with software defined networks as the primary use case. It's shaping up to be a DTrace version 2.0: Attaching 2 probes. ^C

C++ 105

C++ Virtualization Programming Latency 105

HammerDB

FEBRUARY 25, 2021

To benchmark a database we introduce the concept of a Virtual User. For HammerDB both TPROC-C and TPROC-H run all of their workloads on the database being tested in SQL. The following is an example from TPROC-C from SQL Server. TPROC-C however is derived from the TPC-C specification and requires application logic around the SQL.

Programming 68

Programming Benchmarking Virtualization C++ 68

Brendan Gregg

SEPTEMBER 25, 2021

CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. Note that Ubuntu also has a frame to show entry into vDSO (virtual dynamic shared object). As (C) looked like a kernel rebuild, I started with (D) and (E). ## 5. I also rewrote this in C and called gettimeofday(2) directly: $ cat gettimeofdaybench.c.

Speed 103

Speed Java AWS Virtualization 103

O'Reilly

FEBRUARY 18, 2020

there’s a Python library for virtually anything a developer or data scientist might need to do. But Go is now the sixth most-used programming language, trailing only Python, Java,NET, and C++. Along with R , Python is one of the most-used languages for data analysis. Interestingly, R itself continues to decline.

Software Architecture 136

Software Architecture DevOps Data Engineering Architecture 136

HammerDB

OCTOBER 17, 2018

The official TPC-C test has a fixed number of users per warehouse and uses keying and thinking time so that the workload generated by each user is not intensive. By default each virtual user has the concept of a home warehouses where approximately 75% of its workload will take place.

C++ 40

C++ Testing Virtualization Cache 40

HammerDB

NOVEMBER 23, 2021

dbset db pg dbset bm TPC-C diset tpcc pg_count_ware 20 diset tpcc pg_num_vu 4 diset tpcc pg_superuser postgres diset tpcc pg_superuserpass postgres buildschema. Running in the web service CLI we can see that the command output is returned to the user, however the virtual user output is no longer returned and instead a jobid is given.

Virtualization 71

Virtualization Benchmarking C++ Database 71

Adrian Cockcroft

FEBRUARY 9, 2023

The virtualization and networking platform could be datacenter based, with something like VMware, or cloud based using one of the cloud providers such as AWS EC2. The next layer is defined by the languages you want to use, Java, Python, Go, , Javascript, Rust etc, and the ecosystem of library functions you bought from a vendor or downloaded.

Engineering 137

Engineering Serverless Lambda AWS 137

Nick Desaulniers

APRIL 18, 2014

So a whole Babel of computer languages has been created for programmers: FORTRAN, BASIC, COBOL, LISP, Pascal, C, PROLOG, FORTH. This blog is meant for those who don’t know x86-64 assembly, but maybe know a little C, and are curious about code generation. But you never can tell exactly what the compiler is doing. Dan Gohman.

C++ 98

C++ Programming Code Virtualization 98