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virtual DOMPerformance is top priority here at Wayfair, because improved performance means an improved customer experience. A significant piece of web performance is the time it takes to render, or generate, the markup for a page. Over the last several months we've worked hard to improve the render performance on our. Read more. Open Source Web Performance performance react.js tungsten tungsten.js MORE
In simple terms, virtual servers composed of multiple nodes and they communicate and share information through a distributed shared memory grid. Learn more about clustering with MuleSoft. What Is Clustering? Clustering is a group of servers or mule runtime which acts as a single unit. MORE
Zoom scaled from 20 million to 300 million users virtually over night. What's incredible is from the outside they've shown little in the way of apparent growing pains, though on the inside it's a good bet a lot of craziness is going on. MORE
The topic is Tungsten.js, our awesome framework that 'lights up' the DOM with fast, virtual-DOM-based updates, React-style, and can be integrated with Backbone.js There's a great interview with our own Matt DeGennaro by Paul Krill of Infoworld that came out a few days ago. and pretty much whatever other framework. Read more. Open Source Web Performance mustache php tungsten.js MORE
Hardware virtualization for cloud computing has come a long way, improving performance using technologies such as VT-x, SR-IOV, VT-d, NVMe, and APICv. It's an exciting development in cloud computing: hardware virtualization is now fast. MORE
Additionally, organizations can customize their Redis™ persistence and host through their own Azure account which allows them to leverage advanced cloud capabilities like Azure Virtual Networks (VNET), Security Groups, and Reserved Instances to reduce long-term hosting costs up to 60%. PALO ALTO, Calif., October 2, 2019 – ScaleGrid, a rapidly growing leader in the Database-as-a-Service (DBaaS) space, has just launched their new fully managed Hosting on Azure for Redis™ service. MORE
Additionally, organizations can customize their Redis persistence and host through their own Azure account which allows them to leverage advanced cloud capabilities like Azure Virtual Networks (VNET), Security Groups, and Reserved Instances to reduce long-term hosting costs up to 60%. PALO ALTO, Calif., October 2, 2019 – ScaleGrid, a rapidly growing leader in the Database-as-a-Service (DBaaS) space, has just launched their new fully managed Redis on Azure service. MORE
For our MongoDB Bring Your Own Cloud (BYOC) AWS deployments that are not open to the internet, this may mean selecting an instance that is allowed to connect to the Security Group and also has VPN connectivity to the Virtual Private Cloud (VPC). MORE
success": {"message": "Building 5 Warehouses with 6 Virtual Users, 5 active + 1 Monitor VU(dict value num_vu is set to 5): JOBID=5D23464E58D203E273738333"}}. HammerDB already has 2 interfaces with which to interface with the commands to build and test databases using the GUI interface or CLI. MORE
In the era of Digital Transformation (DX) the IT landscape has expanded to environments that rely extensively on virtualization, hyper-converged infrastructure (HCI), and cloud computing. As a result, the number of servers and the quantity of traffic have been exploding exponentially. MORE
When hypervisor management tools make clones of virtual machines, the tools usually make sure to create a unique MAC address for every clone. The post Duplicate IP issues with Linux and virtual machine cloning. cloud cloning linux virtualizationTL;DR – Some modern Linux distributions use a newer method of identification which, when combined with DHCP can result in duplicate IP addresses when cloning VMs, even when the VMs have unique MAC addresses. MORE
That’s true for virtually any programming language and platform. Something to test Java's performance. Managing an application’s performance, and specifically keeping it in good condition, is one of the hardest challenges in software development. MORE
Tenant isolation is achieved by provisioning a separate virtual warehouse (VW) for each tenant. A virtual warehouse comprises a set of compute nodes, and compute elasticity is achieved by adding or removing nodes on an on-demand basis. MORE
However most people use HammerDB with keying and thinking time disabled and therefore each virtual user can approximately drive the CPU resources of one CPU core on the database server. Therefore for the 100 virtual users 400 to 500 warehouses should be a minimum to be configured. MORE
Firecracker is the virtual machine monitor (VMM) that powers AWS Lambda and AWS Fargate, and has been used in production at AWS since 2018. General-purpose hypervisors and virtual machine monitors (VMMs) are also quite large, leading to a large trusted compute base (TCB). MORE
One important choice you will still have to make is what type and size of Azure virtual machine you want to use for your existing SQL Server workload. Microsoft currently has eight main types of virtual machines designed for different types of workloads. MORE
JMH is developed by the same people who implement the Java virtual machine (JVM) so they know the internals and how Java makes optimizations at run time. Measure Java performance! MORE
With Dynatrace Infrastructure Monitoring you get a complete solution for the monitoring of cloud platforms and virtual infrastructure, along with log monitoring and AIOps. Dynatrace news. MORE
DigitalOcean specialized in SSD-based virtual machines called Droplets that are broken down into four simple categories. MongoDB is the #3 open source database and the #1 NoSQL database in the world. It’s a cross-platform document-oriented database that uses JSON-like documents with schema, and is leveraged broadly across startup apps up to enterprise-level businesses developing modern apps. MORE
And software testing is being forced to be reinvented every day due to the introduction of new technologies like artificial intelligence, virtualization, and predictive analysis. MORE
This is a companion paper to the " persistent problem " piece that we looked at earlier this week, going a little deeper into the object pointer representation choices and the mapping of a virtual object space into physical address spaces. MORE
The answer to this challenge is service virtualization, which allows simulating real services during testing without actual access. Cloud and virtualization triggered appearance dynamic, auto-scaling architectures, which significantly impact getting and analyzing feedback. Due to virtualization system-level monitoring doesn’t help much anymore and may be misleading – so getting information from application and database servers becomes very important. MORE
Statiscal foundations of virtual democracy Kahng et al., The big idea behind virtual democracy is that we learn the voting preferences of each stakeholder, essentially creating an agent which is able to vote in their place, a virtual voter. Then when we need to make a decision we ask those virtual voters to cast their votes (in the form of a preference ranking). ICML’19. MORE
performance ci/cd firewall load balancer it operations network automation virtual appliance cloud data centers application delivery controller hybrid it MORE
We need a different approach for both because in the schema build we are waiting for all of the virtual users to finish (vwait forever), however for the driver we are waiting for a set period of time before terminating them. For the build I have created more warehouses but with 5 virtual users to show the multithreaded nature of the build. MORE
The Linux VM running postgres has two virtual disks – one taking transaction log writes. A quick look at how the workload is seen from the Nutanix CVM. In this example from prior post. The other is doing reads and writes from the main datafiles. MORE
PALO ALTO, Calif., June 6, 2019 – ScaleGrid , the Database-as-a-Service (DBaaS) leader in the SQL and NoSQL space, has announced the expansion of their fully managed MySQL Hosting services to support Amazon Web Services (AWS) cloud. MORE
Oddly slow virtual memory scanning of endlessly leaking CFG memory was causing gmail hangs for a while until we added a mitigation in Chrome’s JavaScript engine. I wrote a Python script that generated classes with virtual functions. 0 to 1,280,000 – one per virtual function. MORE
It is designed to run in specific environments, like Java Virtual Machine for instance. While both of these programming languages run on Java Virtual Machine, Scala code runs faster on this system for a number of reasons. Guest Post by Wendy Dessler. Source- Pixabay. MORE
In other words, a cluster is a virtual server composed of multiple nodes. Mule Enterprise Edition supports scalable clustering to provide high availability (HA) for applications. MORE
Migrating an on-premises SQL Server instance to an Azure Virtual Machine (VM) is a common method to migrate to Azure. Microsoft has helped simplify things by creating multiple types of virtual machines. High performance compute – Fastest and most powerful CPU virtual machines. MORE
Back-to-Basics Weekend Reading - Virtualizing Operating Systems. This weekends back-to-basics reading is on operating system virtualization. There are two papers that deserve the "classic" tag as they both form the basis for operating system virtualization that is in production today. Stanfords Disco, the predecessor of VMWare, uses a full hardware virtualization approach, where Cambridges Xen introduced us to paravirtualization. All Things Distributed. MORE
A vast majority of the features are the same, outside of these advanced features available through the BYOC model: Virtual Private Clouds / Virtual Networks. Where you decide to host your cloud databases is a huge decision. MORE
We see this in virtually every industry—education, manufacturing, and now DevOps and QA testing. It's a fact of business that younger workers are often cheaper than older ones. App Dev & Testing, Testing, Careers MORE
These sit between the database and the clients, sometimes on a seperate server (physical or virtual) and sometimes on the same box, and create a pool that clients can connect to. A long time ago, in a galaxy far far away, ‘threads’ were a programming novelty rarely used and seldom trusted. MORE
In this example, we use Postgres and the pgbench workload generator to drive some load in a virtual machine. Assume a Linux virtual machine that has Postgres installed. Specifically using a Bitnami virtual appliance. Image By Daniel Lundin. MORE
Azure Virtual Networks. Azure makes this easy to setup through the use of a Virtual Network (VNET) which can be configured for your MySQL servers. These are typically configured to communicate across a single network, but if you need to connect more than one region, you can create multiple VNETs to communicate through Virtual Network Peering. MORE
Back on December 5, 2017, Microsoft announced that they were using AMD EPYC 7551 processors in their storage-optimized Lv2-Series virtual machines. The key specifications for the Lsv2 series virtual machines are shown in Table 1. MORE
In this phase, virtual user scripts are run based on the number of concurrent users and workload specified in the non-functional test plan. Performance Test Execution and Monitoring. MORE
If you use React and need to display large lists of data efficiently , you may be familiar with react-virtualized. It's a windowing library by Brian Vaughn that renders only the items currently visible in a list (within a scrolling "viewport"). MORE
Alluxio is leveraged as compute-side virtual storage to improve performance. The Apache Spark + Alluxio stack is getting quite popular particularly for the unification of data access across S3 and HDFS. In addition, compute and storage are increasingly being separated causing larger latencies for queries. But to get the best performance, like any technology stack, you need to follow the best practices. MORE
Data preparation and service virtualization functionality/tools would be here very handy here. And some functionality like network virtualization can be found in more sophisticated products – but it is time to have all of them (or at least have a good integration with “chaos engineering” tools). Following up my post Are Times still Good for Load Testing? , I decided to answer multiple comments here separately. MORE
Despite the proven benefits of service virtualization for software development, the technology often gets underutilized. App Dev & Testing, Testing, Service Virtualization MORE
Most existing security features on the timeline fall into one of four categories: • Virtualization—Giving code the illusion that it is in an environment other than the one it is actually being executed on. MORE
Virtualization Related Topics 
The Morning Paper
MARCH 1, 2020
Firecracker is the virtual machine monitor (VMM) that powers AWS Lambda and AWS Fargate, and has been used in production at AWS since 2018. General-purpose hypervisors and virtual machine monitors (VMMs) are also quite large, leading to a large trusted compute base (TCB).
SQL Performance
DECEMBER 17, 2019
One important choice you will still have to make is what type and size of Azure virtual machine you want to use for your existing SQL Server workload. Microsoft currently has eight main types of virtual machines designed for different types of workloads.
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The Morning Paper
AUGUST 20, 2019
Statiscal foundations of virtual democracy Kahng et al., The big idea behind virtual democracy is that we learn the voting preferences of each stakeholder, essentially creating an agent which is able to vote in their place, a virtual voter. Then when we need to make a decision we ask those virtual voters to cast their votes (in the form of a preference ranking). ICML’19.
TechBeacon Testing
FEBRUARY 13, 2020
Despite the proven benefits of service virtualization for software development, the technology often gets underutilized. App Dev & Testing, Testing, Service Virtualization
n0derunner
JULY 10, 2019
When hypervisor management tools make clones of virtual machines, the tools usually make sure to create a unique MAC address for every clone. The post Duplicate IP issues with Linux and virtual machine cloning. cloud cloning linux virtualizationTL;DR – Some modern Linux distributions use a newer method of identification which, when combined with DHCP can result in duplicate IP addresses when cloning VMs, even when the VMs have unique MAC addresses.
SQL Performance
APRIL 8, 2019
Back on December 5, 2017, Microsoft announced that they were using AMD EPYC 7551 processors in their storage-optimized Lv2-Series virtual machines. The key specifications for the Lsv2 series virtual machines are shown in Table 1.
Brendan Gregg
NOVEMBER 29, 2017
Hardware virtualization for cloud computing has come a long way, improving performance using technologies such as VT-x, SR-IOV, VT-d, NVMe, and APICv. It's an exciting development in cloud computing: hardware virtualization is now fast.
DZone
FEBRUARY 14, 2020
performance ci/cd firewall load balancer it operations network automation virtual appliance cloud data centers application delivery controller hybrid it
All Things Distributed
JULY 20, 2012
Back-to-Basics Weekend Reading - Virtualizing Operating Systems. This weekends back-to-basics reading is on operating system virtualization. There are two papers that deserve the "classic" tag as they both form the basis for operating system virtualization that is in production today. Stanfords Disco, the predecessor of VMWare, uses a full hardware virtualization approach, where Cambridges Xen introduced us to paravirtualization. All Things Distributed.
Scalegrid
JUNE 6, 2019
PALO ALTO, Calif., June 6, 2019 – ScaleGrid , the Database-as-a-Service (DBaaS) leader in the SQL and NoSQL space, has announced the expansion of their fully managed MySQL Hosting services to support Amazon Web Services (AWS) cloud.
Scalegrid
DECEMBER 16, 2019
DigitalOcean specialized in SSD-based virtual machines called Droplets that are broken down into four simple categories. MongoDB is the #3 open source database and the #1 NoSQL database in the world. It’s a cross-platform document-oriented database that uses JSON-like documents with schema, and is leveraged broadly across startup apps up to enterprise-level businesses developing modern apps.
Scalegrid
JULY 8, 2019
Azure Virtual Networks. Azure makes this easy to setup through the use of a Virtual Network (VNET) which can be configured for your MySQL servers. These are typically configured to communicate across a single network, but if you need to connect more than one region, you can create multiple VNETs to communicate through Virtual Network Peering.
Scalegrid
JANUARY 17, 2019
For our MongoDB Bring Your Own Cloud (BYOC) AWS deployments that are not open to the internet, this may mean selecting an instance that is allowed to connect to the Security Group and also has VPN connectivity to the Virtual Private Cloud (VPC).
Scalegrid
OCTOBER 2, 2019
Additionally, organizations can customize their Redis™ persistence and host through their own Azure account which allows them to leverage advanced cloud capabilities like Azure Virtual Networks (VNET), Security Groups, and Reserved Instances to reduce long-term hosting costs up to 60%. PALO ALTO, Calif., October 2, 2019 – ScaleGrid, a rapidly growing leader in the Database-as-a-Service (DBaaS) space, has just launched their new fully managed Hosting on Azure for Redis™ service.
Scalegrid
OCTOBER 2, 2019
Additionally, organizations can customize their Redis persistence and host through their own Azure account which allows them to leverage advanced cloud capabilities like Azure Virtual Networks (VNET), Security Groups, and Reserved Instances to reduce long-term hosting costs up to 60%. PALO ALTO, Calif., October 2, 2019 – ScaleGrid, a rapidly growing leader in the Database-as-a-Service (DBaaS) space, has just launched their new fully managed Redis on Azure service.
High Scalability
MAY 14, 2020
Zoom scaled from 20 million to 300 million users virtually over night. What's incredible is from the outside they've shown little in the way of apparent growing pains, though on the inside it's a good bet a lot of craziness is going on.
DZone
OCTOBER 8, 2019
That’s true for virtually any programming language and platform. Something to test Java's performance. Managing an application’s performance, and specifically keeping it in good condition, is one of the hardest challenges in software development.
TechBeacon Testing
MARCH 3, 2020
We see this in virtually every industry—education, manufacturing, and now DevOps and QA testing. It's a fact of business that younger workers are often cheaper than older ones. App Dev & Testing, Testing, Careers
DZone
JANUARY 22, 2020
JMH is developed by the same people who implement the Java virtual machine (JVM) so they know the internals and how Java makes optimizations at run time. Measure Java performance!
Scalegrid
APRIL 16, 2020
A vast majority of the features are the same, outside of these advanced features available through the BYOC model: Virtual Private Clouds / Virtual Networks. Where you decide to host your cloud databases is a huge decision.
DZone
JANUARY 13, 2020
In simple terms, virtual servers composed of multiple nodes and they communicate and share information through a distributed shared memory grid. Learn more about clustering with MuleSoft. What Is Clustering? Clustering is a group of servers or mule runtime which acts as a single unit.
HammerDB
OCTOBER 17, 2018
However most people use HammerDB with keying and thinking time disabled and therefore each virtual user can approximately drive the CPU resources of one CPU core on the database server. Therefore for the 100 virtual users 400 to 500 warehouses should be a minimum to be configured.
DZone
JULY 30, 2019
In this phase, virtual user scripts are run based on the number of concurrent users and workload specified in the non-functional test plan. Performance Test Execution and Monitoring.
Alex Podelko
AUGUST 18, 2019
Data preparation and service virtualization functionality/tools would be here very handy here. And some functionality like network virtualization can be found in more sophisticated products – but it is time to have all of them (or at least have a good integration with “chaos engineering” tools). Following up my post Are Times still Good for Load Testing? , I decided to answer multiple comments here separately.
Addy Osmani
MARCH 7, 2019
If you use React and need to display large lists of data efficiently , you may be familiar with react-virtualized. It's a windowing library by Brian Vaughn that renders only the items currently visible in a list (within a scrolling "viewport").
ACM Sigarch
OCTOBER 25, 2019
Most existing security features on the timeline fall into one of four categories: • Virtualization—Giving code the illusion that it is in an environment other than the one it is actually being executed on.
DZone
MAY 3, 2019
And software testing is being forced to be reinvented every day due to the introduction of new technologies like artificial intelligence, virtualization, and predictive analysis.
Alex Podelko
SEPTEMBER 4, 2018
It is designed to run in specific environments, like Java Virtual Machine for instance. While both of these programming languages run on Java Virtual Machine, Scala code runs faster on this system for a number of reasons. Guest Post by Wendy Dessler. Source- Pixabay.
HammerDB
JULY 8, 2019
success": {"message": "Building 5 Warehouses with 6 Virtual Users, 5 active + 1 Monitor VU(dict value num_vu is set to 5): JOBID=5D23464E58D203E273738333"}}. HammerDB already has 2 interfaces with which to interface with the commands to build and test databases using the GUI interface or CLI.
DZone
APRIL 26, 2019
In the era of Digital Transformation (DX) the IT landscape has expanded to environments that rely extensively on virtualization, hyper-converged infrastructure (HCI), and cloud computing. As a result, the number of servers and the quantity of traffic have been exploding exponentially.
n0derunner
JUNE 28, 2019
In this example, we use Postgres and the pgbench workload generator to drive some load in a virtual machine. Assume a Linux virtual machine that has Postgres installed. Specifically using a Bitnami virtual appliance. Image By Daniel Lundin.
HammerDB
NOVEMBER 28, 2019
We need a different approach for both because in the schema build we are waiting for all of the virtual users to finish (vwait forever), however for the driver we are waiting for a set period of time before terminating them. For the build I have created more warehouses but with 5 virtual users to show the multithreaded nature of the build.
Dynatrace
APRIL 20, 2020
With Dynatrace Infrastructure Monitoring you get a complete solution for the monitoring of cloud platforms and virtual infrastructure, along with log monitoring and AIOps. Dynatrace news.
n0derunner
JUNE 28, 2019
The Linux VM running postgres has two virtual disks – one taking transaction log writes. A quick look at how the workload is seen from the Nutanix CVM. In this example from prior post. The other is doing reads and writes from the main datafiles.
DZone
JULY 3, 2019
In other words, a cluster is a virtual server composed of multiple nodes. Mule Enterprise Edition supports scalable clustering to provide high availability (HA) for applications.
DZone
JULY 10, 2019
Alluxio is leveraged as compute-side virtual storage to improve performance. The Apache Spark + Alluxio stack is getting quite popular particularly for the unification of data access across S3 and HDFS. In addition, compute and storage are increasingly being separated causing larger latencies for queries. But to get the best performance, like any technology stack, you need to follow the best practices.
Randon ASCII
APRIL 21, 2019
Oddly slow virtual memory scanning of endlessly leaking CFG memory was causing gmail hangs for a while until we added a mitigation in Chrome’s JavaScript engine. I wrote a Python script that generated classes with virtual functions. 0 to 1,280,000 – one per virtual function.
The Morning Paper
DECEMBER 10, 2019
This is a companion paper to the " persistent problem " piece that we looked at earlier this week, going a little deeper into the object pointer representation choices and the mapping of a virtual object space into physical address spaces.
Alex Podelko
OCTOBER 20, 2016
The answer to this challenge is service virtualization, which allows simulating real services during testing without actual access. Cloud and virtualization triggered appearance dynamic, auto-scaling architectures, which significantly impact getting and analyzing feedback. Due to virtualization system-level monitoring doesn’t help much anymore and may be misleading – so getting information from application and database servers becomes very important.
SQL Performance
NOVEMBER 18, 2019
Migrating an on-premises SQL Server instance to an Azure Virtual Machine (VM) is a common method to migrate to Azure. Microsoft has helped simplify things by creating multiple types of virtual machines. High performance compute – Fastest and most powerful CPU virtual machines.
Scalegrid
OCTOBER 17, 2019
These sit between the database and the clients, sometimes on a seperate server (physical or virtual) and sometimes on the same box, and create a pool that clients can connect to. A long time ago, in a galaxy far far away, ‘threads’ were a programming novelty rarely used and seldom trusted.
Wayfair Tech
OCTOBER 27, 2015
The topic is Tungsten.js, our awesome framework that 'lights up' the DOM with fast, virtual-DOM-based updates, React-style, and can be integrated with Backbone.js There's a great interview with our own Matt DeGennaro by Paul Krill of Infoworld that came out a few days ago. and pretty much whatever other framework. Read more. Open Source Web Performance mustache php tungsten.js
The Morning Paper
MARCH 8, 2020
Tenant isolation is achieved by provisioning a separate virtual warehouse (VW) for each tenant. A virtual warehouse comprises a set of compute nodes, and compute elasticity is achieved by adding or removing nodes on an on-demand basis.
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