This Week I Learned - Week #6 2020
This Week I Learned -
* You can use VNets to provision and manage virtual private networks (VPNs) in Azure and, optionally, link the VNets with other VNets in Azure, or with your on-premises IT infrastructure to create hybrid or cross-premises solutions. Each VNet you create has its own CIDR block and can be linked to other VNets and on-premises networks as long as the CIDR blocks do not overlap.
* In addition to the large IOPS capacity of the Premium Disks, Azure Blobcache is a huge value for mission critical OLTP workloads as it brings significant additional high-performance I/O capacity to Azure Virtual Machine for free. Blobcache is a multi-tier caching technology enabled by combining the VM RAM and local SSD. You can host SQL Server data files on premium SSD managed disks with read only Blobcache and leverage extremely high-performance read I/Os that exceed the underlying disk’s capabilities. High scale VMs comes with very large Blobcache sizes that can host the all the data files for most applications. As all I/O activity from the Blobcache is free, you can boost application throughput with extremely high performance reads and optimize price-performance by only paying for the writes. Considering the majority of the OLTP workloads today come with 10 to 1 ratio for read and write, this is up to a 90 percent price-performance gain - Azure Blog
* The Azure Site Recovery deployment planner is a command-line tool for both Hyper-V to Azure and VMware to Azure disaster recovery scenarios. You can remotely profile your Hyper-V VMs present on multiple Hyper-V hosts using this tool (with no production impact whatsoever) to understand the bandwidth and Azure storage requirements for successful replication and test failover / failover. You can run the tool without installing any Azure Site Recovery components on-premises. However, to get accurate achieved throughput results, Microsoft recommends that you run the planner on a Windows Server that has the same hardware configuration as that of one of the Hyper-V servers that you will use to enable disaster recovery protection to Azure.
* Constrained vCPU capable VM sizes - The vCPU count can be constrained to one half or one quarter of the original VM size. These new VM sizes have a suffix that specifies the number of active vCPUs to make them easier for you to identify. For example, the current VM size Standard_GS5 comes with 32 vCPUs, 448 GB RAM, 64 disks (up to 256 TB), and 80,000 IOPs or 2 GB/s of I/O bandwidth. The new VM sizes Standard_GS5-16 and Standard_GS5-8 comes with 16 and 8 active vCPUs respectively, while maintaining the rest of the specs of the Standard_GS5 for memory, storage, and I/O bandwidth. The licensing fees charged for SQL Server or Oracle are constrained to the new vCPU count, and other products should be charged based on the new vCPU count. This results in a 50% to 75% increase in the ratio of the VM specs to active (billable) vCPUs. These new VM sizes allow customer workloads to use the same memory, storage, and I/O bandwidth while optimizing their software licensing cost.
* Service Map discovers and maps server and process dependencies in real-time, without any predefinition, and visualizes application components, service dependencies, and supporting infrastructure configuration. This helps you eliminate the guesswork of problem isolation, identify surprise connections and broken links in your environment, and perform Azure migrations knowing that critical systems and endpoints won't be left behind. Service Map supports Windows and Linux guests, for any cloud and on-prem.
* In Azure, the smallest supported IPv4 subnet is /29, and the largest is /8 (using CIDR subnet definitions). In AWS, the smallest IPv4 subnet (and VPC) you can create uses a /28 netmask (16 IPv4 addresses), and the largest uses a /16 netmask (65,536 IPv4 addresses). IPv6 subnets must be exactly /64 in size in both AWS & Azure.
* Chrome DevTools UI can be a little overwhelming but knowing the tabs better can boost your productivity.
* Oracle stated that from January 2019, Java SE 8 public updates would no longer be available for business, commercial or production use without a commercial license. Personal users however, may continue to utilize Java for the most common computing tasks on personal desktops, notebooks, smartphones and tablets for free.
* Vysor is an app that lets you mirror and control Android from a PC
* A web page opened in Chrome on an Android device can be viewed on a desktop PC via Chrome Dev Tools by enabling USB debugging and a USB cable connection. Screencasts only display page content.
* Geolocation and Device Orientation can be simulated with Chrome DevTools
* Indians spend an average of 21.5 hours a week listening to music, some 20% higher than the global average, according to consulting firm Deloitte. The world’s most-watched YouTube channel is T-Series, which shows Indian music videos and has racked up tens of billions more views than any other channel - WSJ
* The public transport tab on Google Maps for Android now informs users about a journey that combines auto-rickshaw and public transport. It indicates how much time it will take, and which station they should take an auto-rickshaw to/from. This mixed mode commute feature is currently available for Delhi and Bangalore. Public toilets inspired from Swachh Bharat Mission, digital address called "Plus codes" for location sharing, mixed mode commute are some of the features first started in India and implemented in other foreign markets.
* One of the reasons why MBA students come to business school is because they want the benefits of life-long membership in alumni communities, to network and seek career opportunities - FT
* South Korea’s accidental breakout hit “Parasite” is up for six Oscars including best picture and best director. “Parasite” made history as the first non-English language film to win Best Picture at the Oscars and won four awards in total. Though it has an all-South Korean cast, a South Korean setting and a focus on South Korean social issues it has attained critical and commercial success ($33 million) in the U.S. It has connected with international audiences in part because it strikes universal themes and hits on social issues that are playing out in many countries.
* FOMO — or, fear of missing out — knows that it can feel like the opposite of laughing out loud (LOL). It has to do with the perception that other people are having interesting, fun, or exciting experiences and that you’re missing out or being left out. This might leave you feeling lonely, jealous, inadequate, or sad. The first step to overcoming FOMO might be to simply remember that people tend to only show their best self to others, especially on the internet. While other people’s lives might seem bright, shiny, and exciting from the outside, everyone has their own peaks and valleys; your experiences are just as valuable and unique as anyone else’s! These days, FOMO can often be triggered when people are on social media overload - Go Ask Alice!
* You can use VNets to provision and manage virtual private networks (VPNs) in Azure and, optionally, link the VNets with other VNets in Azure, or with your on-premises IT infrastructure to create hybrid or cross-premises solutions. Each VNet you create has its own CIDR block and can be linked to other VNets and on-premises networks as long as the CIDR blocks do not overlap.
* In addition to the large IOPS capacity of the Premium Disks, Azure Blobcache is a huge value for mission critical OLTP workloads as it brings significant additional high-performance I/O capacity to Azure Virtual Machine for free. Blobcache is a multi-tier caching technology enabled by combining the VM RAM and local SSD. You can host SQL Server data files on premium SSD managed disks with read only Blobcache and leverage extremely high-performance read I/Os that exceed the underlying disk’s capabilities. High scale VMs comes with very large Blobcache sizes that can host the all the data files for most applications. As all I/O activity from the Blobcache is free, you can boost application throughput with extremely high performance reads and optimize price-performance by only paying for the writes. Considering the majority of the OLTP workloads today come with 10 to 1 ratio for read and write, this is up to a 90 percent price-performance gain - Azure Blog
* The Azure Site Recovery deployment planner is a command-line tool for both Hyper-V to Azure and VMware to Azure disaster recovery scenarios. You can remotely profile your Hyper-V VMs present on multiple Hyper-V hosts using this tool (with no production impact whatsoever) to understand the bandwidth and Azure storage requirements for successful replication and test failover / failover. You can run the tool without installing any Azure Site Recovery components on-premises. However, to get accurate achieved throughput results, Microsoft recommends that you run the planner on a Windows Server that has the same hardware configuration as that of one of the Hyper-V servers that you will use to enable disaster recovery protection to Azure.
* Constrained vCPU capable VM sizes - The vCPU count can be constrained to one half or one quarter of the original VM size. These new VM sizes have a suffix that specifies the number of active vCPUs to make them easier for you to identify. For example, the current VM size Standard_GS5 comes with 32 vCPUs, 448 GB RAM, 64 disks (up to 256 TB), and 80,000 IOPs or 2 GB/s of I/O bandwidth. The new VM sizes Standard_GS5-16 and Standard_GS5-8 comes with 16 and 8 active vCPUs respectively, while maintaining the rest of the specs of the Standard_GS5 for memory, storage, and I/O bandwidth. The licensing fees charged for SQL Server or Oracle are constrained to the new vCPU count, and other products should be charged based on the new vCPU count. This results in a 50% to 75% increase in the ratio of the VM specs to active (billable) vCPUs. These new VM sizes allow customer workloads to use the same memory, storage, and I/O bandwidth while optimizing their software licensing cost.
* Service Map discovers and maps server and process dependencies in real-time, without any predefinition, and visualizes application components, service dependencies, and supporting infrastructure configuration. This helps you eliminate the guesswork of problem isolation, identify surprise connections and broken links in your environment, and perform Azure migrations knowing that critical systems and endpoints won't be left behind. Service Map supports Windows and Linux guests, for any cloud and on-prem.
* In Azure, the smallest supported IPv4 subnet is /29, and the largest is /8 (using CIDR subnet definitions). In AWS, the smallest IPv4 subnet (and VPC) you can create uses a /28 netmask (16 IPv4 addresses), and the largest uses a /16 netmask (65,536 IPv4 addresses). IPv6 subnets must be exactly /64 in size in both AWS & Azure.
* Chrome DevTools UI can be a little overwhelming but knowing the tabs better can boost your productivity.
* Oracle stated that from January 2019, Java SE 8 public updates would no longer be available for business, commercial or production use without a commercial license. Personal users however, may continue to utilize Java for the most common computing tasks on personal desktops, notebooks, smartphones and tablets for free.
* Vysor is an app that lets you mirror and control Android from a PC
* A web page opened in Chrome on an Android device can be viewed on a desktop PC via Chrome Dev Tools by enabling USB debugging and a USB cable connection. Screencasts only display page content.
* Geolocation and Device Orientation can be simulated with Chrome DevTools
* Indians spend an average of 21.5 hours a week listening to music, some 20% higher than the global average, according to consulting firm Deloitte. The world’s most-watched YouTube channel is T-Series, which shows Indian music videos and has racked up tens of billions more views than any other channel - WSJ
* The public transport tab on Google Maps for Android now informs users about a journey that combines auto-rickshaw and public transport. It indicates how much time it will take, and which station they should take an auto-rickshaw to/from. This mixed mode commute feature is currently available for Delhi and Bangalore. Public toilets inspired from Swachh Bharat Mission, digital address called "Plus codes" for location sharing, mixed mode commute are some of the features first started in India and implemented in other foreign markets.
* One of the reasons why MBA students come to business school is because they want the benefits of life-long membership in alumni communities, to network and seek career opportunities - FT
* South Korea’s accidental breakout hit “Parasite” is up for six Oscars including best picture and best director. “Parasite” made history as the first non-English language film to win Best Picture at the Oscars and won four awards in total. Though it has an all-South Korean cast, a South Korean setting and a focus on South Korean social issues it has attained critical and commercial success ($33 million) in the U.S. It has connected with international audiences in part because it strikes universal themes and hits on social issues that are playing out in many countries.
* FOMO — or, fear of missing out — knows that it can feel like the opposite of laughing out loud (LOL). It has to do with the perception that other people are having interesting, fun, or exciting experiences and that you’re missing out or being left out. This might leave you feeling lonely, jealous, inadequate, or sad. The first step to overcoming FOMO might be to simply remember that people tend to only show their best self to others, especially on the internet. While other people’s lives might seem bright, shiny, and exciting from the outside, everyone has their own peaks and valleys; your experiences are just as valuable and unique as anyone else’s! These days, FOMO can often be triggered when people are on social media overload - Go Ask Alice!
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