This Week I Learned - Week #5 2020
This Week I Learned -
* Resources deployed through some Azure PaaS services (such as Azure Storage and Azure SQL Database), can restrict network access to VNet through the use of virtual network service endpoints or Azure Private Link.
* Updates rarely affect the hosted VMs. When updates do have an effect, Azure chooses the least impactful method for updates:
- If the update doesn't require a reboot, the VM is paused (for 10-30 seconds) while the host is updated, or the VM is live-migrated to an already updated host. Live migration is an operation that doesn't require a reboot and that preserves memory for the VM. Memory-preserving maintenance works for more than 90 percent of Azure VMs. It doesn't work for G, M, N, and H series. Live migration can also be used to move VMs when Azure Machine Learning algorithms predict an impending hardware failure or when you want to optimize VM allocations.
- If maintenance requires a reboot, you're notified of the planned maintenance. The self-maintenance window is typically 30 days unless the maintenance is urgent.
* Virtual machine scale sets are an Azure compute resource that you can use to deploy and manage a set of identical VMs as a single resource. The scale set is automatically deployed across UDs, like VMs in an availability set. As with availability sets, when you use scale sets, only one UD is updated at any given time during scheduled maintenance.
* Many customers when starting to migrate workloads to Azure will use their existing Demilitarized Zone (DMZ) to provide external access, and route traffic via their WAN to the workloads running in Azure.
* It is not generally recommended to combine both Azure Disk Encryption with DBMS encryption, as this may impact performance.
* In the world of SAP, the application tier can scale horizontally, but in general terms the database tier needs to scale vertically; while horizontally scalable database technologies such as Oracle Real Application Cluster (RAC) and SAP HANA Scale-Out are supported with SAP, they don't suit all SAP applications.
* web.dev/metrics covers how to measure modern web performance metrics & optimize for them.
* Emojis often serve as emotional shorthand — think smiley blowing a heart kiss to soften a message or send love, or a winking face to signal sarcasm — filling an expressive void that text messages may fail to convey. Some have hailed emoji as a new language. One enthusiast produced a crowdsourced and crowd-funded emoji version of Herman Melville’s classic “Moby-Dick” titled “Emoji Dick.” In 2015, Oxford Dictionaries chose the “face with tears of joy” emoji as its word of the year, saying it best represented “the ethos, mood and preoccupations” of the period. Emojis may just be the latest manifestation in a long history of pictographic writing and signage, from prehistoric cave painting to advertising logos. Cave dwellers used strong colors to make their wall images tens of thousands
of years ago. They invented the emoji.
* China is the world's largest exporter and second-largest importer of goods.
* The Arctic tern is famous for its migration; it flies from its Arctic breeding grounds to the Antarctic and back again each year, the shortest distance between these areas being 19,000 km (12,000 mi). The long journey ensures that this bird sees two summers per year and more daylight than any other creature on the planet.
* Monotremes (Prototheria) are one of the three main groups of living mammals, along with placentals (Eutheria) and marsupials (Metatheria).
* Monotremes lay eggs rather than bear live young. The only surviving examples of monotremes are all indigenous to Australia and New Guinea although there is evidence that they were once more widespread including some extinct species in South America.The extant monotreme species are the platypus and four species of echidnas.
* The placentals are partly distinguished from other mammals in that the fetus is carried in the uterus of its mother to a relatively late stage of development.
* A distinctive characteristic common to marsupials is that most of the young are carried in a pouch. Well-known marsupials include kangaroos, wallabies, koalas, phalangeriformes, opossums, wombats, and Tasmanian devils. All extant marsupials are endemic to Australasia and the Americas.
* Resources deployed through some Azure PaaS services (such as Azure Storage and Azure SQL Database), can restrict network access to VNet through the use of virtual network service endpoints or Azure Private Link.
* Updates rarely affect the hosted VMs. When updates do have an effect, Azure chooses the least impactful method for updates:
- If the update doesn't require a reboot, the VM is paused (for 10-30 seconds) while the host is updated, or the VM is live-migrated to an already updated host. Live migration is an operation that doesn't require a reboot and that preserves memory for the VM. Memory-preserving maintenance works for more than 90 percent of Azure VMs. It doesn't work for G, M, N, and H series. Live migration can also be used to move VMs when Azure Machine Learning algorithms predict an impending hardware failure or when you want to optimize VM allocations.
- If maintenance requires a reboot, you're notified of the planned maintenance. The self-maintenance window is typically 30 days unless the maintenance is urgent.
* Virtual machine scale sets are an Azure compute resource that you can use to deploy and manage a set of identical VMs as a single resource. The scale set is automatically deployed across UDs, like VMs in an availability set. As with availability sets, when you use scale sets, only one UD is updated at any given time during scheduled maintenance.
* Many customers when starting to migrate workloads to Azure will use their existing Demilitarized Zone (DMZ) to provide external access, and route traffic via their WAN to the workloads running in Azure.
* It is not generally recommended to combine both Azure Disk Encryption with DBMS encryption, as this may impact performance.
* In the world of SAP, the application tier can scale horizontally, but in general terms the database tier needs to scale vertically; while horizontally scalable database technologies such as Oracle Real Application Cluster (RAC) and SAP HANA Scale-Out are supported with SAP, they don't suit all SAP applications.
* web.dev/metrics covers how to measure modern web performance metrics & optimize for them.
of years ago. They invented the emoji.
* The Arctic tern is famous for its migration; it flies from its Arctic breeding grounds to the Antarctic and back again each year, the shortest distance between these areas being 19,000 km (12,000 mi). The long journey ensures that this bird sees two summers per year and more daylight than any other creature on the planet.
* Monotremes (Prototheria) are one of the three main groups of living mammals, along with placentals (Eutheria) and marsupials (Metatheria).
* Monotremes lay eggs rather than bear live young. The only surviving examples of monotremes are all indigenous to Australia and New Guinea although there is evidence that they were once more widespread including some extinct species in South America.The extant monotreme species are the platypus and four species of echidnas.
* The placentals are partly distinguished from other mammals in that the fetus is carried in the uterus of its mother to a relatively late stage of development.
* A distinctive characteristic common to marsupials is that most of the young are carried in a pouch. Well-known marsupials include kangaroos, wallabies, koalas, phalangeriformes, opossums, wombats, and Tasmanian devils. All extant marsupials are endemic to Australasia and the Americas.
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