This Week I Learned - Week #52 2019
This Week I Learned -
* In a GigaOm study comparing throughput performance between SQL Server on Azure Virtual Machines and SQL Server on AWS EC2. Azure emerged as the clear leader across both Windows and Linux for mission-critical workloads, up to 3.4 times faster and up to 87 percent less expensive than AWS EC2. A key reason why Azure price-performance is superior to AWS is Azure BlobCache, which provides free reads. Given that most online transaction processing (OLTP) workloads today come with a ten-to-one read-to-write ratio, this provides customers with significant savings.
* AzureCharts.com provides a visual digest of vital info related to Azure Services. It can answer these questions faster than if you had to look it up in the Azure documentation -
>> Is a particular VM instance type available in all regions?
>> Is a service Generally Available or in Preview mode? In how many regions is it available?
>> What are all the Azure services available under the Networking (or any other) category?
>> What is the availability SLA for Azure SQL Database (or any other) service?
>> Are all the Azure services I need available in Region X or Region Y?
* Deduplication in cloud and other storage platforms is a process by which repeated or duplicate data is removed from a data stream to reduce the amount of physical data stored in an appliance or system. Many backup software platforms will dedupe at the source, and hold only the deduplicated data on physical storage. The backup software owns and manages the metadata that does the logical-to-physical translation. In the backup world, deduplication is used to reduce the volume of physical data stored when doing repeated backups of the same data set, such as a VM. When only a small percentage (say 5% to 10%) of the actual data changes between backups, deduplication ensures that the physical space consumed is as optimal as possible. Backup systems can see deduplication rates of 20:1 and higher.
* Insights are useful, non-obvious findings -
* Location data is technically anonymous, so companies can claim it’s not “personally identifiable information.” But, as a NY Times investigation found, it can be extremely easy to deanonymize it.
* The Cambridge Analytica scandal was the result of data initially purposed for research circulating to outside groups.
* If you only allow location-sharing when the app is open, apps cannot collect location data when they’re closed. But we have seen examples of apps being “turned on” for a type of location tracking called Bluetooth beacons. Quartz also found that Google could still track you using Bluetooth even when the setting was off - NY Times
* Some apps also deduce your location information even when you choose not to share it. A few weeks ago Facebook explained to Congress that it uses context clues like I.P. addresses and tags in photos to figure out location for users who’ve disabled the feature.
* Twitter retains Exif data temporarily to process your photo. It is not available to those who view your photo on Twitter.
* The All India Muslim League and the Hindu Mahasabha were both formed in 1906
* Lala Lajpat Rai is the founder of Benaras Hindu University
* Mysore Soap is not made in Mysore
* Indelible Ink is made in Mysore. It is exported to other countries like Cambodia
* Sandalwood oil comes from the heart of the stem
* The average Sandalwood tree lives for 80 years
* Mysore Pak was invented in the Wodeyar Palace in the 17th century by chef Kakasura Madappa
* First they came for the Socialists, and I did not speak out—
Because I was not a Socialist.
Then they came for the Trade Unionists, and I did not speak out—
Because I was not a Trade Unionist.
Then they came for the Jews, and I did not speak out—
Because I was not a Jew.
Then they came for me—and there was no one left to speak out for me.
- Martin Neimöller, the German theologian
* In a GigaOm study comparing throughput performance between SQL Server on Azure Virtual Machines and SQL Server on AWS EC2. Azure emerged as the clear leader across both Windows and Linux for mission-critical workloads, up to 3.4 times faster and up to 87 percent less expensive than AWS EC2. A key reason why Azure price-performance is superior to AWS is Azure BlobCache, which provides free reads. Given that most online transaction processing (OLTP) workloads today come with a ten-to-one read-to-write ratio, this provides customers with significant savings.
* AzureCharts.com provides a visual digest of vital info related to Azure Services. It can answer these questions faster than if you had to look it up in the Azure documentation -
>> Is a particular VM instance type available in all regions?
>> Is a service Generally Available or in Preview mode? In how many regions is it available?
>> What are all the Azure services available under the Networking (or any other) category?
>> What is the availability SLA for Azure SQL Database (or any other) service?
>> Are all the Azure services I need available in Region X or Region Y?
* Deduplication in cloud and other storage platforms is a process by which repeated or duplicate data is removed from a data stream to reduce the amount of physical data stored in an appliance or system. Many backup software platforms will dedupe at the source, and hold only the deduplicated data on physical storage. The backup software owns and manages the metadata that does the logical-to-physical translation. In the backup world, deduplication is used to reduce the volume of physical data stored when doing repeated backups of the same data set, such as a VM. When only a small percentage (say 5% to 10%) of the actual data changes between backups, deduplication ensures that the physical space consumed is as optimal as possible. Backup systems can see deduplication rates of 20:1 and higher.
* Insights are useful, non-obvious findings -
* Location data is technically anonymous, so companies can claim it’s not “personally identifiable information.” But, as a NY Times investigation found, it can be extremely easy to deanonymize it.
* The Cambridge Analytica scandal was the result of data initially purposed for research circulating to outside groups.
* If you only allow location-sharing when the app is open, apps cannot collect location data when they’re closed. But we have seen examples of apps being “turned on” for a type of location tracking called Bluetooth beacons. Quartz also found that Google could still track you using Bluetooth even when the setting was off - NY Times
* Some apps also deduce your location information even when you choose not to share it. A few weeks ago Facebook explained to Congress that it uses context clues like I.P. addresses and tags in photos to figure out location for users who’ve disabled the feature.
* The All India Muslim League and the Hindu Mahasabha were both formed in 1906
* Lala Lajpat Rai is the founder of Benaras Hindu University
* Mysore Soap is not made in Mysore
* Indelible Ink is made in Mysore. It is exported to other countries like Cambodia
* Sandalwood oil comes from the heart of the stem
* The average Sandalwood tree lives for 80 years
* Mysore Pak was invented in the Wodeyar Palace in the 17th century by chef Kakasura Madappa
* First they came for the Socialists, and I did not speak out—
Because I was not a Socialist.
Then they came for the Trade Unionists, and I did not speak out—
Because I was not a Trade Unionist.
Then they came for the Jews, and I did not speak out—
Because I was not a Jew.
Then they came for me—and there was no one left to speak out for me.
- Martin Neimöller, the German theologian
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