I wrote my first Python crawler. It can automatically download my daughter's daily reflections from her school's portal (iParent). No more clicking in their website 🙂 If you are interested, here is the source code.
My first Python crawler
AWS ELB (CLB) vs ALB vs NLB
At the time of writing, there are 3 types of Elastic Load Balancer: CLB (Classic Load Balancer), ALB (Application Load Balancer) and NLB (Network Load Balancer). AWS releases CLB first, then ALB, thats why CLB sometimes is referred as ELB-V1, and ALB is referred as ELB-V2. Then NLB comes as the latest release. From my … Continue reading AWS ELB (CLB) vs ALB vs NLB
Redis CPU Usage Ramps Up after Kernel Patching
I guess you have heard the name of Meltdown and Spectre already. If not, check out this site https://meltdownattack.com/. Definitely, it is not a good start of a New Year. All Cloud providers are busy with patching the kernel of their underlying systems. AWS Elastic cache (Redis) is one of them. Due to its single threaded nature, … Continue reading Redis CPU Usage Ramps Up after Kernel Patching
Things you need to know about AWS VPC based Lambda
There are two types of AWS Lambda networking settings: No VPC and VPC-based. The major difference is that VPC-based Lambda allows you to access the resources in your VPC, e.g your EC2 resources sitting in the private subnets. No VPC lambda only can access Internet by default. Before you choose to use VPC-based lambda, there … Continue reading Things you need to know about AWS VPC based Lambda
Three types of CA Validation Certificate
Domain Validation (DV): This is a lower level of validation. The CA validates that you have control of the domain. A DV certificate expires in 90 days. Organization Validation (OV): A higher level of validation. The CA validates whether or not the company is valid, if it is registered, and if the business contact legitimately … Continue reading Three types of CA Validation Certificate
Jackie Chen's IT Workshop 