New year new resolutions. I have just setup a 2 weeks challenge for myself - get the 'AWS Certified Solution Architect - Associate'. Exam has been booked for 31/Jan, no prep has been done yet. Updates: 16/Jan: book exam for 31/Jan 31/Jan: PASS References: AWS Certified Solutions Architect Associate Exam Blueprint A curated list of AWS … Continue reading 2 Weeks Challenge of ‘AWS Certified Solutions Architect – Associate’
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
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
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
Caching is 'fun' if you don't set it up correctly. A useful cheat sheet of CloudFront edge cache TTL settings that I found in AWS documents site. Origin Configuration Minimum TTL = 0 Seconds Minimum TTL > 0 Seconds The origin adds a Cache-Control max-age directive to objects CloudFront caching CloudFront caches objects for the lesser of … Continue reading CloudFront Edge Cache Settings
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