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System Design
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Tuấn Anh Phạm10 minutesSecure Container RuntimeContainer is a great tech, but it has problems with security: weak isolation. To cover for it, our company has a policy that enforce...

Vu Nguyen10 minutesSLO Alert to detect and alert service stateSLO is a practice to estimate how good our system is or to detect health issues of the system from the engineering...

CocCoc Techblog7 minutesAn approach to Secret Management ArchitectureManaging secrets / sensitive entities is quite a troublesome yet challenging task. There’re tremendous number of developers out there...

CocCoc Techblog5 minutesLoad-balancing for K8s services in Coccoc InfrastructureFor a very long time, the infrastructure at Coccoc only supports traditional services running on physical hosts. Recently on the rise of...

CocCoc Techblog9 minutesThe Redis StoriesWe’ve probably heard of, or even used Redis quite frequently as part of our infrastructure. Redis is everywhere, which can be a caching layer, a...

CocCoc Techblog6 minutesAdding authorization to a running Kafka clusterWe have several Kafka clusters of growing importance at CocCoc. As usage scales up, we would like to get a handle on the dataflow...

Vu Minh Quan5 minutesOur journey to Kubernetes: Container design principle is your back bagStory 1: Do you know Kubernetes? A little bit… but I know how to run a PHP platform using good container design principles!...

Tuấn Anh Phạm6 minutesPerformance testing for beginners part 1: First step to the chaos worldI must admit: I’m a system admin and a newbie to performance testing, so the content will be very basic. This blogpost will be helpful for ones that...

Tuấn Anh Phạm5 minutesPerformance test for beginners part 2: common mistakesSecond part of the journey: the mistakes. As we ‘re started to enter a new domain, it ‘s easy to make mistakes, or I must say that it ‘s unavoidable...

CocCoc Techblog5 minutesDisk Provisioning and storage demystificationMany of us have heard of Thin/Thick provisioning — the very well-known features advertised widely on the market. In this blogpost we’re not only...

Tungdam7 minutesOur lessons on Linux writeback: do “dirty” jobs the right wayWriteback is innocent. It ensures data consistency and free up memory for other tasks. Understand it then it will pay you back...

CocCoc Techblog6 minutesThe way of KVM: guest’s CPU flagsCoccoc uses KVM (Kernel-based Virtual Machine) virtualization infrastructure as a private cloud solution, and improving its performance and...

CocCoc Techblog4 minutesLinux Zero-Copy Using sendfile()What’s happening under the hood when the OS is copying a file / transfering a file to another host? For our naked eyes the process can be...