tech

We often have a pattern of database writes combined with a message queue. But ensuring correctness is hard. We encountered this in real work. In our setup, we wrap API operations to the database in a transaction and publish a message to SQS. Sometimes we see a race condition: the

I recently worked on https://github.com/ClickHouse/ClickHouse/pull/87366. The idea is simple but learned a lot of ClickHouse aggregation, so want to jot it down. Background The original issue stated it clear, if you run almost identical queries, their performances varies a lot! milovidov-pc :) SELECT number % 10000

I recently need to setup VPC peering across different EKS clusters. We use Cilium with routing-mode: native . When debugging connectivity issue I refreshed my understanding of how Cilium work in EKS and what needs to be configured in our cases. Context In my case I have EKS cluster deployed in

A interesting exploration of eBPF LRU map