How modern concurrent collectors like G1 and ZGC use the tri-color invariant to do most of their work without stopping your threads, and the JVM flags you actually need in production.

A practitioner’s guide to building sagas for distributed commerce transactions, comparing orchestration and choreography, and showing how compensation, idempotency, and observability keep orders resilient when individual services fail.

A practical tour of nine distributed systems patterns that show up in real production stacks, from leader election to the Saga pattern, with concrete examples from Kafka, Postgres, and large web services.

A working-engineer’s tour of tri-color invariant, write barriers, and the SATB vs. incremental-update trade-offs that make modern concurrent GCs possible.

Containers look like lightweight VMs, but they’re really just processes wrapped in namespaces and cgroups. We unpack mount, PID, network, UTS, IPC, user, and cgroup namespaces, trace how runtimes like containerd wire them together, and explore the failure modes every SRE should know.