Tag

Posts tagged #benchmarks

2 posts

Build logNov 11, 2026

Building a distributed job scheduler without a queue

at and cron as a service, in Go: six services, MySQL as the queue, Cassandra for history. The decisions behind it, their trade-offs, and what load-testing it on an AWS-shaped bench found, including a bug of mine.

onSystem Design posts Database Internals posts Go posts

#mysql
#cassandra
#scheduling
#distributed-systems
#benchmarks

11 min read · Part 1 of Building a distributed job scheduler

Build logNov 11, 2026

Load-testing a distributed job scheduler on an AWS-shaped bench

An EKS and RDS lookalike on one PC, a cron platform with 30,000 jobs due at 09:00:00, and ten tests. Nothing was lost; the 300 jobs/s ceiling turned out to be an N+1 of mine.

onSystem Design posts Database Internals posts Go posts

#benchmarks
#mysql
#kubernetes
#scheduling
#performance

11 min read · Part 3 of Building a distributed job scheduler