from Hacker News

Load testing at scale and lessons learned

by Kaedon on 1/18/22, 7:54 PM with 4 comments

• by tmikaeld on 1/20/22, 6:23 AM

  Would have been more interesting article if it described the services affected, what made them slow, what was done to overcome it etc.

  Also, the numbers doesn’t seem to reflect a horizontally scalable cluster deployment, the load numbers are low enough for a single server to handle.

• by stitched2gethr on 1/20/22, 1:28 PM

  Very thorough.

  > In the face of ambiguity, refuse the temptation to guess.

  Great advice, but shouldn't it apply to the test traffic as well? Mimicking traffic patterns and making assumptions has a lot of downsides. You'll always be wrong, though the margin of error will vary. Traffic capture and replay is a great way to ensure load test traffic looks like the real thing.