SNS - Tag - AWS Senseihttps://aws-sensei.cloud/tags/sns/SNS - Tag - AWS SenseiHugo -- gohugo.ioenFri, 22 May 2026 00:00:00 +0200Smarter S3 Triggers: Hash Files, SNS Fanout, and No More Redundant Callshttps://aws-sensei.cloud/posts/2026-05-22-smarter-post-triggers/Fri, 22 May 2026 00:00:00 +0200Marcelhttps://aws-sensei.cloud/posts/2026-05-22-smarter-post-triggers/🔊 Voiced by Amazon Polly The Polly TTS setup worked well, but there was a flaw: every deployment triggered the Polly Lambda for every post, even when nothing had changed. The Lambda’s content-hash check caught duplicates after the fact, but the invocations still happened for all posts on every push. At the AWS Summit in Hamburg on May 20th I had some time to think through a cleaner solution.