[user9999999999]

if only metadata could be queried without processing a csv output file first, imagine storing thumbnails in there even! copied objects had actual events, not something you have to dig cloudtrail for, you could get last update time from a bucket to make caching easier

[aeyes]

When S3 Tables launched they made the Metadata available using this technology. So you can query it like an Apache Iceberg table.

https://aws.amazon.com/blogs/aws/introducing-queryable-objec...

[huntaub]

Are you talking about getting metadata from many objects in the bucket simultaneously? You might be interested in S3 Metadata https://docs.aws.amazon.com/AmazonS3/latest/userguide/UsingM....

[user9999999999]

whoops. I was wrong! you can store base64 encoded metadata in the object then run a HEAD request to get it, but its limited to 2kb. also, you ~can~ query the metadata, but its latency is more suited to batch processing and not lambdas