Object size accuracy

[michal-siedlaczek]

Hello AWS community, are the object sizes as reported by ListObjectsV2 or HeadObject always reflect the exact number of bytes in the object (and will be the same as the file size on disk after download) or is there a possibility (however rare) of it being an approximation?

[debora-ito]

@michal-siedlaczek are you seeing discrepancies on the size? Can you repro reliably with a code example?

[michal-siedlaczek]

@debora-ito No, I'm not seeing the discrepancies. I'm just about to rely on this in a very crucial part of my system, and I'm looking for confirmation whether it is in fact something we can rely on. Nothing in the documentation would suggest that it's not the case but at the same time all the docs are very brief and do go into detail, so I'm looking for some peace of mind ;)

Judging by your response, the reported size should be the accurate size of the object in bytes, is that correct?