Maybe I'm blind but i can't find, in S3 documentation, the maximum file name length that can be uploaded in S3.
The maximum combined length of the file name and path name is 1024 characters. The Unicode representation of a character can occupy several bytes, so the maximum number of characters that a file name might contain can vary. On Linux: The maximum length for a file name is 255 bytes.
S3 provides unlimited scalability, and there is no official limit on the amount of data and number of objects you can store in an S3 bucket. The size limit for objects stored in a bucket is 5 TB.
Linux OS has a 255 bytes limit of a file name, not exactly 255 characters. There is a major difference between character and bytes in file naming.
As follows from the Amazon documentation,
These names are the object keys. The name for a key is a sequence of Unicode characters whose UTF-8 encoding is at most 1024 bytes long.
The max filename length is 1024 characters. If the characters in the name require more than one byte in UTF-8 representation, the number of available characters is reduced.
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