amazon s3 - How the upload by region in AWS stack works? -

i unable understand regions in aws stack. read somewhere in aws document uploading data(s3) 1 region not reflects automatically other region. need upload available regions reflects uploaded file world wide? used upload s3 using aws console in 1 region , not aware of region upload in aws. today changed in region in aws console url , found content same. if reflects automatically point of specifying region when uploading s3 or other aws service.

i understand confusion it's not clear how work. how works imo:

you can choose region optimize latency, minimize costs, or address regulatory requirements. objects stored in region never leave region unless explicitly transfer them region. more information regions, see accessing bucket in amazon simple storage service developer guide.

therefore when create bucket being asked choose regions bucket has got regions specific address i.e.:

s3-<region>.amazonaws.com

if able see same content of bucket in different regions have enabled cross-region replication.

cross-region replication automatic, asynchronous copying of objects across buckets in different aws regions. activating cross-region replication, amazon s3 replicate newly created objects, object updates, , object deletions source bucket destination bucket in different region. cross-region replication has specific requirements define can , cannot replicated across regions based on how object created , how encrypted. more information, see cross-region replication amazon simple storage service developer guide.

you have asked:

if reflects automatically point of specifying region when uploading s3 or other aws service.

as per above doesn't reflect automatically , main points are:

• optimize latency -- closer servers or clients lower latency
• minimize costs -- can avoid charges data transfers, regions cheaper others, etc.
• address regulatory requirements -- or clients may need meet regulatory requirements i.e. data can't leave usa or europe or similar