Documentation, examples in README for how to import from S3 to Scylla

[wpaven]

This capability was added in https://github.com/scylladb/scylla-migrator/issues/136 but what needs to be done to make it work? Can we have some documentation please? Sample config.yaml, sample spark-submit, any considerations for the S3 bucket, etc. would be very useful. And any limitations? Import only works with JSON exports correct?

[julienrf]

For now we have documentation in the file config.yaml.example:

https://github.com/scylladb/scylla-migrator/blob/ab59858bab9814190dd02afdecab92fcb372c421/config.yaml.example#L91-L122

I will publish the docs on the website soon (related: #116)

[wpaven]

Do you have a sample config.yaml that you can share with me until the docs are published please? I have questions, like is the bucket name the arn resource name for the bucket? Seeing an example of the formats for these attributes would be very helpful.

[wpaven]

thanks @julienrf for pointing out the config.yaml example in the test config https://github.com/scylladb/scylla-migrator/blob/master/tests/src/test/configurations/dynamodb-s3-export-to-alternator-basic.yaml