it depends on how you partition your file. in my case I write file per hour, so I'm sure that file is ready after that hour period, in processing time. Here, read to be ready means this file contains all the data in that hour period.
If the downstream runs in a batch way, you may want to ensure the file is ready. In this case, ready to read can mean all the data before watermark as arrived. You could take the BucketingSink and implement this logic there, maybe wait until watermark reaches Best, Sendoh -- Sent from: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/
