srowen commented on a change in pull request #24548: [MINOR][SS][DOC] Added missing config `maxFileAge` in file streaming source URL: https://github.com/apache/spark/pull/24548#discussion_r282146909
########## File path: docs/structured-streaming-programming-guide.md ########## @@ -510,7 +510,7 @@ returned by `SparkSession.readStream()`. In [R](api/R/read.stream.html), with th #### Input Sources There are a few built-in sources. - - **File source** - Reads files written in a directory as a stream of data. Supported file formats are text, csv, json, orc, parquet. See the docs of the DataStreamReader interface for a more up-to-date list, and supported options for each file format. Note that the files must be atomically placed in the given directory, which in most file systems, can be achieved by file move operations. + - **File source** - Reads files written in a directory as a stream of data(files will be processed in the order of file's modification time, this is to mimic the time series feature from streaming nature. If `latestFirst` is set, order will be reversed). Supported file formats are text, csv, json, orc, parquet. See the docs of the DataStreamReader interface for a more up-to-date list, and supported options for each file format. Note that the files must be atomically placed in the given directory, which in most file systems, can be achieved by file move operations. Review comment: I think the text need a number of fixes: ``` Reads files written in a directory as a stream of data. Files will be processed in the order of file modification time. If `latestFirst` is set, order will be reversed. Supported file formats are text, CSV, JSON, ORC, Parquet. See the docs of the DataStreamReader interface for a more up-to-date list, and supported options for each file format. Note that the files must be atomically placed in the given directory, which in most file systems, can be achieved by file move operations. ``` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
