I understand that distcp is used for inter/intra cluster transfer of data. Is it possible to use distcp to ingest data from the local file system to HDFS. I understand that you can use file:///.... to point to a local file outside of HDFS but how reliable and fast is that compared to the inter/intra cluster transfer.
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Distcp is a mapreduce job that is executed inside the hadoop cluster. For hadoop cluster perspective, your local machine is not a local file system. Then you can't use your local file sytem with distcp. An alternative could be configure a FTP server in your machine that hadoop cluster can read. The performance depends on the network and the protocol used (ftp with hadoop has a very bad performance).
Use hdfs dfs -put command could be better for small amount of data but it isn't work in parallel like distcp.