No, files are not merged. In general you specify a directory and a file naming convention but each writer writes to its own file.
On Tue, Jun 28, 2016 at 7:45 PM Jakes John <[email protected]> wrote: > Hi, > I would like to know how does the storm HDFS bolt works? As far as > I read about HDFS, it doesn't support multiple writer concurrency on a > file. ie, Multiple writers cannot write to the same file at the same time. > Then, how does it work when multiple bolts try to write to a file in the > HDFS at the same time? I read somewhere that multiple files are created but > merged at last. Is it true? who is doing the merging? > > Thanks, > Jakes >
