Hi, Can you please post this on [email protected] ? I suspect the most qualified people to answer this question would all be on that list.
Hemanth On Fri, Jul 2, 2010 at 11:43 AM, elton sky <[email protected]> wrote: > I guess this question was igored, so I just post it again. > > From my understanding, HDFS uses a single thread to do read and write. > Since a file is composed of many blocks and each block is stored as a file > in the underlying FS, we can do some parallelism on block base. > When read across multi-blocks, threads can be used to read all blocks. When > write, we can calculate the offset of each block and write to all of them > simultaneously. > > Is this right? >
