hadoop-general mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Hemanth Yamijala <yhema...@gmail.com>
Subject Re: Why single thread for HDFS?
Date Fri, 02 Jul 2010 07:55:52 GMT

Can you please post this on hdfs-dev@hadoop.apache.org ? I suspect the
most qualified people to answer this question would all be on that


On Fri, Jul 2, 2010 at 11:43 AM, elton sky <eltonsky9404@gmail.com> 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?

View raw message