Seek time is ~ 10ms. If seek time has to be 1% of the transfer time then transfer time has to be ~ 1000 ms (1s).
In ~ 1000 ms (1s) with a transfer rate of 100 MB/s, a block of 100MB can be read. Praveen On Wed, Feb 22, 2012 at 11:22 AM, viva v <vivamail...@gmail.com> wrote: > Have just started getting familiar with Hadoop & HDFS. Reading Tom White's > book. > > The book describes an example related to HDFS block size. Here's a > verbatim excerpt from the book > > "If the seek time is around 10 ms, and the transfer rate is 100 MB/s, then > to make the seek time 1% of the transfer time, we need to make the block > size around 100 MB." > > I can't seem to understand how we arrived at the fact that block size > shold be 100MB. > > Could someone please help me understand? > > Thanks > Viva >
