Need help figuring out Hadoop I/O buffer size. This link:
*io.file.buffersize* is 4K or 64K which makes me wonder. Is that the buffer
which gets filled with records from disk when I have the following in code:
*While( reader.next(Key,Value)) ; ? *
If yes, when I change io.file.buffersize = 64M will that fetch 64MB of
records into memory when I do "reader.next" ?
if no, then how many records are fetched when I do one