Assuming you know how to get the block info out of a file's metadata,
opening a file for read (with FileSystem.open API, etc.) with an
offset and length set to to match that of a block, will open and read
only that block.
On Sat, Oct 27, 2012 at 2:19 AM, Vivi Lang <[EMAIL PROTECTED]> wrote:
> Hi guys,
> I am writing a program which need the data of several specific blocks (I
> know the blockinfo of those blocks), if I use the Hadoop 0.20, is there
> any funtion which can help me to retrieve the content of block?