Vivi, There is no inbuilt function to do this, no. You'd have to write the utility yourself.
On Thu, Nov 1, 2012 at 3:01 AM, Vivi Lang <sqlxwei...@gmail.com> wrote: > Please ignore the previous email which I did not describe the problem > clearly. > > On Wed, Oct 31, 2012 at 3:05 PM, Vivi Lang <sqlxwei...@gmail.com> wrote: > >> Hi, thks for the replying. >> >> Is there any function can help me to create a InputStream for a certain >> Block which stored in a certain datanode >> Thanks, >> >> On Sat, Oct 27, 2012 at 9:41 PM, Harsh J <ha...@cloudera.com> wrote: >> >>> Vivi, >>> >>> 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 <sqlxwei...@gmail.com> 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? >>> > >>> > Thanks, >>> > Vivi >>> >>> >>> >>> -- >>> Harsh J >>> >> >> -- Harsh J
