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 >> > >
