Thanks, I think this was deperecated. I'll file a JIRA for this.
On Mon, Mar 24, 2014 at 5:46 PM, 张建伟 <connerlyzh...@gmail.com> wrote: > http://hadoop.apache.org/docs/r1.2.1/hdfs_design.html > > > Staging > > A client request to create a file does not reach the NameNode immediately. > In fact, initially the HDFS client caches the file data into a temporary > local file. Application writes are transparently redirected to this > temporary local file. > > > > > 2014-03-24 17:01 GMT+08:00 Azuryy Yu <azury...@gmail.com>: > > Can you give the URL where you looked at? >> >> >> On Mon, Mar 24, 2014 at 4:49 PM, 张建伟 <connerlyzh...@gmail.com> wrote: >> >>> hi, >>> >>> In the apache site,I find a document said : >>> >>> "A client request to create a file does not reach the NameNode >>> immediately. In fact, initially the HDFS client caches the file data into a >>> temporary local file. Application writes are transparently redirected to >>> this temporary local file. When the local file accumulates data worth over >>> one HDFS block size, the client contacts the NameNode. " >>> >>> does it still right in 2.2.0 and 1.2.1 version? why write a file like >>> this? >>> >> >> >
