Hi, I suggest that you read how data is stored in HDFS, see http://hadoop.apache.org/core/docs/r0.18.0/hdfs_design.html
J-D On Sat, Sep 6, 2008 at 12:11 AM, ZhiHong Fu <[EMAIL PROTECTED]> wrote: > hello. I'm a new user to hadoop. and Now I hava a problem in understanding > Hdfs. > In such a scene. I have several databases and want to index them. So > when > I map indexing database, I have to control which database index was stored > in which datanode. So when database updated, The index can be updated > correspondely. > So how can i get to do this? thanks >
