See response inline. > -----Original Message----- > From: AnExplorer [mailto:satishtha...@gmail.com] > Sent: Tuesday, June 12, 2012 5:05 PM > To: hbase-u...@hadoop.apache.org > Subject: RE: one HRegionServer means one DataNode? > > > Thanks for the response Ram!! It is pretty much clear to me now that > RegionServers are part of HBase and Datanodes are part of HDFS. > Actually I > have a query - I had setup a hadoop cluster with one master and 3 > slaves. [Ram] Hadoop Cluster -> What are the process that you are running as part of this? [Ram] In HDFS you have Namenode and datanodes. Here Namenode is like a master and Datanodes do the work of serving data. [Ram] In Hbase case, you have 2 things HMaster and HRegionServer.
[Ram] So if your hadoop cluster starts 3 datanodes then you have 3 datanodes in your cluster. [Ram] There can be even one RegionServer alone but the data from them can reside in all three Datanodes. Regards Ram > > > > Ramkrishna.S.Vasudevan wrote: > > > > Hi > > > > Region Server is not DataNode. > > > > DataNodes are part of HDFS. RegionServers are part of HBase. HBase > uses > > HDFS to store data and in the process of storing data DataNodes are > used > > by > > HDFS. DataNodes are the actual machines where the data resides. > > > > Regards > > Ram > > > > > >> -----Original Message----- > >> From: AnExplorer [mailto:satishtha...@gmail.com] > >> Sent: Tuesday, June 12, 2012 3:18 PM > >> To: hbase-u...@hadoop.apache.org > >> Subject: one HRegionServer means one DataNode? > >> > >> > >> Hi..I am new to Hbase. Can anyone please suggest that one > HRegionServer > >> means > >> one DataNode? Can there be multiple data nodes in one > >> HRegionServer??:confused: > >> -- > >> View this message in context: http://old.nabble.com/one- > HRegionServer- > >> means-one-DataNode--tp33998720p33998720.html > >> Sent from the HBase User mailing list archive at Nabble.com. > > > > > > > > -- > View this message in context: http://old.nabble.com/one-HRegionServer- > means-one-DataNode--tp33998720p33999181.html > Sent from the HBase User mailing list archive at Nabble.com.
