Does the book say no more than that? Most of the master fs access is encapsulated inside this class: http://hbase.apache.org/xref/org/apache/hadoop/hbase/master/MasterFileSystem.html Take a browse. See how Master does stuff like set up the initial layout on fresh-start/bootstrap and how it orchestrates the WAL file splitting on regionserver crash, etc.
St.Ack On Tue, Mar 18, 2014 at 10:22 PM, Vimal Jain <[email protected]> wrote: > Hi, > While reading Hbase:The definitive guide , its mentioned that sometimes > Hmaster may have to deal with DFS client for accessing HFiles. > What is the use case ? > > -- > Thanks and Regards, > Vimal Jain >
