start and return the minidfscluster . concode_field_sep MiniDFSCluster cluster concode_elem_sep int BLOCK_SIZE concode_elem_sep Configuration conf concode_elem_sep TestContext testCtx concode_field_sep FileSystem getFailoverFs concode_elem_sep void startThreads concode_elem_sep void addFailoverThread concode_elem_sep void stopThreads concode_elem_sep void addReplicationTriggerThread concode_elem_sep void shutdown
MiniDFSCluster function ( ) { cluster = new MiniDFSCluster . Builder ( conf ) . nnTopology ( MiniDFSNNTopology . simpleHATopology ( ) ) . numDataNodes ( 3 ) . build ( ) ; return cluster ; }