Namenode

NameNode contains information regarding the block’s location as well as the information of the entire directory structure and fiOHs. ,t Ls D sLQJOH SRLQt RI IDLOXUH LQ thH FOXstHU, L.H., LI 1DPH1RGH JRHs GRwQ, thH whROH fiOH systHP JRHs GRwQ. HDGRRS thHUHIRUH also contains a secondary NameNode which contains an edit logI which in case of the failure of NameNodeI can be used to replay DOO thH DFtLRQs RI thH fiOH systHP DQG thXs UHstRUH thH stDtH RI thH