Configuring NFS as an HDFS high-availability shared storage System

All commands or steps:

First, install the NFS service on each node

Yum install-y NFS

Service Rpcbind Start

Service NFS Start

Edit the/etc/exports file and add the following line

/mnt/share Hadoop1 (Rw,no_root_squash,async) hadoop2 (Rw,no_root_squash,async) HADOOP6 (Rw,no_root_squash,async) HADOOP7 (Rw,no_root_squash,async)

Indicates that the following four hosts have read and write access to the shared directory/mnt/share.

Add the following lines in the Hdfs-site.xml

　　

< Property>                <name>Dfs.namenode.shared.edits.dir.ns1</name>                <value>File:///root/softs/hadoop-2.7.3/sharelogs/eidts_ns1</value>        </ Property>        < Property>                <name>Dfs.namenode.shared.edits.dir.ns2</name>                <value>File:///root/softs/hadoop-2.7.3/sharelogs/eidts_ns2</value>        </ Property>

mount a shared directory on a node that needs to use a shared directory

Mount-t NFS Hadoop1:/mnt/share sharelogs/

Mount-t NFS Hadoop2:/mnt/share sharelogs/

Mount-t NFS Hadoop6:/mnt/share sharelogs/

Mount-t NFS Hadoop7:/mnt/share sharelogs/

Other specific configurations refer to the Hadoop official documentation

Configuring NFS as an HDFS high-availability shared storage System