Data Access¶

The master node hosts a RAID system of hard disks that will store all data generated by ProCKSI by all slave nodes and the master node itself. This partition must be accessible by all nodes and is exported as a network file system (NFS) therefore. Executables used by ProCKSI must be installed locally on each slave node for better performance.

• Add the following to the end of /etc/exports on the master node (master01):
  

     /home  192.168.199.0/255.255.255.0(rw,async,no_subtree_check,no_root_squash)
  

• Add the following to the end of /etc/fstab on each slave node:
  

     master01:/home   /home   nfs   bg,hard,intr,tcp   0 0
  

• Modify /etc/sysconfig/nfs on the master node in order to tune NFS by increasing the number of nfsd threads:
  

     RPCNFSDCOUNT=16
  

• Make the NFS daemons start at bootup. Enter at the command line of the master node and each slave node:
  

     /sbin/chkconfig  --add nfs
     /sbin/chkconfig  nfs  on
  

• Start the NFS daemons. Enter at the command line on the master node and on each slave node:
  

     /sbin/service  nfs  start
  

• Generate the following temp directory on the master node and each slave node, at best on a separate partition:
  

     mkdir /scratch