ProCKSI

h1. 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_):

<pre>

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

</pre>

* Add the following to the end of _/etc/fstab_ on each slave node: 

<pre>

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

</pre>

* Modify _/etc/sysconfig/nfs_ on the master node in order to tune NFS by increasing the number of _nfsd_ threads:

<pre>

   RPCNFSDCOUNT=16

</pre>

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

<pre>

   /sbin/chkconfig  --add nfs

   /sbin/chkconfig  nfs  on

</pre>

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

<pre>

   /sbin/service  nfs  start

</pre>

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

<pre>

   mkdir /scratch

</pre>