ntpdate no server suitable for synchronization found

I was configuring one of head node of our cluster server to synchronise from our time server in our organisation, and in turn the head node becomes a NTP Server for the compute nodes that on a private IP addresses. As I was configuring the compute nodes and encounter "ntpdate[4933]: no server suitable for synchronization found"

I configured the ntp servers and ntp clients according to Setting up NTP Server for Local Network. And yet the error remain unresolved. Finally, I came across a solution

1. Open /etc/ntp/step-tickers and replace with the name of your local NTP Server
2. Open /etc/ntp/ntpservers and replace with the name of your local NTP Server
3. Restart your ntp services. You should eradicate the problem

Configuring NFS Server for Performance

Finally, a more detailed writeup on NFS configuration which I was hoping to blog. Finally it is done.
Do read Configuring NFS Server for Performance

Configure TCP for faster connections and transfers

On a default Linux Box, the TCP settings may not be optimise for “bigger” available network bandwidth connections and transfer available for 100MB+. Currently, most TCP settings are optimise for 10MB settings. For more information, on how to configure, read my Linux Cluster Blog Configure TCP for faster connections and transfers

NFS Client Recommended Configuration

NFS is one of the most commonly used file networked file system. Quite often we build it ourselves using standard out-of-the-box hardware we find. This NFS Client Recommended Configuration (my blog too) shows in slightly more details how to configure the mounting of the NFS clients

Compiling with MPI Parallel Library

This is a good site for MPICH Parallel Library Compilation from Duke University