VSphere Edition Comparison

 Since the advent of the VSphere 5, there were some changes in which vmware work out its licenses. I find this chart from VMware Compare Edition helpful when you intend to select the

Compiling AMBER 10 with Intel XE Compiler and Intel MKL 10

If you wish to compile an older version of AMBER such as AMBER 10 with the more up-to-date version of Intel XE and MKL 10, I hope you will find the writeup at my other blog linuxcluster.wordpress.com helpful.
See Compiling AMBER 10 with Intel XE Compiler and Intel MKL 10

Building SCALAPACK 2.0.1 with intel compiler

I have written an simple entry of installing scalapack 2.0.1 on CentO 5 on Linux Cluster. For more information, do take a look at   Building SCALAPACK 2.0.1 with Intel Compiler

Using nslookup to help diagnose DNS resolving issue

If you are having issues to resolve your servers to the designated name servers, you may want to use these 3 tools (nslookup, dig, host) which can help to diagnose the DNS resolution. This entry mentions only nslookup.

Utility 1: nslookup
nslookup is one useful tools to assist in diagnosing problems with your resolving. Unfortunately, this niffy tools is already deprecated or in other words not actively maintained.

# nslookup -debug yournameserver.com

(-debug =  Turn on or off the display of the full response packet and any intermediate response packets when searching.)

# nslookup -debug -d2 yournameserver.com

(-d2 = Turn debugging mode on or off. This displays more about what nslookup is doing.)

Sample output on d2

lock_lookup dighost.c:3173
main parsing yournameserver.com
addlookup()
make_empty_lookup()
looking up starfruit.spms.ntu.edu.sg
setup_system()
create_search_list()
ndots is 1.
........
....... 
success
flush_server_list()
freeing commctx
freeing socketmgr
freeing timermgr
destroy DST lib
detach from entropy
unlock_lookup dighost.c:3219

Resources:

1. Tracking "Server Failed" Error from DNS

Article - No Free Lunch for Intel MIC (or GPU's)

This is an interesting article No Free Lunch for Intel MIC (or GPU's) from Steve Scott on Nvidia site. He mentioned there are 3 major consideration why porting over to MIC will be more challenging than we thought out to be. He mentioned several pointers to look out for that imhibit mass migratio to MIC. Take a read. But do note it is written by NVIDIA a competitor of MIC