GPFS NSD Nodes stuck in Arbitrating Mode

One of our GPFS NSD Nodes are forever stuck in arbitrating nodes. One of the symptoms that was noticeable was that the users was able to log-in but unable to do a "ls" of their own directories. You can get a quick deduction by looking at one of the NSD Nodes. For this kind of issues, do a mmdiag --waiters first. There are limited articles on this

# mmdiag --waiters 

.....
.....
0x7FB0C0013D10 waiting 27176.264845756 seconds, SharedHashTabFetchHandlerThread: 
on ThCond 0x1C0000F9B78 (0x1C0000F9B78) (TokenCondvar), reason 'wait for SubToken to become stable'

References:

1. IZ17622: GPFS DEADLOCK WAITING FOR SUBTOKEN TO BECOME STABLE CAUSES HANG
2. GPFS File System Deadlock

For more information on the resolution, see  GPFS NSD Nodes stuck in Arbitrating Mode (Linux Cluster)

Convergence of Supercomputing and Extreme Big Data on the TSUBAME Supercomputer Exascale

I Saw this presentation by Satoshi Matsuoka, from the Tokyo Institute of Technology which shows how  Tokyo Institute of Technology converge HPC and Big Data. Do note that the presentation (pdf) is about 24MB.

Here is the links: http://www.opensfs.org/wp-content/uploads/2013/09/Matsuoka_TokyoTech_Tsubame.pdf

Error when installing xCAT 2.8.2

If you have error such as those below,

Error: Package: xCAT-2.8.2-snap201307222333.x86_64 (xcat-2-core)
Requires: conserver-xcat
Error: Package: xCAT-2.8.2-snap201307222333.x86_64 (xcat-2-core)
Requires: syslinux-xcat
Error: Package: xCAT-2.8.2-snap201307222333.x86_64 (xcat-2-core)
Requires: elilo-xcat
Error: Package: xCAT-2.8.2-snap201307222333.x86_64 (xcat-2-core)
Requires: ipmitool-xcat >= 1.8.9
Error: Package: 1:xCAT-genesis-scripts-x86_64-2.8.2-snap201307222333.noarch (xcat-2-core)
Requires: xCAT-genesis-base-x86_64
Error: Package: xCAT-2.8.2-snap201307222333.x86_64 (xcat-2-core)
Requires: xnba-undi

Go to http://sourceforge.net/projects/xcat/files/yum/xcat-dep/rh6/x86_64/ and find the respective rpms that fit the package name

Coprocessors Programming Codebook and Parallel Universe Magazine By Intel

Intel has put a 16-pages code book titled - Application Optimization for Intel® Processors and Coprocessors Programming CodeBook. Explore some of the tools, techniques, and models for creating highly parallelized code optimized for Intel® Core™, Intel® Xeon® processors, or the Intel® Xeon Phi™ coprocessor.

Download the latest issue of The Parallel Universe magazine and explore the implications of real-time everything as high-performance computing (HPC) moves out of the science lab and onto Main Street. Check out the features in OpenMP* 4.0, discover what’s new in Intel® Cluster Studio XE 2013 SP1, learn techniques for ID’ing and correcting HPC application bottlenecks, and more

Compiling SQLite 3.8.1 on CentOS 5

Taken from Beyond Linux® From Scratch - Version 2013-11-30
SQLite 3.8.1

1. Download (HTTP): http://sqlite.org/2013/sqlite-autoconf-3080100.tar.gz
2. Download size: 1.9 MB

SQLite 3.8.1 Documents

1. Download (HTTP): http://sqlite.org/2013/sqlite-doc-3080100.zip
2. Download size: 4.1 MB

Compiling SQLite 3.8.1

# ./configure --prefix=/usr/local/sqlite-3.8.1 --disable-static        \
CFLAGS="-g -O2 -DSQLITE_ENABLE_FTS3=1 \
-DSQLITE_ENABLE_COLUMN_METADATA=1     \
-DSQLITE_ENABLE_UNLOCK_NOTIFY=1       \
-DSQLITE_SECURE_DELETE=1" &&
# make
# make install

Compiling SQLite Documents

# install -v -m755 -d /usr/local/sqlite-3.8.1/share/doc/sqlite-3.8.1 &&
# cp -v -R sqlite-doc-3080100/* /usr/local/sqlite-3.8.1/share/doc/sqlite-3.8.1

For more information: