PBS Environment Variables

In addition to the above, the following environment
variables will be available to the batch job.

PBS_O_HOST
the name of the host upon which the qsub command is running.

PBS_O_QUEUE
the name of the original queue to which the job was submitted.

PBS_O_WORKDIR
the absolute path of the current working directory of the qsub command.

PBS_ENVIRONMENT
set to PBS_BATCH to indicate the job is a batch job, or
to PBS_INTERACTIVE to indicate the job is a PBS
interactive job, see -I option.

PBS_JOBID
the job identifier assigned to the job by the batch system.

PBS_JOBNAME
the job name supplied by the user.

PBS_NODEFILE
the name of the file contain the list of nodes assigned
to the job (for parallel and cluster systems).

PBS_QUEUE
the name of the queue from which the job is executed.

Linux 下compiler 一覽

Linux 下compiler 一覽

	C	C++	F77	F90
GNU	gcc	g++	f77	N/A
PGI	pgcc	pgCC	pgf77	pgf90
Intel i368	icc	icc	ifc	ifc
Intel x86_64	ecc	ecc	efc	efc

What is MPICH

What is MPICH

MPI(Message Passing Interface) 為一種訊息傳遞標準, 提供一個可靠的傳遞介面, 讓各個node 作資料交換, 主要應用在異質網路叢集電腦系統上。 MPICH 是MPI-1 標準的實作, 包含了MPI 函式庫及編譯環境。

編譯及安裝

目前最新版本為 1.2.7p1, 可以在下方的網頁上找到
http://www-unix.mcs.anl.gov/mpi/mpich1/

作業系統以Linux 為主, MPICH 也有Windows 版本可以在下載網頁上找到。而compiler 以Linux 環境下常見的gcc 為主。

tar zxf mpich.tar.gz
cd mpich-1.2.7p1
./configure --prefix=/opt/mpich/gnu -rsh=ssh
make && make install

Compile MPI program
/opt/mpich/gnu/bin/mpicc -o hello hello.c