Editing Cesca

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The main objective of the Centre de Supercomputació de Catalunya (CESCA) is to manage a large complex of calculation and communications systems to provide service to the university and the scientific community, based on three activity areas: the systems for scientific calculation and university information; the communications based on the Anella Científica and CATNIX management and the use and profit promotion of these technologies.

== Access ==

ssh -X -p 2122 user@hpc.cesca.cat <br>


To move files you can use: 

'''scp -P 2122''' user@hpc.cesca.cat:/cescascratch/user/ .

'''sftp -oPort=2122''' user@hpc.cesca.cat

== User details ==

The home directory is subject to a group disk quota. If you (or some of your running jobs) fills it, all your jobs will crash, as well as those from other users in the same group. All iciq users are currently in the same group. 

'''To avoid this problem, it is mandatory to make all disk consuming work (job submission, chk saving, etc.) in /cescascratch/$USER'''

Remember to transfer your files to another computer once the jobs are finished as the files not touch in the scratch directory are deleted periodically.

== Queues ==

Updated list of queues in the pdf available [[Image:Cesca.pdf]] and on this web page 
http://www.cesca.cat/ca/suport-a-l-usuari/usuaris-de-recerca/guies-manuals-i-preguntes-frequents

*To submit a job, you can chose between:

a) bsub < script.file

b) When using one of the Gaussian scripts detailed below, to submit an input called input_name.com use: script.sh input_name

*To view running jobs, you can use either bjobs

*To delete jobs, bkill job_id

== Gaussian03 scriptfile ==

* large queue [[g03_large.sh]]

* parallel queue [[g03_par4.sh]]

== Gaussian09 scriptfile ==

*large queue [[g09_large.sh]]

== ADF scriptfile ==

* large queue [[adf08_large.sh]]

== HARDWARE ==

CESCA has at its disposal seven high performance computers:

 '''Hewlett-Packard N4000:''' 8 processors PA8500 (440 MHz), 4 GB of main memory, 227 GB of hard disk, 
 with a peak performance (Rpeak) of 14.08 Gflop/s and a maximum performance (Rmax ) of 10.22 Gflop/s.
 
 '''Compaq AlphaServer HPC320:''' 8 nodes ES40 (4 EV68, 833 MHz, 64 KB/8 MB), 28 GB of main memory, 892 GB 
 of hard disk, with Rpeak of 53.31 Gflop/s and Rmax of 40.84 Gflop/s, interconnected by a Memory 
 Channel II of 100 MB/s.
 
 ''' Beowulf de Compaq:''' 8 nodes DS10 (1 EV67, 600 MHz, 64 KB/2 MB), 4 GB of main memory, 291 GB of hard 
 disk, with Rpeak of 9.60 Gflop/s and an estimated Rmax of 7.68 Gflop/s , interconnected by a 
 Myrinet of 2 Gbps.
 
 '''HP AlphaServer GS1280:''' 16 processors 21364 EV7 (1,150 MHz, 64 KB/1.75 MB), 32 GB of main memory, 
 655 GB of hard disk, with Rpeak of 36.80 Gflop/s and Rmax of 31.28 Gflop/s.
 
 '''HP rx2600:''' 2 processors Itanium2 (1,000 MHz, 32 KB/256 KB/3 MB), 2 GB of main memory, 146 GB of 
 hard disk, with Rpeak of 8.00 Gflop/s and an estimated Rmax of 7.20 Gflop/s.
 
 '''SGI Altix 3700 Bx2:''' 128 processors Itanium2 (1.6 MHz, 16 KB/256 KB/6 MB), 384 GB of main memory, 
 6.13 TB of hard disk, with Rpeak of 819.20 Gflop/s and an estimated Rmax of 720.60 Gflop/s.
 
 '''HP CP4000:''' 16 nodes DL145 G2 (2 AMD64 Opteron 275 dual core, 2.2 GHz, 64 KB/1 MB each core), 256 GB 
 of main memory, 4.56 TB of hard disk, with Rpeak of 281.60 Gflop/s and an estimated Rmax of 177.41 
 Gflop/s, interconnected by 3 GigabitEthernet (one external and two internal, one of the latest for 
 computing and the other one for management)

http://www.cesca.es/sistemes/supercomputacio/que/index.html

==SOFTWARE==

http://www.cesca.es/sistemes/supercomputacio/programari/soft.html

==HOWTOs==

'''How to convert a file.chk into file.fchk'''

To do this you have to be in your directory in /cescascratch/ and check in which machine the job has been computed (hint: take a look at the end of the file) then connect to this particular machine (cadi...) and you have to write the following: 

  module avail
  module load gaussian/g03c2 
  formchk file.chk file.fchk

The file.fchk with the formatted version of the checkpoint file will be available.
This is the file you need for further density plot generation.

'''How to submit a job on Prades nodes'''

The additional line is needed to submit jobs to nodes on prades

 echo '#BSUB -R select[g09a2&&prades] span[hosts=1]' >>$1.cmd

the span[hosts=1] command means that you will wait until processors are free on a single node of prades, not several nodes (also make sure you only send to parallel 4 or 8 queues as there are only 8 cores on the prades nodes)