Usage of CMS T3

CMS users now can login to the new user interface (cmsui01.ihep.ac.cn) to access the T3 resources and grid resources(including T2_Beijing).

Accounts

Each IHEP cms member can log in cmsui01 with afs acount. if any problems with afs acount, please refer to Yangyi(yy@ihep.ac.cn, 6007).
When user enters, the system goes directly to afs home directory. Since the space of afs home directory is too limited(500MB), we define another $HOME directory for IHEP CMS users, which holds totally 500GB capacity in all. Therefore, users now have two $HOME directory: local one and afs one.

• local: /home/cms/<username>
• afs: /afs/ihep.ac.cn/users/z/zhangxm

Disk space

• There are three kinds of disk space seperately for home, software, data

   home: /home/cms/<username>, about 466GB, each 40GB
   software: /cms/cmsd01/public/cms_software
   data: /cms/cmsd01, /cms/cmsd02, 10TB totally  

CPU

• There are 64 cpu cores for work nodes in the T3 farm which is able to run 64 jobs almost. Another server is used as user interface.

Software

• The CMSSW software is distributed into three locations.

   CERN: /afs/cern.ch/cms
   T2_Beijing: /opt/exp_soft/cms
   T3:/cms/cmsd01/public/cms_software  

• To get the versions list in T2_Beijing, please do the following:

   export VO_CMS_SW_DIR=/opt/exp_soft/cms
   source $VO_CMS_SW_DIR/cmsset_default.sh
   scramv1 list -c CMSSW

Grid jobs

UI(cmsui.ihep.ac.cn) can also do the job submission to grid. You must get your proxy first

• voms-proxy-init --voms cms

Now you can use crab to do the submission

• crab -create -submit 1

Batch jobs

To submit batch jobs:

   # ssh cmsui01.ihep.ac.cn
   # cd /home/cms/YOUR_ACCOUNT
   # qsub -q cmsq YOUR_JOB_SCRIPT

To check the status of the jobs you submitted.

   # qstat -u YOUR_ACCOUNT

To retrive job outputs, it's very simple:

   #ls 
   #vi <JOBID>.OU
   #vi <JOBID>.ER

The files with .OU extension are the job outputs and files with .ER are the error logs.

Please feel free to give some comments.