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askingforsupport:start [2015/06/03 10:15]
andyr [Enabling CHPC staff to log in as you and run jobs]
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-====== How to ask for help ====== 
  
-===== The Help Desk ===== 
-If you need assistance, please go to [[http://www.chpc.ac.za/index.php/support-resources/log-a-support-query|the support query page]].  However, before you do that, please ensure that you have crucial information available, and include it in your submission. 
- 
-===== Please RTFM (Read The Fine Manual) ===== 
-Before submitting the support request, please take a moment to read whatever relevant documentation is available on [[http://wiki.chpc.ac.za|the CHPC Wiki]].  The Wiki is updated as things change and we become aware of existing difficulties, solutions and workarounds.  Please check back often. 
- 
-===== Some hints on resolving your difficulty ===== 
-Here are some things to try: 
-  * PBSPro has replaced Moab as the job scheduler.  msub does not work any more, you need to use qsub. 
-  * The syntax of a PBSPro job script is similar to that of a Moab script, but not identical.  Please look at the examples on the [[http://wiki.chpc.ac.za|Wiki]]. 
-  * PBSPro syntax is also not identical to PBS. 
-  * PBSPro requires you to change to the working directory with a ''cd'' command.  There is no -d option. 
-  * Use ldd to check if the executable can link to the correct libraries.  If it cannot find the libraries, it may be necessary to load the required modules. 
-  * Neither $PBS_O_WORKDIR, $PBS_WORKDIR nor $PBS_JOBDIR will know automatically what your working directory is.  If you do not set these explicitly, they will have no values. 
-  * Please put some effort into estimating and requesting a realistic Walltime.  If you ask for much more than you really need, the scheduler will have to wait longer in order to find a large enough gap. 
- 
-===== Information to include in your support query ===== 
-Please include the following information where relevant: 
-  * Your CHPC login name 
-  * Your affiliation (company, university, institute, etc.) 
-  * A one-line summary of the project that you are working on 
-  * The software that you are using 
-  * The directory in which your troublesome project is located 
-  * The language in which the code was written 
-  * The compiler used 
-  * Which MPI is being used? (OpenMPI, MPICH2, etc ....) 
-  * Are you using thread-level parallelisation such as OpenMP? 
-  * Which modules are you loading? 
-  * When was the code last compiled? 
-  * Does the code work properly on a single workstation or cluster node? 
-  * Has it worked before on distributed parallel? 
-  * Any other relevant information 
- 
-===== Enabling CHPC staff to log in as you and run jobs ===== 
- 
-Sometimes the only way issues can be resolved is to have someone log in as you. 
- 
-**Never** give anyone else your password. 
- 
-What you **can** do is add their ssh keys to your account - which you can remove later. See [[askingforsupport:keys|adding ssh keys]] to use this. 
/app/dokuwiki/data/attic/askingforsupport/start.1433319357.txt.gz · Last modified: 2021/12/09 16:42 (external edit)