User Documentation#

User accounts, emails, grid-certs, CMS VO membership etc.#

CMSSW, CRAB, Condor, running analysis jobs etc.#

Data file xfer, PhEDEx, Local Storage, FileMover etc.#

Got Questions ?#


CMS Physics Analysis at UW-HEP#

  1. Get an AFS Account on Wisconsin computers
  2. Request a Grid Certificate
  3. Get a HEP (Wisconsin) email Account
  4. Register with CERN starting from the “New Member Registration Form” (or pre-registration form) http://cms.cern.ch/iCMS/jsp/secr/reg/regCMS.jsp. The email you get after sending in the above form will ask for a fax or scanned email of the new member’s passport.
  5. Follow the advice by completing the registration form sent to you and instructions to contact CMS.Computing@cern.ch to setup a computer account. The form asks for your interests and activity details, among other basic information. You should receive the following instructions:#

    1. To open a Computer Account in CMS (group ZH)
    2. Send an e-mail to cms.computing@cern.ch with all the following information about yourself:
      1. Full family name
      2. First name
      3. Birth date (day-month-year)
      4. For those returning to CERN, your CERN id number if already known - your previous login name (if any, however old)
      5. Preferred login name (min 3, max 8 characters)
  6. Register with the CMS Virtual Organization (requires CERN registration to be completed)#

  7. CMSSW Offline Analysis WorkBook (some work can be done after getting AFS account but grid certificate is needed for using storage services)#

  8. Simulating Events & Creating Analyzer#

  9. Analyzing Events & Merging Final Files#

  10. FAQ#

Request datasets to the site via PhEDEx#

You can view the data currently hosted at our site here.#

To place a request to transfer data via PhEDEx, you will need your grid certificate to be in your browser. Follow these instructions to get your certificate if you don’t have it already.#

  1. Go to DAS and search for the dataset that you want.
  2. Choose the dataset from the search output.
  3. Check the dataset size and number of events.
    1. If the dataset is large and you don’t need all the events, select the link labeled “Block info” and copy the Block id (or ids) containing the smallest number of events you need.
    2. If the dataset is large and you must have all the events, check with help@hep.wisc.edu to get approval before submitting your PhEDEx request.
  4. Check the sites hosting the dataset (click the “Show” link). We have commissioned PhEDEx links with most of the T1 and T2 sites in CMS and you can see the link status listed here.
  5. Select the link labeled “PhEDEx” and provide your grid certificate when prompted.
  6. Under Data Items, verify that your desired dataset is listed. If you want to transfer a block, append the dataset name with a # and the block id. Multiple datasets (and multiple blocks) can be separated by a space. For example, to request two blocks:#

              /W1Jets_Pt0to100-alpgen/Spring10-START3X_V26-v1/GEN-SIM-RECO#4516424c-fb06-47e6-b991-a69c3c59bd31
              /W1Jets_Pt100to300-alpgen/Spring10-START3X_V26-v1/GEN-SIM-RAW#00f9d5ba-4265-422b-9dfa-34534dc8d5dc
    
  7. Under Destinations, select T2_US_Wisconsin.#

  8. Select these options from the drop down menus:#

  9. Enter a Comment regarding the reason you need the dataset transferred to the cluster.#

  10. Click the “Submit Request” button.#

  11. You will receive emails notifying you that you’ve made the request and whether or not your request was approved.#

  12. You can monitor the status of the transfer here, by providing the dataset name. Transfers typically take about a day, but can take several weeks in some special cases.#

  13. When you no longer need the dataset, please inform help@hep.wisc.edu so that the space can be used for other datasets.#

You can run over the data hosted at the site with CMSSW interactively, via Condor jobs, or via CRAB jobs.#

Transfer data via FileMover (limited use)#

FileMover is a utility that provides an interface to download individual files registered in DAS. The primary intention of this tool is to do a quick check of a few files from any dataset locally prior to using the entire dataset for analysis. It shouldn’t be used for downloading an entire dataset and in fact restricts users to 10 transfer requests in a 24 hour period. FileMover is available here and can be accessed using your Hypernews user account.#

To download a file :#

  1. Go to the DAS Discovery page and find your dataset.
  2. Click on the “LFNs: … plain” link to get a list of the files in the dataset and copy one of the file names.
  3. Paste the file name into FileMover in the “Request file via LFN” box, then click the Request button, and you will see outputs similar to the following appear at the bottom of the page
  4. If the file is available then the transfer will begin immediately and normally takes five to ten minutes to finish, if there are no issues, and you will see the outputs similar to the ones below appear in the page.
  5. Once complete, right click the “Download” link (appears next to the file name above) and select “Copy Link Location.”
  6. Copy the file using wget:#

    wget --no-check-certificate "https://cmsweb.cern.ch/filemover/download/mohapatr/0ED1D5D0-19A2-DF11-9AD6-003048CBA8E2.root" .
    

    (Just replace the appropriate link location for your file).#

  7. You can check the file using standalone Root or with a CMSSW job.#