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Recap of Data Access Methods See Chapter 1 of Data Analysis Guide and youtube videos!

Recap of Data Access Methods See Chapter 1 of Data Analysis Guide and youtube videos!. David R. Ardila User Support coordinator / NHSC Archive Scientist. Data Management. D ata management in Herschel i s complicated by the size of datasets

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Recap of Data Access Methods See Chapter 1 of Data Analysis Guide and youtube videos!

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  1. Recap of Data Access MethodsSee Chapter 1 of Data Analysis Guide andyoutube videos! David R. Ardila User Support coordinator / NHSC Archive Scientist

  2. Data Management • Data management in Herschel is complicated by the size of datasets • Everything is about making data management efficient • Do you really need big data sets in your disk?

  3. For most people, this is all you need. • Gets references to the data in HIPE and downloads data as needed • Useful for • Quick inspection • Data reduction • Does not save, unless you do it explicitly* • *of course, there is a way to override this! HSA getObservation(…,useHsa=True) Product Browser “Send to External Application” HIPE

  4. HSA getObservation(…,useHsa=True) Product Browser “Send to External Application” “Retrieve Products” HIPE Tar file in local disk getObservation() Use Navigator untar Directory in local disk • HSA to local disk • May be slow • But then you have the data • It allows you to bypass HIPE

  5. Local Pools (working directories in the local disk) saveObservation() saveProduct() Save Products GUI getObservation(…,useHsa=True) Product Browser HSA getObservation() Product Browser “Send to External Application” “Retrieve Products” HIPE HIPE Tar file in local disk getObservation() Use Navigator untar • Pools are good if: • You have a lot of data • That needs reprocessing Directory in local disk

  6. Local Pools (working directories in the local disk) saveObservation() saveProduct() Save Products GUI HSA getObservation(…,useHsa=True) Product Browser getObservation() Product Browser “Send to External Application” “Retrieve Products” HIPE HIPE Tar file in local disk getObservation(…, useHsa=True, save=True) getObservation() Use Navigator untar getObservation() Product Browser myHSA A type of pool. Unmodified data (or links) from HSA Directory in local disk

  7. Local Pools (working directories in the local disk) saveObservation() saveProduct() Save Products GUI HSA getObservation(…,useHsa=True) Product Browser “Send to External Application” getObservation() Product Browser “Retrieve Products” HIPE HIPE Tar file in local disk getObservation(…, useHsa=True, save=True) getObservation() Use Navigator untar getObservation() Product Browser myHSA A type of pool. Unmodified data (or links) from HSA Directory in local disk

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