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Last modified by sndueste on 2026-01-09 15:35
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1 1  = Brief Guide to Computing Resources at FLASH =
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4 -(% style="color: rgb(231, 76, 60); font-size: 24px" %)**TO BE UPDATED**
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7 7  == Introduction ==
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9 9  As explained in the [[User overview>>doc:FS-FLASH USER tmp.Data Acquisition and controls 1.DAQ and controls overview.WebHome]] page the data recorded at FLASH is stored in an internal DAQ format (.raw) which is converted with a few minutes delay to easily accessible HDF5 ([[doc:FS-FLASH USER tmp.Data Acquisition and controls 1.DAQ and controls overview.Offline data analysis (DAQ).The FLASH HDF5 structure.WebHome]]) files which are the basis for data analysis. These  files are stored on the [[ASAP3 File System>>https://docs.desy.de/asap3/||rel="nofollow" shape="rect"]] which is accessible from DESYs  [[Maxwell Cluster>>https://docs.desy.de/maxwell/||shape="rect"]] which is recommended to be used for the analysis by users. H5py and Pandas allow efficient access to the recorded data in the HDF5 files. In addition the HDF5 files are accessible from the beamline computers and via a web interface:  [[Gamma Portal>>url:https://gamma-portal.desy.de||shape="rect"]]
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33 33  In particular we want to mention the option [[JupyterHub2 on Maxwell>>https://docs.desy.de/maxwell/services/jupyterhub/]] , for more advanced computing demands [[Running Jobs on Maxwell.>>https://docs.desy.de/maxwell/services/]]
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33 +Typically the Jupyter notebook starts at your home directory and you have to create a (soft) link to your beamtime folder: open a terminal window (File->New-> Terminal) and create the link via :
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35 +{{code language="none"}}> ln -sn beamtime path linkname{{/code}}
36 +e.g.
37 +~> ln -sn /asap3/flash/gpfs/fl23/2025/data/11024321/ ~~/beamtime_11024321 
38 +Then a “beamtime_11024321” folder should appear in your home directory.
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