Wiki source code of ComputingResourcesUserGuide
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10.1 | 1 | = Brief Guide to Computing Resources at FLASH = |
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6.1 | 4 | == Introduction == |
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18.2 | 6 | As explained in the [[User overview>>doc:FLASHUSER.Data Acquisition and controls.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:FLASHUSER.Data Acquisition and controls.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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6.1 | 9 | == Access to the Maxwell cluster == |
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18.2 | 11 | The [[Maxwell Cluster>>https://docs.desy.de/maxwell/||rel="nofollow" shape="rect"]] is a powerful farm of inter-connected PC nodes running Scientific GNU/Linux. **To access the cluster you need a DESY AFS computing account or a so called scientific account (PSX).** |
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7.1 | 13 | {{info title="PSX account"}} |
| 14 | The scientific (internally called: PSX) account is a "real" account that is needed to be able to log into DESY computers ( mainly used for Maxwell). This is different from the[[ DOOR>>url:https://door.desy.de/door/index.php||shape="rect"]] account that you need for administrative purposes to be registered for the experiment, do safety training etc. | ||
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16.1 | 16 | To get a PSX account please talk to your local contact well before the beamtime. |
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7.1 | 17 | {{/info}} |
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18.3 | 19 | * To connect to the Maxwell cluster as PhotonScience user (or staff) please have a look to the [[Photon Science Resources - Maxwell >>https://docs.desy.de/maxwell/documentation/photon_science_resources/||shape="rect"]] pages. |
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16.1 | 20 | * From outside the DESY network ~-~- eduroam or the DESY guest network are considered to be outside ~-~- then you can SSH tunnel your connection through **[[max-display.desy.de>>url:https://confluence.desy.de/display/MXW/Interactive+Login||shape="rect"]]**{{code language="none"}}{{/code}}. |
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18.2 | 22 | {{info title="login with functional accounts"}} |
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15.1 | 23 | **Note**: Please, always do use your personal account to work on the Maxwell cluster or any central DESY computing resources. Don't use the functional accounts like vuvfuser or bl1user. Using functional accounts on shared resources causes many difficult to predict problems, even if it might appear to work for you in the beginning. Also, **never** try to login to **bastion **{{code language="none"}}{{/code}}or **max-display**{{code language="none"}}{{/code}} using one of the functional accounts. |
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7.1 | 24 | {{/info}} |
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7.1 | 26 | == Maxwell cluster == |
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18.3 | 28 | The extensive documentation can be found at [[Maxwell Cluster>>https://docs.desy.de/maxwell/||shape="rect"]] |
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18.3 | 30 | 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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