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changes.mady.by.user Omar Quijano

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  • The FFB currently offers the fastest file system (WekaIO on NVME disks via IB HDR100) of all LCLS storage systems however it size is only about 400 500 TB.
  • The raw data will be kept on the FFB a week after an experiment ends however for data intensive experiments files might be purged even before an experiment ends.
    Files deleted from the FFB will be available only on one of the offline systems (psana, SDF, or NERSC).
  • The raw data are copied to the offline storage system and to tape immediately, i.e. in quasi real time during the experiment, not after they have been deleted from FFB.
  • The users generated data created in the scratch/ folder are moved to the offline storage when the experiment is deleted from the FFB.For the
  • When running on the FFB the xtc/ and scratch/ folder should be used for reading and writing ( below /cds/data/drpsrcf/...). The Lustre ana-filesystems should (must) not be used (only exception is calib/, see below).
  • The LCLS Jupyterhub allows to start notebooks on the psffb nodes which will have access to the data and the FFB scratch folder of an experiment time being, the new FFB system will be available only for FEH experiments. NEH experiments will still rely on psana resources.

You can access the FFB system from pslogin, psdev or psnx with:

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