Page History

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Use Cases

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• Provide support for distributed parallel processing by coupling each large raw data file a small metadata "manifest" file containing only offset pointers and filter criteria that allow a parallel processing node to <make XYZ decisions about how to carve up and process the data>

Concepts

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Xtc Detector Data Files

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(Note, this is a user-centric description of the data format, focusing on the most typically used parts of the API, and doesn't cover all of the structure and metadata present in the Xtc format. For eample, on disk, Xtc files do not begin with a Names block. For more detail, see Xtc Library Reference)

From a user's standpointFor typical user code, each file effectively begins with a set of data Names,

Xtc Manifest Files

Trying to work up a name for what we labeled "small data" on the whiteboard. "Small data" didn't seem like the right description.

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Redesigning Xtc for LCLS-II

(LCLS-I lessons learned)