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Optimizing Partitioning for Subdetector Management in Data Acquisition Systems

This document explores the partitioning of subdetectors in data acquisition systems, emphasizing the natural units for partitions and the size limits for effective management. It suggests a hierarchical, tree-like structure for subdetectors where dynamic redefinition of partition units is possible, enabling operational flexibility. Specific recommendations include centralizing partition definitions and ensuring coherent management of read-out chains and environmental conditions. This approach facilitates dynamic handling of components like high voltage trips, improving system resilience and performance.

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Optimizing Partitioning for Subdetector Management in Data Acquisition Systems

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  1. Partitioning Assumptions: • Subdetectors are the natural units for partitions • The smallest sensible unit for a partition is a TTC zone (~40) • A subdetector is hierarchically organized in a tree-like structure • DCS can act on each branch and leave of this tree (down to individual channels) TDAQ WS: Global Issues, 24/4/2002, H.J.Burckhart

  2. Partitioning Questions (and suggestions): • Partitions have to be defined at one single place (suggest: DAQ) • From this place coherent booking of • (Part of ) subdetector(s) • read-out chain • environment conditions and services • Can partition units be statically defined, e.g. the 40 TTC zones? If yes: • DCS can arrange its state model accordingly • Should it be possible to dynamically (re-)define partitions? Suggest: yes. Example: • (part of) a subdetectors trips HV: • take this part out of the read out • recover • take it back into the read out TDAQ WS: Global Issues, 24/4/2002, H.J.Burckhart

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