= General structure =

The LHCbStripping is the procedure used to pass from raw data, which should never been accessed by analysts, to analysis datasets. The data selected by the Stripping procedure can be saved into two different formats: DST or MicroDST. DST contains all the information from the raw events, plus the candidates produced during the Stripping run. New candidates may be produced offline, tracks and events can be refitted and detector studies can rely on the raw information as hits... MicroDST are smaller files which only contain information written during the Stripping. This is useful for analysis datasets which only need to be refined offline, but it is impossible to rerun combinatorics or to access detector information.

The amount of data which is saved by the Stripping is called retention. Due to physical disk-space limitations, a global retention of 5% is allowed. Give the huge number of Stripping algorithms (called Stripping Lines) the average retention for each Stripping Line is of 0.05%. This is an indicative number, WGs can have Stripping lines with higher retention, but obviously the less, the better.

Stripping Lines are collected in Stripping Streams. There are Leptonic, Dimuon, Bhadron, Charm, Calibration ... streams. If the stream name contains the "COMPLETEEVENT" keyword, the stream writes to DST, usually the analogue (without such a keyword) writes to MicroDST.

Streams are collected in Stripping versions. The naming convention for Stripping lines is updated here:

-- LucioAnderlini - 03-Sep-2012

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Topic revision: r1 - 2012-09-03 - LucioAnderlini
 
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