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database:database [2010/05/12 18:15] – nchiapdatabase:database [2012/05/29 20:13] (current) – [How to find the tag corresponding to a dataset] decianm
Line 16: Line 16:
 ===== How to access the database in the options file ===== ===== How to access the database in the options file =====
 Do Do
-<code>+<code python>
 from Configurables import CondDB, CondDBAccessSvc from Configurables import CondDB, CondDBAccessSvc
 CondDB(UseOracle = False) CondDB(UseOracle = False)
Line 22: Line 22:
 CondDB().addLayer(CondDBAccessSvc("DB",ConnectionString=connection)) CondDB().addLayer(CondDBAccessSvc("DB",ConnectionString=connection))
 </code> </code>
 +
 +===== How to use the latest tag =====
 +Do
 +<code python>
 +CondDB().UseLatestTags = ["2011"] 
 +</code>
 +if you want to use the latest tag for 2011 data. 
 +For **real data** it should always be safe to use the latest tag (this is **not** the case for MC)
 +
 +===== How to find the tag corresponding to a dataset =====
 +In the bookkeeping-browser: First click on ''Advanced Queries'', then navigate yourself to the production name (for example ''Stripping 17b'') and then right-click to get to ''More Information''. There you should be able to read of the database tags.
 +
 +===== Where to find the description of the official tags =====
 +Here: http://lhcb-release-area.web.cern.ch/LHCb-release-area/DOC/dbase/conddb/release_notes.html
database/database.1273680908.txt.gz · Last modified: by nchiap

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