fault tolerant processing

From: Valeriy Onuchin (onuchin@emcal06.rhic.bnl.gov)
Date: Sun Mar 07 1999 - 23:59:09 MET


Hi Rooters!
We are using ROOT for online monitoring
http://emcal06.rhic.bnl.gov/~onuchin/Sproot/html/USER_Index.html

 One of the main our problems is providing 
fault tolerant processing =
providing recovery from system/ROOT/process failure.

 If anybody has solutions or experience how to deal with it ?

 With best regards,			Valery

P.S.
 Suppose similar problems must be in offline processing too,
e.g. AtlasFast and Star have a chain of makers, 
what do you do when one of the makers crashed your root session?


 ... and suggestion
we are using TMapFiles for local storage of processed data
http://emcal06.rhic.bnl.gov/~onuchin/Sproot/html/DbManager.html
after introducing TMapRec it became possible to loop over
objects in TMapFile ,
   
 but could you(Fons) change   TMapFile:AcquireSemaphore()
and TMapFile::ReleaseSemaphore() from protected to public ?



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