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Memory management and non-MapR services on nodes

Question asked by jacques on Jul 15, 2011
Latest reply on Jul 15, 2011 by yufeldman
MapR appears to make the general assumption that MapR nodes won't run any major non-MapR services.  This is specifically related to it using 'allish' memory not associated to one of it services when allocating map and reduce task memory.  If I have a fairly heavy (memory-wise) service running on some nodes, can I tell MapR to do it's standard warden calculations but consider a set megabytes of memory offlimits?  For example, if I have 32gb of memory but one of my non-MapR services utilizes 8gb of memory, is there a way to tell MapR to operate as if there were only 24gb?  Or at this point, do I have manage all the memory settings manually?