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Operating System - Tru64 Unix
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TruCluster and Standalone system I/O performance

Occasional Contributor

TruCluster and Standalone system I/O performance

Hello ,

 Does Anyone know the difference, esp. in performance, between the AdvFS in standalone system and in TruCluster environment?

We run the same program on a standalone system and single node TruCluster system(created from the standalone sytem).  The performance differed much as following:

(1) the main program:

#include <fstream>

#include <stdio.h>

#include <iostream> 

using namespace std; 

int main(int argc,char **argv)


   ofstream outfile(argv[1]);

   int loonu ;

   for ( loonu = 0; loonu != 1000000; loonu++ )


       outfile << " " << loonu <<  " All of the output is going here-------------------------------" <<endl;


   int ret;

   return 0;


(2) the result on standalone system:

# time ./main new.txt

real    0m11.58s

user    0m3.13s

sys     0m8.43s

 (3) the result on singel node cluster system:

# time ./main new.txt

real    0m26.08s

user    0m3.58s

sys     0m22.46s

Thanks for your reply.