In orangefs-2.8.3-EXP, I modified the interface of pvfs2-touch.c , after 
modified , when I use the command pvfs2-touch A , it will create 10000 
files(A1,A2,.....A10000).

        Then I installed the orangefs on a cluster that has 3 MetaData Servers 
, 1 Data Server , and 2 Clients. and no two of these servers are on the same 
machine . And I conducted two different types of tests ,  just as follows :

         Firstly I only use one client to create 10000 files , and it costs 
about 280s.

         Sencondly, I use mpi to let the two clients create 10000 files each at 
the same time , and it costs about 330s.

         I have seen a paper before , that talk about the average file creation 
throughput with different servers in pvfs2 , and it said that the throughput of 
pvfs2 is about 700 creates per seconds on two servers and about 1100 creates 
per seconds on three servers.But in my test, it only has the throughtput of no 
more than 100.

         So I want to know why ?
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