[Quickfix-developers] Quickfix/J FileStore performance

[bmazlish <bma...@ya...>]

I am trying to understand the performance hit I get by using a FileLogStore
in quickfix/J.  In reading through the archives, the filestore appears to
add a marginal performance hit (message by Oren Miller dated 8-8-2006).
However, this is not my experience with quickfix/j.  In order to test this
out, I turn off all logging so that the only i/o is the messagestore.  When
I run 5000 new order singles through my test program, each call to
Session.sendToTarget takes under a millisecond when using a MemoryStore.
However, when I replace the MemoryStore with a FileStore my performance
drops and each call takes ~75 milliseconds for each call.  In digging
through the code, it appears that the randomaccessfiles are being
initialized with the "rwd" mode -- thus requiring every message to get
written to disk.  
 
I have two questions:
 
1- Is 75 ms reasonable?  It seems far greater than the stats I have seen
from this list (presumably C version)-- is this a java vs C issue?  Or
potentially how randomaccessfile's are implemented in java?
 
2- If i were to change the constructors of the RandomAccessFiles to just use
"rw" mode, I believe I would be safe as long as the OS doesn't crash.  Is
this correct?  
 
Thanks for your help.
 
I am running this on an HP DL145 server class machine running fc4 with
hardware raid scsi drives and JVM 1.5.11.