FYI: Speed Test BDB to FSFS

["Kahn, Peter" <Pe...@ironmountain.com>]

Here are the results of my speed test comparison between FSFS and BDB.
I do not know if it will be of much use to you all as every environment
cab be different.

OS: FC4 - 2.6.12 i686 i686 i386 GNU/Linux
2GB ram, 16k RPM SCSI disks

SVN: version 1.2.1 (r15230)
Berkeley 4.3
 
Test Specs:

	 For each test in the suite 

	*	repeat 50 times with a 40 MB directory of 1000+ files 
	*	report average time to complete 
	*	Checkout - checkout directory at the HEAD revision 

			note: export is not tested as it performs same
basic task as checkout 

	*	Checkout Historical - checkout directory at revision
20000 
	*	Commit Add - checkout directory at the HEAD revision,
add 50 files, commit 
	*	Commit Delete - checkout directory at the HEAD revision,
delete 50 files, commit 
	*	Commit Modify - checkout directory at the HEAD revision,
modify 50 files, commit 

Results:
Type 	Checkout @ Head 	Checkout @ 20000 	Commit - Add 50
Commit - Mod 50 	Commit - Del 50 	
BDB 	9.050940 	61.517000 	47.112200 	29.894040
32.429880 	
FSFS 	9.043580 	61.420960 	46.786760 	29.290980
32.930660 	
Difference BDB to FSFS 	-0.01 	-0.1 	-0.33 	-0.6 	0.5 	

The average change in performance was an improvement of .11 seconds. If
we extrapolate this to checkouts and actions performed on a 1GB scale we
see an average improvement of 2.72 seconds. This change amounts to a
very small improvement for all categories except for deletes which are
disimproved. 

The only thing that could be a potential problem would be the mass
deletion of files, which isn't really anything I'm worrying about.

--
Peter Kahn
peter.kahn@ironmountain.com
IM: pkahn@imserver, citizenkahn@jabber80.com,
citizenkahn@googletalk.com, citizen_kahn@yahoo.com
Iron Mountain Digital




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