Title: Performance Impact of Fragmentation under Windows NT

Date: 29 August 1994
_______________________________________________________________________________

These tests were run on a DELL 486-66 under Windows NT build 756 with a
1GB Micropolis 8.5ms SCSI disk in a 100MB NTFS partition through an
Adaptec AHA1540 5MB/s controller. The test program opens the file, reads it
into a 64k buffer, and closes it. During the tests there were no other
applications open. Disk caching was disabled. During the file accesses the test
program does nothing else - the system time is read before and after for timing
analysis.

10k001 is a 10kb file with 1 extent; 10k004 has 4. The Reads column shows how
many times the file was read. Tot.ms is total ms for the run. Avg is average
ms per read. Percentage is access ratio relative to the unfragmented control.

  Filename	Reads	Tot.ms	Avg	Percentage
	10kb:					
f:10k001	1000	22278	22	 	
f:10k004	1000	59612	59	267.58%

	64kb:					
f:64k001	100	5594	55		
f:64k002	100	7841	78	140.17%
f:64k004	100	8516	85	152.23%
f:64k005	100	9059	90	161.94%
f:64k014	100	12257	122	219.10%
f:64k018	100	13478	134	240.94%

	500kb:					
f:500k001	100	30018	300		
f:500k002	100	32500	325	108.27%
f:500k003	100	33342	333	111.07%
f:500k005	100	37780	377	125.86%
f:500k008	100	45088	450	150.20%
f:500k012	100	42238	422	140.71%
f:500k043	100	51449	514	171.39%

	1mb:					
f:1m001 	100	61129	611		
f:1m002 	100	63391	633	103.70%
f:1m007 	100	70109	701	114.69%
f:1m012 	100	68253	682	111.65%
f:1m022 	100	71197	711	116.47%
f:1m111 	100	103486	1034	169.29%

	3.3mb:					
f:3_3m001	100	187899	1878		
f:3_3m241	100	303124	3031	161.32%

	10mb:					
f:10m001	10	58159	5815		
f:10m010	10	61572	6157	105.87%
f:10m050	10	62661	6266	107.74%
f:10m079	10	62655	6265	107.73%
f:10m163	10	66002	6600	113.49%
f:10m214	10	69149	6914	118.90%
f:10m341	10	73918	7391	127.10%
f:10m503	10	81916	8191	140.85%



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