gistfile1.txt

❯ iozone -t 4 -s 1G -r 128 -b scratch.xls
	Iozone: Performance Test of File I/O
	       Version $Revision: 3.507 $
		Compiled for 64 bit mode.
		Build: linux-AMD64 

	Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
	            Al Slater, Scott Rhine, Mike Wisner, Ken Goss
	            Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
	            Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
	            Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
	            Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
	            Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer,
	            Vangel Bojaxhi, Ben England, Vikentsi Lapa,
	            Alexey Skidanov, Sudhir Kumar.

	Run began: Wed Aug 27 13:08:51 2025

	File size set to 1048576 kB
	Record Size 128 kB
	Command line used: iozone -t 4 -s 1G -r 128 -b scratch.xls
	Output is in kBytes/sec
	Time Resolution = 0.000001 seconds.
	Processor cache size set to 1024 kBytes.
	Processor cache line size set to 32 bytes.
	File stride size set to 17 * record size.
	Throughput test with 4 processes
	Each process writes a 1048576 kByte file in 128 kByte records

	Children see throughput for  4 initial writers 	= 14793071.25 kB/sec
	Parent sees throughput for  4 initial writers 	= 10757883.10 kB/sec
	Min throughput per process 			= 3593275.25 kB/sec 
	Max throughput per process 			= 3758096.25 kB/sec
	Avg throughput per process 			= 3698267.81 kB/sec
	Min xfer 					= 1002624.00 kB

	Children see throughput for  4 rewriters 	= 14924681.25 kB/sec
	Parent sees throughput for  4 rewriters 	= 13856973.41 kB/sec
	Min throughput per process 			= 3497324.00 kB/sec 
	Max throughput per process 			= 4006387.00 kB/sec
	Avg throughput per process 			= 3731170.31 kB/sec
	Min xfer 					=  915456.00 kB

	Children see throughput for  4 readers 		= 23576558.00 kB/sec
	Parent sees throughput for  4 readers 		= 23519805.94 kB/sec
	Min throughput per process 			= 5870432.00 kB/sec 
	Max throughput per process 			= 5913500.50 kB/sec
	Avg throughput per process 			= 5894139.50 kB/sec
	Min xfer 					= 1041408.00 kB

	Children see throughput for 4 re-readers 	= 23360120.50 kB/sec
	Parent sees throughput for 4 re-readers 	= 23304138.70 kB/sec
	Min throughput per process 			= 5762200.50 kB/sec 
	Max throughput per process 			= 5925363.50 kB/sec
	Avg throughput per process 			= 5840030.12 kB/sec
	Min xfer 					= 1019904.00 kB

	Children see throughput for 4 reverse readers 	= 24734029.50 kB/sec
	Parent sees throughput for 4 reverse readers 	= 23939032.27 kB/sec
	Min throughput per process 			= 6109503.00 kB/sec 
	Max throughput per process 			= 6276944.00 kB/sec
	Avg throughput per process 			= 6183507.38 kB/sec
	Min xfer 					= 1020928.00 kB

	Children see throughput for 4 stride readers 	= 3277570.88 kB/sec
	Parent sees throughput for 4 stride readers 	= 3276389.19 kB/sec
	Min throughput per process 			=  808294.06 kB/sec 
	Max throughput per process 			=  835771.75 kB/sec
	Avg throughput per process 			=  819392.72 kB/sec
	Min xfer 					= 1014144.00 kB

	Children see throughput for 4 random readers 	= 3742946.31 kB/sec
	Parent sees throughput for 4 random readers 	= 3741603.83 kB/sec
	Min throughput per process 			=  920203.75 kB/sec 
	Max throughput per process 			=  945678.56 kB/sec
	Avg throughput per process 			=  935736.58 kB/sec
	Min xfer 					= 1020416.00 kB

	Children see throughput for 4 mixed workload 	= 3396237.38 kB/sec
	Parent sees throughput for 4 mixed workload 	= 3167943.22 kB/sec
	Min throughput per process 			=  773184.12 kB/sec 
	Max throughput per process 			=  938304.56 kB/sec
	Avg throughput per process 			=  849059.34 kB/sec
	Min xfer 					=  864256.00 kB

	Children see throughput for 4 random writers 	= 2795908.94 kB/sec
	Parent sees throughput for 4 random writers 	= 2533639.51 kB/sec
	Min throughput per process 			=  643243.19 kB/sec 
	Max throughput per process 			=  737507.75 kB/sec
	Avg throughput per process 			=  698977.23 kB/sec
	Min xfer 					=  914560.00 kB

	Children see throughput for 4 pwrite writers 	= 13300636.00 kB/sec
	Parent sees throughput for 4 pwrite writers 	= 11735339.59 kB/sec
	Min throughput per process 			= 3175451.50 kB/sec 
	Max throughput per process 			= 3449806.00 kB/sec
	Avg throughput per process 			= 3325159.00 kB/sec
	Min xfer 					=  965632.00 kB

	Children see throughput for 4 pread readers 	= 26919406.50 kB/sec
	Parent sees throughput for 4 pread readers 	= 26831995.50 kB/sec
	Min throughput per process 			= 6334394.00 kB/sec 
	Max throughput per process 			= 6909249.00 kB/sec
	Avg throughput per process 			= 6729851.62 kB/sec
	Min xfer 					=  961536.00 kB

	Children see throughput for  4 fwriters 	= 14126339.25 kB/sec
	Parent sees throughput for  4 fwriters 		= 13354042.79 kB/sec
	Min throughput per process 			= 3465449.75 kB/sec 
	Max throughput per process 			= 3643482.25 kB/sec
	Avg throughput per process 			= 3531584.81 kB/sec
	Min xfer 					= 1048576.00 kB

	Children see throughput for  4 freaders 	= 25282351.00 kB/sec
	Parent sees throughput for  4 freaders 		= 25053641.32 kB/sec
	Min throughput per process 			= 6271046.00 kB/sec 
	Max throughput per process 			= 6350540.50 kB/sec
	Avg throughput per process 			= 6320587.75 kB/sec
	Min xfer 					= 1048576.00 kB



"Throughput report Y-axis is type of test X-axis is number of processes"
"Record size = 128 kBytes "
"Output is in kBytes/sec"

"  Initial write " 14793071.25 

"        Rewrite " 14924681.25 

"           Read " 23576558.00 

"        Re-read " 23360120.50 

"   Reverse Read " 24734029.50 

"    Stride read " 3277570.88 

"    Random read " 3742946.31 

" Mixed workload " 3396237.38 

"   Random write " 2795908.94 

"         Pwrite " 13300636.00 

"          Pread " 26919406.50 

"         Fwrite " 14126339.25 

"          Fread " 25282351.00 


iozone test complete.