有人用过iozone测试linux下的文件系统吗?
[zzi@ubuntu:~/tmp$ ./iozone -a -g 1m -b result.wks -+r -i0 -i1Iozone: Performance Test of File I/O
Version $Revision: 3.429 $
Compiled for 32 bit mode.
Build: linux
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.
Run began: Thu Nov 20 17:49:35 2014
Auto Mode
Using maximum file size of 1024 kilobytes.
Read & Write sync mode active.
Command line used: ./iozone -a -g 1m -b result.wks -+r -i0 -i1
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.
random random bkwd record stride
kBreclen writerewrite read reread read write read rewrite read fwrite frewrite freadfreread
64 4 47 4815258951728769
64 8 110 10219407822063600
64 16 203 19720648102211451
64 32 443 44422123492292300
64 64 760 76322919561834365
128 4 44 4616865221541439
128 8 94 9719692641830161
128 16 204 21721006411938879
128 32 394 44422024452329438
128 64 886 82023661582203844
128 128 1521 106824624842911903
256 4 47 4716963491730700
256 8 92 10419860132065421
256 16 200 18620991192223901
256 32 386 38021685162080859
256 64 626 78523677842439095
256 128 1519 151724614252907925
256 256 3049 305525121702510893
512 4 48 4716360621789893
512 8 97 9719688342246083
512 16 186 19120236412403536
512 32 337 29821796372496930
512 64 832 68722558232598123
512 128 1467 152323808222908695
512 256 3275 309322661392485460
512 512 6107 611723913522877923
1024 4 46 4616729671969538
1024 8 94 8919471282211363
1024 16 188 19319879362178795
1024 32 356 38521025222503797
1024 64 715 71521879602353833
1024 128 1605 157822501362738448
1024 256 3273 315922810452790788
1024 512 6552 610122451962660394
1024 1024 10736 1071518121891832163
上面的数据是我在pc上测试的,怎么看着都觉得不对呀,write才几十k到几M之间,而read在GB级别,太假了吧,我的参数错了吗? 怀疑有可能是cache有问题,再去查查吧
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