Iozone: Performance Test of File I/O Version $Revision: 3.483 $ 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: Mon Aug 24 04:47:22 2026 Auto Mode Machine = Linux oleg336-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg336-client.virtnet/iozone-file 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 kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 1987 7655 385790 496362 64 8 2302 9159 725882 688639 64 16 2924 24428 165823 863676 64 32 2718 33685 1330167 407457 64 64 2504 48560 1562436 1484662 128 4 4924 7449 699227 222232 128 8 4255 14293 836500 551878 128 16 6000 23773 414314 311445 128 32 4851 66462 1359835 514339 128 64 3955 13436 1114289 1332828 128 128 5754 46426 376274 272273 256 4 3402 10559 389064 468922 256 8 7881 20116 740100 761623 256 16 5374 30375 481972 1058076 256 32 6834 29367 1471270 1231629 256 64 5177 58116 1312954 792543 256 128 7711 64339 1523457 1598292 256 256 7903 52288 1523457 1842366 512 4 4372 6254 332489 502946 512 8 7031 13164 339748 458785 512 16 9923 31351 605299 1230786 512 32 13715 22809 703215 417245 512 64 10489 45980 898225 1261144 512 128 22248 53489 1594501 1434711 512 256 15593 69442 1764853 1484293 512 512 12183 52261 171185 1100818 1024 4 6098 9751 177098 150411 1024 8 6413 8329 147741 157153 1024 16 8415 14137 733579 452682 1024 32 14719 19794 1200447 632467 1024 64 18571 21309 1264041 273794 1024 128 37776 48974 1036478 1175477 1024 256 26302 45804 463779 1086012 1024 512 26404 81645 664464 1400926 2048 4 6918 9504 183789 267717 2048 8 8497 13056 910258 446954 2048 16 16170 24452 270721 886949 2048 32 19420 33247 326640 1094007 2048 64 24189 44809 1520394 286629 2048 128 23680 35378 1624172 1383731 2048 256 16236 40062 854056 528780 2048 512 41909 70933 774858 1518244 4096 4 6369 10590 436116 435420 4096 8 11273 10669 525268 413864 4096 16 25469 23811 1168952 1055676 4096 32 19303 29742 841952 783474 4096 64 27552 32988 523987 310797 4096 128 41466 42410 916953 646788 4096 256 51341 82085 1421726 530229 4096 512 46043 46793 1083643 1515941 8192 4 9794 9334 370980 307220 8192 8 11812 13178 669443 501867 8192 16 15242 20306 1062229 660970 8192 32 3152 23575 308921 446190 8192 64 28936 27895 974998 639193 8192 128 20743 29382 445606 777443 8192 256 38042 38280 303496 175740 8192 512 33293 41593 547776 752384 16384 4 5717 7533 321854 328120 16384 8 11277 13364 409069 335209 16384 16 19196 16106 524320 242865 16384 32 18870 25770 472842 415658 16384 64 21007 27601 627329 925554 16384 128 28288 35908 551167 465519 16384 256 35241 47571 608547 531930 16384 512 36609 55174 822487 1047971 32768 4 8568 7614 253424 296288 32768 8 10467 13697 253273 326934 32768 16 20568 30844 430654 346593 32768 32 26595 33450 1018588 689622 32768 64 33380 47248 726821 355656 32768 128 27485 36351 594850 401515 32768 256 35565 51702 638082 431777 32768 512 35781 33846 422093 878429 65536 4