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: Sun Nov 16 18:25:25 2025 Auto Mode Machine = Linux oleg326-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-oleg326-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 5261 20370 279676 273409 64 8 4586 28673 447537 32451 64 16 4285 32720 627470 673098 64 32 3058 49656 983980 789967 64 64 3497 45584 1279447 1255511 128 4 4366 18647 271173 218791 128 8 8301 32023 472262 103807 128 16 10162 53072 795593 652488 128 32 6054 45695 908709 601330 128 64 9593 94957 1123617 1185654 128 128 11409 100541 601330 1778862 256 4 4911 9470 265265 328682 256 8 11278 23526 223193 428843 256 16 12095 42432 719277 615393 256 32 10632 70290 1036624 742146 256 64 17739 89704 1185399 987979 256 128 15170 43418 1369908 1514860 256 256 10935 129885 1610276 2030503 512 4 9007 9819 167434 193942 512 8 17203 14704 447131 602412 512 16 14282 53383 649609 617659 512 32 12741 26891 665926 812577 512 64 16812 78795 1028091 1115688 512 128 15507 34533 1343179 1344020 512 256 31372 104593 1635797 363622 512 512 25715 123221 1700565 2007358 1024 4 7781 8986 172705 306853 1024 8 18990 27828 483242 258517 1024 16 8408 26505 300036 632095 1024 32 18289 39839 383520 806899 1024 64 21121 29108 950885 1105865 1024 128 13411 80075 1475525 1347311 1024 256 45706 114695 1462960 1084640 1024 512 37952 54045 1790460 1675884 2048 4 7712 8389 150521 74278 2048 8 7210 20113 155022 136270 2048 16 10033 19699 731693 246952 2048 32 33798 72991 1128946 836589 2048 64 22738 52231 1224892 1207671 2048 128 36990 57404 1581414 1324624 2048 256 24394 36699 553803 1464907 2048 512 57196 110249 1687011 1642495 4096 4 6814 6098 238848 161833 4096 8 16582 16281 383557 291096 4096 16 16812 33107 708658 328237 4096 32 25613 52140 909622 717328 4096 64 31199 68744 692714 295273 4096 128 37610 89225 1460152 984135 4096 256 40663 52170 1698823 1415868 4096 512 44125 30266 729078 568421 8192 4 7400 6377 232912 174034 8192 8 20379 13386 286685 227619 8192 16 18667 27820 340979 366090 8192 32 32958 24008 866056 775233 8192 64 27311 33528 595305 808848 8192 128 40327 57789 409235 422832 8192 256 51251 57299 1674548 1185521 8192 512 49488 78794 1420539 442069 16384 4 9001 10167 172954 137839 16384 8 11589 12842 408446 146822 16384 16 18043 20169 217219 309207 16384 32 28440 36094 429800 383807 16384 64 38435 40078 675237 387447 16384 128 49257 46724 1147834 1124101 16384 256 47549 67696 1121880 1391876 16384 512 51188 60554 1517327 1495273 32768 4 10425 9675 119597 152714 32768 8 16405 17816 334415 341387 32768 16 22837 24722 567639 372096 32768 32 26563 36536 917588 649053 32768 64 30749 35505 290800 292437 32768 128 33761 48456 983197 978590 32768 256 39547 57803 1672173 351124 32768 512 35832 44115 862043 1255290 65536 4 10207 11640 183384 216670 65536 8