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: Thu Sep 10 14:49:05 2026 Auto Mode Machine = Linux oleg617-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-oleg617-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 1843 4315 537079 516414 64 8 3751 13130 811459 673098 64 16 2704 27997 1049372 336889 64 32 4461 60720 1304314 1124074 64 64 5440 41826 1124074 248136 128 4 3964 4841 766076 568836 128 8 4655 18667 780556 667081 128 16 7134 29775 1294270 948860 128 32 8436 37392 1377278 1424795 128 64 4139 43143 1114289 1220700 128 128 3686 51692 1521718 1755594 256 4 7166 6197 396975 477472 256 8 4673 10344 489442 748353 256 16 7700 15164 1023775 785584 256 32 9657 26987 1089202 456366 256 64 10284 22996 1304976 782721 256 128 6856 28683 636930 1579483 256 256 7189 21801 1686137 2065659 512 4 7334 5623 301536 257931 512 8 6083 13463 595397 701378 512 16 10692 13494 790153 1038532 512 32 9536 12103 274235 1053821 512 64 12846 21934 725058 690996 512 128 11673 48812 185900 567096 512 256 17252 69040 1604029 1510391 512 512 25266 40544 260181 1635797 1024 4 4608 4387 196163 213777 1024 8 5900 10100 484605 440427 1024 16 10854 11853 197145 901394 1024 32 24927 42449 812086 701355 1024 64 16246 37600 618354 358397 1024 128 26436 44827 843505 366252 1024 256 17838 48129 1646334 1214706 1024 512 19622 34474 870871 1287921 2048 4 7685 5422 150213 109192 2048 8 7214 14504 278335 335730 2048 16 11556 15390 873421 895082 2048 32 16260 35374 1090535 444618 2048 64 15039 41388 1331400 243549 2048 128 32393 37886 401646 1171598 2048 256 19032 56979 1095821 428002 2048 512 41260 39555 468759 703758 4096 4 6192 5892 463659 226462 4096 8 8142 13098 333577 364801 4096 16 12168 15930 648913 241253 4096 32 23175 27091 574792 424941 4096 64 36308 44839 267450 230318 4096 128 31590 31733 457449 633387 4096 256 19299 20687 1777937 401334 4096 512 20218 30518 1772435 746632 8192 4 5485 1935 219790 195882 8192 8 7394 10852 378770 505522 8192 16 17184 14760 490483 520650 8192 32 17144 41782 404580 614732 8192 64 19989 34755 385195 220879 8192 128 19405 29284 833270 923554 8192 256 39277 56438 683180 417616 8192 512 28732 35530 843581 938590 16384 4 5326 4476 167055 307387 16384 8 7889 7655 453274 170165 16384 16 11748 13744 581674 483232 16384 32 15178 22941 419779 696953 16384 64 20636 35476 510247 743549 16384 128 29217 39094 500838 876391 16384 256 34842 37727 821258 910266 16384 512 32276 53600 891363 694207 32768 4 7098 6342 210161 270367 32768 8 9786 10640 349835 390988 32768 16 16540 19490 698603 619399 32768 32 18017 25181 569846 628267 32768 64