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 Mar 16 14:31:19 2026 Auto Mode Machine = Linux oleg323-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-oleg323-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 4259 10787 118524 144180 64 8 8258 15751 182261 404998 64 16 9140 31999 121419 271200 64 32 18312 49537 614542 576282 64 64 7393 50157 686877 1336792 128 4 6883 16928 136441 137489 128 8 7799 24681 230633 130599 128 16 21906 39715 425141 444501 128 32 15964 58875 520321 556454 128 64 16475 98475 283787 762811 128 128 8493 96894 699227 467329 256 4 6324 6938 91461 131831 256 8 8586 32177 370536 133619 256 16 31900 70447 140508 267779 256 32 17892 22877 386126 315638 256 64 28138 73328 930608 1361224 256 128 40233 112224 1312954 1208072 256 256 26727 146031 984356 2371308 512 4 7297 8833 63976 77740 512 8 13935 17091 155200 239813 512 16 22269 47332 89074 357032 512 32 44677 86516 657969 117375 512 64 17309 68021 963945 853257 512 128 33341 32875 1292259 1147892 512 256 29624 178454 1505098 1180062 512 512 45787 159607 1523247 1734911 1024 4 9206 11270 72254 80389 1024 8 15060 18420 274758 100322 1024 16 16584 29071 66001 108486 1024 32 34592 56986 676286 361200 1024 64 35222 76698 570471 698504 1024 128 32306 86802 1326096 583808 1024 256 16329 90659 1854631 1408275 1024 512 50291 128400 1264041 1420384 2048 4 11645 13543 158896 113620 2048 8 10257 23356 273941 169017 2048 16 22566 43689 160464 94122 2048 32 34550 24509 754376 294208 2048 64 36289 42859 746379 1151804 2048 128 51580 53944 704970 999433 2048 256 31149 65536 710334 1130729 2048 512 51939 65769 1500476 488180 4096 4 11388 10315 83121 96134 4096 8 14252 18971 260345 191025 4096 16 27989 29045 472860 420016 4096 32 32299 59489 360498 464135 4096 64 42334 59097 613373 479164 4096 128 59624 89526 704242 1179384 4096 256 52818 102137 1709472 1453973 4096 512 74956 87543 725599 1503076 8192 4 11528 8833 87912 57681 8192 8 13362 22194 164918 180432 8192 16 25967 32646 296532 251311 8192 32 38861 41601 622777 377601 8192 64 33712 43284 888220 825879 8192 128 48019 60108 660106 581443 8192 256 40901 79371 1118524 501713 8192 512 45205 72649 1213104 1309051 16384 4 11300 12008 99927 92420 16384 8 16247 19311 131663 172579 16384 16 23771 36900 262926 349257 16384 32 39002 58037 831423 445314 16384 64 48279 65344 469213 731620 16384 128 55277 77311 1156002 768048 16384 256 64581 96487 1503254 1398675 16384 512 66532 106771 1034467 871955 32768 4 11739 11681 125607 96564 32768 8 17417 19516 159035 138633 32768 16 28496 31205 434352 322180 32768 32 40880 48890 253351 300329 32768 64 48979 57790 445520 383372 32768 128 56743 72135 1487019 705054 32768 256 62725 91222 1508862 1216652 32768 512 70858 100712 1193390 1371156 65536 4 11863 13694 108317 103227 65536 8 21272 24744 266752 240606 65536 16 40556 30878 288331 228994 65536 32 42816 50917 436423 559553 65536 64