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: Fri Oct 24 01:27:20 2025 Auto Mode Machine = Linux oleg426-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-oleg426-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 14315 19352 301678 217039 64 8 15849 34411 444572 378715 64 16 20786 48091 633392 511494 64 32 25868 62560 769584 592827 64 64 25507 75364 1105556 1310683 128 4 14638 20437 239695 242949 128 8 22811 42922 435487 695603 128 16 29130 54055 627328 419822 128 32 43213 84098 819893 643108 128 64 35935 96251 1085013 814915 128 128 48155 152745 1471662 1508887 256 4 14177 20312 322366 277108 256 8 25879 36596 352647 381462 256 16 38415 69584 1079348 663292 256 32 40036 87610 870974 785010 256 64 54571 112920 984356 937106 256 128 32846 154588 1384034 1098113 256 256 61158 143341 2015259 1740810 512 4 19013 19952 254597 231664 512 8 30422 35066 430201 345209 512 16 43474 60263 564561 476286 512 32 52090 88030 853257 891884 512 64 62082 105285 1142396 678337 512 128 67607 149402 1970519 1312798 512 256 86456 153976 1895721 1701913 512 512 72501 170939 1354190 2099600 1024 4 17427 19462 260762 258331 1024 8 30056 34677 447727 432445 1024 16 35851 58006 726752 636498 1024 32 66111 90196 542101 910181 1024 64 88388 119487 1396825 1291406 1024 128 87363 137766 1812371 1316341 1024 256 84210 141692 1452570 1148139 1024 512 82861 150987 766027 1648862 2048 4 19185 20381 292445 268244 2048 8 31826 37392 488208 400616 2048 16 44880 59415 676383 678359 2048 32 57583 82321 945527 991244 2048 64 77923 119076 1222626 1017908 2048 128 71713 122224 1533970 1213986 2048 256 91748 154857 1300164 1373553 2048 512 87189 163111 1812296 1596403 4096 4 17962 19930 297091 253604 4096 8 29256 30951 386014 433443 4096 16 49206 58416 692351 648203 4096 32 63667 83944 962845 992952 4096 64 79318 101098 1198723 1096087 4096 128 83316 125984 1494836 1120026 4096 256 90987 148313 1598751 1267718 4096 512 107487 168207 1614527 1606375 8192 4 19611 20411 294655 326090 8192 8 34905 37709 511969 483587 8192 16 55198 68367 877177 802594 8192 32 86321 106797 1310699 988547 8192 64 101189 145116 1783271 1233352 8192 128 98013 165873 1511128 1407793 8192 256 116929 164162 2066526 1656944 8192 512 105781 159753 1656625 1380751 16384 4 20334 21232 325867 268269 16384 8 31961 35935 461378 436035 16384 16 50217 62297 826801 745267 16384 32 73035 95792 996832 871170 16384 64 87520 122908 1370584 1096497 16384 128 101545 144604 1375302 1312597 16384 256 98286 146481 1761730 1302817 16384 512 107500 154938 1777405 1478575 32768 4 18595 21005 297431 283649 32768 8 32890 38379 533760 478356 32768 16 52186 58222 752250 721506 32768 32 72696 91167 1054587 868647 32768 64 85990 119795 1263657 1301446 32768 128 103116 133887 1472852 1378776 32768 256