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: Wed Sep 2 19:17:47 2026 Auto Mode Machine = Linux oleg104-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-oleg104-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 4728 11365 710511 254006 64 8 3373 9114 704914 212570 64 16 1686 29754 1828508 799377 64 32 1981 16841 1421755 1183548 64 64 2351 65587 1599680 1452528 128 4 5600 11052 620799 387966 128 8 3363 20578 821147 426831 128 16 7506 31348 271173 819893 128 32 7059 57654 1231904 1093856 128 64 7556 88507 273522 1440082 128 128 7391 62617 1391557 1827299 256 4 6057 11181 559005 535583 256 8 5919 12616 68049 680960 256 16 11145 26508 1089202 114644 256 32 13001 31384 941213 1128110 256 64 25958 58662 1347557 976301 256 128 8232 63337 1153561 1319408 256 256 19604 90873 1662639 2034350 512 4 10895 9086 344545 165588 512 8 15811 20285 630536 666753 512 16 17272 33554 1017858 859060 512 32 17760 69274 1766304 1053821 512 64 15407 102442 1103647 1679288 512 128 27322 141005 984268 1459080 512 256 37328 98328 2265742 2265742 512 512 26395 82012 1565443 402844 1024 4 7104 7750 368609 332690 1024 8 13073 15128 521879 699414 1024 16 20661 28434 902151 441015 1024 32 20626 41209 953418 684914 1024 64 16685 47269 1201790 1028289 1024 128 20608 62431 1109293 295353 1024 256 17702 48027 880512 989440 1024 512 32136 88123 1583219 818431 2048 4 7525 8240 610609 212360 2048 8 14844 8290 229543 301445 2048 16 12099 24798 658949 822097 2048 32 33700 33760 762749 581469 2048 64 21670 37617 658949 580330 2048 128 33454 42699 643643 607715 2048 256 32710 43929 1535066 745278 2048 512 39660 59972 675904 1394966 4096 4 6547 6719 174596 285432 4096 8 14299 15646 456938 760615 4096 16 24854 19888 242110 299677 4096 32 13589 23181 857244 544100 4096 64 25432 32043 588758 373753 4096 128 26575 32368 1029918 655775 4096 256 22384 45120 503191 584472 4096 512 40579 53565 947237 1091353 8192 4 5690 6839 291157 218693 8192 8 11202 10339 104136 215436 8192 16 16297 20586 553851 621414 8192 32 32663 34670 809325 370779 8192 64 26943 24703 844700 788287 8192 128 28054 54147 819439 873542 8192 256 31037 64964 582597 484849 8192 512 31066 44824 1032760 637403 16384 4 5654 7734 423368 230048 16384 8 12209 16611 363741 335813 16384 16 16707 21173 417055 414050 16384 32 28194 35795 683260 815944 16384 64 36929 34023 644431 417405 16384 128 35098 38396 751247 736528 16384 256 34768 64054 1198627 752803 16384 512 31625 53814 408670 643646 32768 4 7914 8198 318590 325124 32768 8 11827 11581 545341 379311 32768 16 18308 18116 787084 365939 32768 32 23996 28286 448287 653777 32768 64 25229 35655 986421 525887 32768 128 36711 45789 919651 713884 32768 256 38785 54655 589184 600456 32768 512 30180 48994 1257161 577004 65536 4