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 16 14:34:40 2026 Auto Mode Machine = Linux oleg428-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-oleg428-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 1593 7321 188269 407457 64 8 5386 9107 571375 474430 64 16 1247 4239 1013707 901377 64 32 7520 56586 969761 1017549 64 64 1356 71835 269025 1599680 128 4 3051 2494 542400 612303 128 8 6944 23151 748976 146934 128 16 5879 20983 633247 702889 128 32 3874 25039 1145188 864797 128 64 4525 28057 1183041 1240443 128 128 7129 35409 1266785 1732927 256 4 2798 13964 585845 40809 256 8 15233 12638 430218 725106 256 16 6678 21236 140123 741633 256 32 15608 13134 663292 901693 256 64 12553 44622 605332 1044693 256 128 15710 53870 785010 566377 256 256 16638 58958 284751 331217 512 4 7771 6207 301198 310832 512 8 10222 6675 243594 378691 512 16 14462 20774 837942 753025 512 32 18217 16056 855978 338623 512 64 31249 30121 1103647 291904 512 128 22547 32732 1218910 1282994 512 256 19517 57683 527273 1351633 512 512 43040 80961 1251589 340880 1024 4 2220 3155 279551 63940 1024 8 4759 20696 350443 286125 1024 16 16226 17846 585799 707245 1024 32 14120 13861 1117955 516917 1024 64 12739 38936 1175477 116231 1024 128 11403 25052 1196101 164050 1024 256 31646 24195 958953 131772 1024 512 16419 44114 401106 960454 2048 4 6280 7872 369272 217572 2048 8 20647 7042 788009 562617 2048 16 11224 33523 105648 292236 2048 32 8037 45164 930471 374210 2048 64 16905 51544 1306095 713876 2048 128 34496 60899 960541 1088738 2048 256 37397 25320 514558 880946 2048 512 37010 60870 642199 1343897 4096 4 4690 5047 176224 184638 4096 8 7566 8560 783760 445561 4096 16 15924 16176 527154 480182 4096 32 34833 23929 460329 745272 4096 64 17762 24447 692937 467800 4096 128 19989 44941 285993 484734 4096 256 22198 41449 647080 654326 4096 512 21399 44161 456028 277731 8192 4 3291 3702 189445 154464 8192 8 9568 10688 459632 315369 8192 16 13271 16524 533372 509986 8192 32 15251 24130 683520 597822 8192 64 28005 31489 680919 519863 8192 128 25864 27053 645401 421877 8192 256 28904 34619 844451 663971 8192 512 33774 57842 705049 595780 16384 4 6065 8328 334975 374285 16384 8 9646 10914 361096 421659 16384 16 13206 15837 421574 300178 16384 32 23535 22137 523637 552745 16384 64 20648 37847 714118 388079 16384 128 32620 46201 326870 330716 16384 256 37529 48693 650181 625986 16384 512 28787 35700 712689 420542 32768 4