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: Sat Jul 18 15:59:47 2026 Auto Mode Machine = Linux oleg101-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-oleg101-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 1738 6061 639427 528618 64 8 4055 5745 743988 450541 64 16 2832 16886 1033216 453587 64 32 5251 57238 1310683 1421755 64 64 7544 11161 1484662 1484662 128 4 5777 11851 650117 556454 128 8 8688 16530 887675 744820 128 16 8789 28299 831319 962469 128 32 7856 64778 789741 230633 128 64 9911 42147 719853 1359835 128 128 9909 60981 1024942 1802755 256 4 3732 4576 651223 591330 256 8 6632 20836 873809 648079 256 16 8474 20437 1080434 812944 256 32 12189 42167 1066483 1447470 256 64 12118 52609 1561112 1306564 256 128 19091 52192 690151 1384034 256 256 10051 70954 1683493 2065659 512 4 7928 10357 442889 369949 512 8 12624 17214 426697 263662 512 16 16540 15940 1101383 1040545 512 32 18714 36605 1442420 881269 512 64 17020 34667 1040545 1351633 512 128 13402 18528 1399189 369949 512 256 20377 59807 1783912 1417662 512 512 27390 76499 1854787 1571169 1024 4 5876 9957 359176 238188 1024 8 14618 20720 695563 461685 1024 16 20773 32819 566334 697596 1024 32 25623 37180 1395010 592915 1024 64 21583 52553 892033 1216082 1024 128 20568 52599 114542 1090423 1024 256 35617 83320 1709231 1311117 1024 512 34125 90149 874595 1706515 2048 4 6724 4613 327362 414736 2048 8 15180 11398 208297 382304 2048 16 12099 13409 351833 610435 2048 32 29219 49709 770825 729828 2048 64 18353 44346 1300361 1257160 2048 128 21293 62718 934317 1402711 2048 256 49374 84186 1732608 761869 2048 512 43044 132702 1754908 1024586 4096 4 5119 6365 371418 440907 4096 8 12231 10204 475886 526750 4096 16 18814 19610 446139 386118 4096 32 35548 30572 523651 405101 4096 64 32117 49756 1107035 679158 4096 128 36138 70828 986282 824140 4096 256 50589 49560 510078 910201 4096 512 28532 45529 1348307 1547484 8192 4 6553 7390 259789 263475 8192 8 13511 17282 796344 477531 8192 16 15272 22500 376092 488197 8192 32 25269 46152 1140163 1152980 8192 64 29308 35461 767407 964435 8192 128 28648 56170 859233 680285 8192 256 31145 48963 890614 638493 8192 512 49175 75380 1283429 516712 16384 4 3732 7255 303924 271455 16384 8 12416 14301 564265 558287 16384 16 17517 22137 857569 601842 16384 32 27576 29447 1512551 862174 16384 64 30218 35820 483460 443266 16384 128 39852 34292 805783 607149 16384 256 48683 58321 1231801 596477 16384 512 41676 53092 1371049 1118357 32768 4 7194 7846 391932 386848 32768 8 13184 11626 261764 362710 32768 16 16898 22730 722143 380792 32768 32 27985 31041 762542 505171 32768 64 33246 38656 819060 814719 32768 128 29623 40845 715441 772355 32768 256 30172 45332 1295838 993064 32768 512 41115 60802 590254 805069 65536 4