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 Aug 3 16:04:12 2026 Auto Mode Machine = Linux oleg645-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-oleg645-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 4410 13050 344233 247222 64 8 3352 20646 492717 88862 64 16 4195 22323 213925 529661 64 32 7451 57767 2133730 799377 64 64 8406 40078 1679761 1679761 128 4 5365 8150 505620 238417 128 8 5621 18870 659704 735635 128 16 8724 31519 1162547 962469 128 32 8494 35467 1487977 492178 128 64 14450 52307 553586 673778 128 128 8333 97865 1663139 1939522 256 4 7486 13408 470566 588736 256 8 9576 23065 931416 513063 256 16 11287 37830 1495866 1008392 256 32 17365 44834 828628 212462 256 64 20799 60520 572721 1219045 256 128 20593 58932 1639786 1306564 256 256 16523 96927 1755037 2015259 512 4 11973 10321 134454 469723 512 8 16246 15370 330493 801357 512 16 18562 15599 901241 547017 512 32 33540 64354 1303238 677267 512 64 25219 83576 1442420 636894 512 128 18733 72624 1204552 400888 512 256 32193 57173 388136 1541840 512 512 19869 87792 1803387 1635797 1024 4 9462 15222 523278 586439 1024 8 17274 13712 1446698 761950 1024 16 25268 38192 1040748 851364 1024 32 28866 63736 1203137 343163 1024 64 26372 57232 531963 1189146 1024 128 34556 99060 1612342 1336827 1024 256 37498 113014 1175799 1267024 1024 512 29845 106944 1236742 1709231 2048 4 11447 14864 275602 279249 2048 8 22329 23069 865588 932593 2048 16 24370 34839 1485169 628387 2048 32 44106 68289 1440344 1203273 2048 64 43583 65605 2085540 1457698 2048 128 55558 71816 813995 1404546 2048 256 51680 116324 803788 1523901 2048 512 63588 61739 1708146 1497076 4096 4 12401 12423 537109 401175 4096 8 17341 26118 840222 926098 4096 16 36637 38294 713100 426884 4096 32