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: Sun Sep 6 00:02:12 2026 Auto Mode Machine = Linux oleg438-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-oleg438-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 2414 3528 378715 454354 64 8 2365 16846 639427 363829 64 16 3444 14077 438043 842003 64 32 2781 50755 1066042 998622 64 64 2949 12286 1232453 1363961 128 4 2330 6193 342216 504196 128 8 3806 12847 662962 53468 128 16 3574 5946 947186 556454 128 32 7036 27784 381082 612303 128 64 4695 27296 176555 1217930 128 128 2294 51927 1409828 1622919 256 4 3948 6531 556398 386126 256 8 3251 6370 658411 588414 256 16 7528 25535 525621 442086 256 32 11798 21267 641497 931416 256 64 5101 22189 917880 1147398 256 128 13811 44849 985259 1334162 256 256 6363 28719 1619994 1532153 512 4 4324 3386 137528 246050 512 8 5316 11969 857345 750656 512 16 10103 16817 504482 848872 512 32 6906 16434 302769 378958 512 64 13677 33567 1057974 707152 512 128 7968 22257 77212 828566 512 256 21602 31111 750656 181362 512 512 7083 42327 798675 1163439 1024 4 4338 4435 63069 178801 1024 8 10401 9854 284287 267153 1024 16 21964 29435 632467 838728 1024 32 14275 21949 1241031 930894 1024 64 13604 35790 1153071 286678 1024 128 25872 47166 1448650 1193442 1024 256 35690 58043 758452 780504 1024 512 19930 70054 1556257 869989 2048 4 5283 5401 122657 153823 2048 8 5705 5175 787070 378831 2048 16 7012 14551 515732 795010 2048 32 9824 16249 550220 564985 2048 64 22725 41810 739376 501578 2048 128 27003 12808 765604 538391 2048 256 21645 52668 1646273 669738 2048 512 21635 55885 787936 635077 4096 4 5750 4590 283300 202621 4096 8 9397 14002 291012 491473 4096 16 12007 7837 196498 111964 4096 32 13746 41656 330854 522314 4096 64 9514 18574 402199 449666 4096 128 20685 51827 316955 395705 4096 256 27854 24323 482515 336287 4096 512 28786 62047 789523 272775 8192 4 3775 3510 114555 108717 8192 8 8160 11198 237876 227020 8192 16 13826 20726 270398 328402 8192 32 24269 21738 576691 561820 8192 64 17060 28661 973176 555571 8192 128 27711 33998 738350 285027 8192 256 25315 33764 1118196 499786 8192 512 34178 37651 777971 310762 16384 4 4703 5167 380403 201060 16384 8 7655 6997 354187 441639 16384 16 11452 14474 560559 421864 16384 32 16202 17308 595155 633886 16384 64 19796 18608 652075 596975 16384 128 19386 32219 1022340 421931 16384 256 21222 35055 376460 523163 16384 512 25826 38287 633763 334530 32768 4 7010 8580 484411 498213 32768 8 17843 10865 242074 294305 32768 16