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: Tue Dec 2 22:52:28 2025 Auto Mode Machine = Linux oleg405-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-oleg405-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 2450 9824 249985 265565 64 8 3269 30650 424198 373966 64 16 3104 37824 552557 395452 64 32 3423 63179 769584 407457 64 64 2234 74860 1013707 1204796 128 4 7188 18356 278777 237049 128 8 8177 8045 187664 363781 128 16 3298 12308 493989 404939 128 32 11154 73264 940549 93096 128 64 3788 28610 1102844 841746 128 128 11137 112062 1220700 1521718 256 4 11508 5694 219902 231469 256 8 10990 22763 348752 391333 256 16 12020 19601 609801 522297 256 32 17545 76190 807442 716876 256 64 14301 85990 883152 894929 256 128 17521 84601 1230218 1325925 256 256 24765 132090 1325925 1996523 512 4 12638 15565 239920 237165 512 8 5366 6919 370204 73143 512 16 25099 17404 376434 504956 512 32 21871 70184 326523 645703 512 64 43854 108246 942786 648041 512 128 26117 120782 142729 1127995 512 256 45102 121068 668413 1546280 512 512 35536 110247 1655979 1657257 1024 4 5897 13479 213014 231524 1024 8 8051 14363 134753 298805 1024 16 15710 45179 590876 588125 1024 32 42496 19062 749714 688207 1024 64 18750 82024 832550 796277 1024 128 34046 56257 1199106 1009676 1024 256 41929 113351 1259223 1131503 1024 512 14491 71578 356286 321099 2048 4 8182 8413 176200 220782 2048 8 13886 24349 436484 266463 2048 16 30621 34707 723679 599152 2048 32 32260 74224 850841 732504 2048 64 35702 51086 298844 484054 2048 128 37368 76672 1068957 1092338 2048 256 41778 80342 137274 1211077 2048 512 35036 84453 1365257 986577 4096 4 9134 11776 106911 92766 4096 8 16834 14735 286857 266648 4096 16 24167 31464 287616 223202 4096 32 22210 26470 542434 494330 4096 64 34583 59580 807407 762032 4096 128 32798 60239 700310 949908 4096 256 31152 51306 820832 392146 4096 512 1458 45248 1750403 1457674 8192 4 6826 7527 90053 114456 8192 8 12674 15251 193253 297967 8192 16 16743 19498 199347 133998 8192 32 23734 31137 340823 400861 8192 64 24992 47936 593967 615426 8192 128 28241 53473 1232998 939668 8192 256 33163 49708 363023 267826 8192 512 29971 41163 521781 233682 16384 4 8080 7987 154825 130241 16384 8 14527 16085 252834 280303 16384 16 23976 22260 518415 383522 16384 32 26178 34640 403995 428969 16384 64 36129 44529 940682 354939 16384 128 35463 42959 1042834 618170 16384 256 43520 60540 590283 849880 16384 512 41897 57755 1279506 883422 32768 4 8422 9206 125534 109470 32768 8 14873 18650 227791 407805 32768 16 18794 27497 688348 253994 32768 32 28036 33966 546134 541288 32768 64 33972 62692 476127 330588 32768 128 49544 55032 1249742 947052 32768 256 48355 61773 712503 1072319 32768 512 45471 75208 540841 612533 65536 4