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: Thu Sep 3 11:24:23 2026 Auto Mode Machine = Linux oleg328-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-oleg328-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 1677 4593 633392 219883 64 8 2777 21468 901377 778512 64 16 2891 25295 874936 877797 64 32 5274 69945 735831 1143223 64 64 4398 91967 1304314 2006158 128 4 2867 1772 137772 279502 128 8 5430 25754 962469 636249 128 16 3133 11463 907174 1015251 128 32 3138 44897 2004703 1065630 128 64 10793 107014 1000121 1618028 128 128 11010 132370 1121270 1543594 256 4 4792 8957 147293 566377 256 8 12565 24883 764334 729045 256 16 13736 7653 1089202 910872 256 32 13210 13357 663292 437582 256 64 9686 14093 1504249 1347557 256 128 7755 129416 719277 1053922 256 256 4533 155799 249486 1897721 512 4 2824 6905 142976 67157 512 8 6534 8469 82982 731480 512 16 7622 22402 607353 986529 512 32 22607 13791 930933 55482 512 64 9549 60419 841884 1207940 512 128 15538 36649 286033 1351633 512 256 29344 80175 960496 1004057 512 512 17778 115706 1667552 2329648 1024 4 14120 11326 122472 392923 1024 8 9333 6913 436489 791289 1024 16 24518 36912 1217806 290892 1024 32 11780 30563 869284 506433 1024 64 46096 17637 993330 694775 1024 128 26191 27075 1577984 1053512 1024 256 36177 28360 376032 559254 1024 512 49566 47387 823926 1033237 2048 4 12514 13487 665586 134818 2048 8 7588 6649 416263 536843 2048 16 18281 36705 371090 1053487 2048 32 41056 36414 888509 757970 2048 64 26359 22871 1565847 357976 2048 128 21314 28732 1235996 979378 2048 256 47474 61957 1002933 576900 2048 512 17322 38975 703527 152699 4096 4 1063 7961 352192 192382 4096 8 7409 7882 133511 567783 4096 16 28325 17840 519142 272321 4096 32 18615 20833 910828 220546 4096 64 20599 52237 2114496 1559848 4096 128 19597 36133 1692463 394678 4096 256 27421 52307 641810 165763 4096 512 22169 55798 592086 490072 8192 4 7826 6055 362766 280412 8192 8 7865 19401 297998 175436 8192 16 10900 15785 729602 320750 8192 32 21856 21606 254102 253448 8192 64 31667 50383 459270 521449 8192 128 15416 24571 442046 390297 8192 256 16991 49412 1018011 783399 8192 512 38464 47279 766824 623195 16384 4 10092 8687 648640 528547 16384 8 11765 11930 532033 543486 16384 16 17711 19856 518740 419789 16384 32 29005 31273 604596 580804 16384 64 23260 33376 445594 640676 16384 128 30227 52238 690725 350941 16384 256 48883 51824 1001277 522300 16384 512 45101 77738 940643 591436 32768 4 7839 7222 228499 213001 32768 8 11270 21232 508368 359799 32768 16 22591 31899 553560 416408 32768 32