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 Aug 27 11:10:39 2026 Auto Mode Machine = Linux oleg657-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-oleg657-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 3378 10998 653436 598110 64 8 3884 26946 225423 688639 64 16 5149 21176 955947 477808 64 32 3930 21961 1232453 1119387 64 64 4944 56491 720041 1452528 128 4 2668 11308 584313 547377 128 8 3348 18513 969421 766076 128 16 9430 13469 137489 618653 128 32 3829 51484 1377278 1048974 128 64 5941 84270 656477 971174 128 128 7081 91822 1579934 2035099 256 4 5446 3960 705107 89666 256 8 6708 16746 580775 783292 256 16 10023 22664 1153561 812944 256 32 8959 28162 1361224 289902 256 64 13872 30203 1525622 517265 256 128 20434 73354 1662639 1581810 256 256 8614 27624 649647 386126 512 4 8733 9528 535558 636705 512 8 11060 20638 1053304 817837 512 16 16075 24467 1165966 614654 512 32 7073 25006 885631 1087440 512 64 21006 59457 1122687 1248678 512 128 21757 51123 906185 1245780 512 256 14673 63554 792486 1754758 512 512 32456 73541 1848401 1122687 1024 4 7097 8032 618354 242765 1024 8 12333 18968 295434 785788 1024 16 11374 31571 860575 833196 1024 32 26791 36830 566408 702847 1024 64 25940 49409 1526390 1220575 1024 128 32252 49304 624376 1003073 1024 256 40459 79936 483950 1559081 1024 512 29354 93320 1622698 1025099 2048 4 5710 9678 273583 367675 2048 8 9382 16684 559429 821468 2048 16 17371 20073 414836 491027 2048 32 27383 38164 546996 1201086 2048 64 19242 40408 1455475 808251 2048 128 35190 76395 574623 614277 2048 256 22567 64532 1765367 1485169 2048 512 39485 79750 696850 1652925 4096 4 7248 11397 360438 354972 4096 8 10307 10041 579758 260958 4096 16 17479 21714 464725 449901 4096 32 25181 56300 797364 455919 4096 64 25590 54575 594072 416009 4096 128 36193 67090 685965 750448 4096 256 56468 52199 632407 811757 4096 512 31392 55423 628314 391244 8192 4 8336 9634 444614 271526 8192 8 13734 15349 433114 529713 8192 16 18208 29803 482080 506707 8192 32 31504 33227 980367 683520 8192 64 30493 32618 658462 543995 8192 128 31744 48344 773766 794264 8192 256 37270 49517 1161319 1179538 8192 512 52230 63595 1211650 494770 16384 4 3631 8603 314423 547226 16384 8 14583 13558 579349 622708 16384 16 29885 19858 355455 268058 16384 32 20069 35439 1319376 875030 16384 64 25368 34459 597561 318990 16384 128 38956 30753 1022203 309827 16384 256 40447 42920 767508 621570 16384 512 38754 44007 850006 791263 32768 4 5520 7761 426645 331680 32768 8 10396 10711 756136 527672 32768 16 27396 29103 405816 238206 32768 32 29856 30033 739735 492752 32768 64 31971 37709 576585 505071 32768 128 33020 41589 1384303 628112 32768 256 30923 56873 1094487 346935 32768 512 37041 51979 583652 427701 65536 4