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 Sep 8 22:00:09 2026 Auto Mode Machine = Linux oleg415-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-oleg415-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 1271 12789 488236 496362 64 8 2493 15647 546928 653436 64 16 2379 10827 645579 821391 64 32 3881 21519 376589 1066042 64 64 3086 57867 1210227 1679761 128 4 2735 4325 154016 419822 128 8 2800 8534 853794 695603 128 16 4416 11407 805138 292922 128 32 3639 25868 495814 320748 128 64 4228 38657 927549 680612 128 128 5568 33142 1467639 992724 256 4 5356 5833 477472 282578 256 8 6422 6292 203985 176202 256 16 5297 14429 1027695 1003679 256 32 8351 19783 1213534 102194 256 64 14268 81271 1142514 621448 256 128 12871 26683 502028 1153561 256 256 9787 57260 1280084 727563 512 4 6894 7691 475022 288919 512 8 12629 16279 599553 658170 512 16 11278 23980 636705 570865 512 32 10669 25306 1036527 494150 512 64 14514 18253 631277 1032044 512 128 27095 50818 1402845 939486 512 256 12049 45911 676414 354323 512 512 19867 68874 632206 1233614 1024 4 7238 11503 537219 491819 1024 8 12438 16450 667044 428263 1024 16 17500 35253 898189 645684 1024 32 23786 30423 507691 561962 1024 64 16898 54488 152835 393679 1024 128 19800 57918 938625 392169 1024 256 14128 60245 1167489 236718 1024 512 22574 58932 1284839 974400 2048 4 11393 16628 598484 283264 2048 8 17190 26017 200447 351703 2048 16 19629 25961 1300361 855502 2048 32 19688 45992 778157 154729 2048 64 31788 76503 653684 1040094 2048 128 37689 32587 1301938 1122162 2048 256 29962 48631 936048 570615 2048 512 37245 68346 1176251 546857 4096 4 7571 9099 262834 303881 4096 8 11214 11469 453548 336064 4096 16 22275 21868 767753 444397 4096 32 18201 35449 656401 279571 4096 64 24881 39404 892145 789668 4096 128 48033 53339 378279 674572 4096 256 29144 34328 682911 779315 4096 512 30403 43476 976195 283895 8192 4 9590 11466 345199 481823 8192 8 18323 15017 644227 345331 8192 16 21780 25062 584639 496185 8192 32 36543 43817 716397 611711 8192 64 41583 64076 433715 501867 8192 128 42476 3450 767612 694293 8192 256 36726 55448 1093012 621695 8192 512 58353 62008 1057977 584102 16384 4 10697 13353 567864 375108 16384 8 18111 21966 592058 546860 16384 16 32405 39207 934084 433001 16384 32 40378 44932 931640 989669 16384 64 50618 53125 1120728 882718 16384 128 43229 57533 630177 591416 16384 256 54576 65314 789554 1345598 16384 512 42722 69033 1040387 688863 32768 4 10682 13534 556746 423611 32768 8 15481 25981 940365 496551 32768 16 29035 36542 866467 962263 32768 32 36454 42982 729785 699019 32768 64 45643 56879 1075912 895368 32768 128 56118 66185 926302 1284106 32768 256 64824 85099 932201 1274969 32768 512 67949 102449 1274674 857531 65536 4 13408 14059 539110 427738 65536 8 22581 24886 628407 475943 65536 16 33842 37417 647742 614248 65536 32 42415 54080 1382673 885549 65536 64 58305 60496 1214528 935666 65536 128