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 Jun 11 19:40:07 2026 Auto Mode Machine = Linux oleg345-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-oleg345-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 1032 2751 404998 592827 64 8 2382 17515 771797 456673 64 16 4532 13411 1083249 969761 64 32 1584 41318 679917 1101022 64 64 1981 22630 633392 1452528 128 4 2530 5276 515822 546819 128 8 2096 4184 606082 589446 128 16 4640 9295 927549 356533 128 32 4336 18051 490380 853794 128 64 3635 35547 1196221 1217930 128 128 3200 57785 1504659 1363288 256 4 2020 3636 242664 544547 256 8 3717 8198 999940 688381 256 16 11332 31613 1040643 966633 256 32 8531 32754 538809 1153561 256 64 5670 81394 1384034 1175022 256 128 5026 48074 1334162 1561112 256 256 5809 15849 808050 1868008 512 4 3373 2645 94188 93106 512 8 7775 4647 238933 512549 512 16 5105 18484 932550 335974 512 32 8767 11841 191674 513039 512 64 8039 23290 1233614 282422 512 128 12386 38143 937845 577776 512 256 17460 28609 692780 1388334 512 512 27001 64127 1614885 1373241 1024 4 3640 2970 420012 162979 1024 8 6433 6864 852039 774034 1024 16 7086 16947 353588 633307 1024 32 13652 22644 198796 1186518 1024 64 14877 50894 793189 1210257 1024 128 31740 46404 529993 1316341 1024 256 11699 29672 856115 485976 1024 512 15148 36570 916004 256388 2048 4 3587 6037 301530 302294 2048 8 6738 9883 260357 345827 2048 16 7123 11708 661282 543811 2048 32 11852 12103 364292 579351 2048 64 16602 16137 1399968 1122749 2048 128 22260 22042 405610 700144 2048 256 27600 44576 472109 644029 2048 512 22346 42976 1449336 525963 4096 4 3865 3765 116482 134843 4096 8 8539 5853 315923 380070 4096 16 11005 12765 548618 236680 4096 32 14867 15882 1229257 815262 4096 64 18504 35272 762912 544825 4096 128 20420 31290 866497 966474 4096 256 19457 36119 1681530 388326 4096 512 22108 45263 1268935 458217 8192 4 6453 4700 256544 216735 8192 8 7338 7623 337884 229880 8192 16 13681 11284 304570 453672 8192 32 15600 17924 456536 393502 8192 64 16848 25026 651655 315187 8192 128 16998 25452 647127 484391 8192 256 30751 37935 623681 359457 8192 512 22840 29168 1025271 651347 16384 4 5162 4894 140593 268001 16384 8 7422 8625 541568 388219 16384 16 11848 14000 391332 320858 16384 32 20216 20743 407229 332800 16384 64 20041 36255 566918 423972 16384 128 26741 35649 745000 632981 16384 256 24996 39835 841368 439675 16384 512 27177 35094 644201 758553 32768 4 4785 5678 221148 260259 32768 8