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 10 19:38:28 2026 Auto Mode Machine = Linux oleg358-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-oleg358-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 3366 7318 467002 532815 64 8 1807 13311 285628 586352 64 16 5960 17315 752329 969761 64 32 6004 23711 1204796 926260 64 64 6977 62386 1105556 1780008 128 4 3713 7999 598647 323064 128 8 8655 16884 852438 576780 128 16 3273 28368 895074 684954 128 32 3847 36812 1121270 752124 128 64 5476 46394 221499 962469 128 128 10755 64747 1471662 955616 256 4 2388 4281 136455 440634 256 8 11403 23376 638445 695516 256 16 11077 29843 1062263 753077 256 32 11634 27687 1142514 1031644 256 64 9574 46776 1311351 326087 256 128 10065 63352 833776 1506359 256 256 10092 62045 1523457 1398455 512 4 9235 5756 237138 275113 512 8 7624 16298 768658 87929 512 16 8251 30750 269486 774759 512 32 9030 29562 799865 727268 512 64 12926 25269 381245 265422 512 128 18607 43689 1463057 1196499 512 256 33958 69536 1580419 1551867 512 512 11988 91410 797489 1264113 1024 4 5967 7201 559910 230889 1024 8 9825 13859 152450 764255 1024 16 12956 28460 751287 551995 1024 32 21984 20629 863343 217590 1024 64 11313 41887 776413 523023 1024 128 27264 48650 506433 840698 1024 256 24329 55363 473180 1108148 1024 512 37430 75913 478078 1378002 2048 4 5225 5445 375716 405859 2048 8 15505 13189 874132 709864 2048 16 12675 17405 964207 772837 2048 32 26018 20090 519004 315472 2048 64 27781 45517 855502 1094007 2048 128 20284 56048 1300361 684522 2048 256 26573 48801 588520 264706 2048 512 38731 51555 878962 687920 4096 4 5064 5665 368581 234058 4096 8 12192 8548 480760 237570 4096 16 9147 12912 401766 535785 4096 32 18577 30046 474676 511735 4096 64 25630 67335 663550 687255 4096 128 26357 50042 939057 1242684 4096 256 49511 66803 1144119 1335416 4096 512 38368 50814 683454 829993 8192 4 7647 6781 259372 234539 8192 8 12433 13554 417895 373382 8192 16 17399 21691 617894 273778 8192 32 21729 34877 274788 340226 8192 64 38459 39582 553887 362303 8192 128 35049 52244 811178 532017 8192 256 41184 45667 511269 722149 8192 512 35664 57618 736893 687706 16384 4 6825 5951 165684 242378 16384 8 9002 12099 427211 379471 16384 16 15658 24411 298809 336731 16384 32 24286 44152 542821 621953 16384 64 24564 31253 400528 328784 16384 128 42739 42213 562634 665558 16384 256 39890 51715 856106 959584 16384 512 34723 73447 901501 456481 32768 4 5622 6520 165625 361024 32768 8 10629 10143 877017 348132 32768 16 18554 24945 657713 337964 32768 32 32725 34654 612451 312031 32768 64