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: Fri Sep 11 22:47:39 2026 Auto Mode Machine = Linux oleg602-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-oleg602-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 2838 13308 592827 273409 64 8 3445 22015 913649 204474 64 16 3264 28741 799377 901377 64 32 4700 35592 507625 1143223 64 64 4047 34336 1452528 1780008 128 4 5779 13896 291649 490828 128 8 4638 24686 857887 574312 128 16 9460 29706 1123617 870405 128 32 7424 37670 1196221 907174 128 64 10609 100635 1406136 1406136 128 128 9190 116893 809997 1637771 256 4 7770 8971 229392 573946 256 8 12110 17151 242390 738065 256 16 15848 38776 321980 436160 256 32 13945 13951 132990 1158540 256 64 13810 20243 140508 799625 256 128 27382 128965 1740810 1267990 256 256 15702 75182 1453348 1778290 512 4 8324 7633 493242 492790 512 8 18220 20773 790153 149060 512 16 13180 31874 1145443 551088 512 32 21402 19597 197764 1110496 512 64 23077 57387 184907 511451 512 128 27836 73351 179273 1209982 512 256 12243 45450 1650887 1110496 512 512 34822 117030 1594501 2047551 1024 4 9148 7478 289363 205709 1024 8 17339 17396 689533 452682 1024 16 19676 19308 464833 572066 1024 32 36493 26089 989440 763711 1024 64 30945 63322 620229 891107 1024 128 25364 54028 524620 1089317 1024 256 32493 70227 1219189 962391 1024 512 44510 82587 720051 1790460 2048 4 7614 8373 268344 231854 2048 8 14652 22088 465130 500497 2048 16 14182 29774 1203947 592253 2048 32 23861 45441 500613 608403 2048 64 38505 59293 554124 932998 2048 128 29034 40583 1516904 1177057 2048 256 25314 65716 485778 572250 2048 512 39028 39725 333501 778087 4096 4 9537 9096 330752 261124 4096 8 10631 12669 365912 252045 4096 16 16334 14175 300469 626572 4096 32 20712 30172 690625 594833 4096 64 30718 37126 464712 512834 4096 128 31503 38146 930714 1111835 4096 256 28262 62122 1675299 729481 4096 512 29119 115179 633153 521316 8192 4 6092 2164 523387 210321 8192 8 11787 12420 579639 448708 8192 16 17108 21886 771386 475259 8192 32 22398 31584 833553 447381 8192 64 20002 32045 548616 943021 8192 128 31729 45601 639455 999270 8192 256 34490 57985 675630 1276421 8192 512 42200 60279 957340 710487 16384 4 8257 9406 191205 257116 16384 8 12505 14263 407947 302896 16384 16 19278 24968 382250 438416 16384 32 31137 36604 1086975 735598 16384 64 26248 36087 507368 473800 16384 128 33434 44319 858877 297339 16384 256 30688 67131 969699 730904 16384 512 34406 64815 1238773 623867 32768 4 6207 7384 211742 247824 32768 8 10482 12740 426737 349547 32768 16 21891 23780 588198 285092 32768 32 24305 30359 1169038 712422 32768 64 29849 37928 884023 458884 32768 128 36968 57140 913951 597771 32768 256 46304 51109 526106 506273 32768 512