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: Wed Aug 19 01:58:26 2026 Auto Mode Machine = Linux oleg138-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-oleg138-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 2604 5776 633392 428943 64 8 3930 9602 760859 752329 64 16 4225 19548 983980 1002351 64 32 2755 35778 1232453 250218 64 64 2741 45615 1232453 1562436 128 4 4083 8309 511887 267791 128 8 3489 12201 692017 663782 128 16 4273 11488 1196221 914904 128 32 8811 39357 2098744 1048974 128 64 11150 61746 609522 277050 128 128 7086 91106 1526043 1543594 256 4 4516 10991 573946 440634 256 8 7396 23861 992545 616807 256 16 6906 28422 1008392 317224 256 32 7994 33635 1293967 141434 256 64 13511 56179 1243036 717355 256 128 12754 61671 1610276 577962 256 256 14183 73711 1523457 1368162 512 4 6127 9987 429943 487642 512 8 6477 10389 462938 777002 512 16 13077 23766 1120344 678122 512 32 20837 35882 1293037 655558 512 64 25405 36433 1565443 670082 512 128 25485 74408 1155924 1365383 512 256 17894 55113 1062161 1604029 512 512 26056 85992 1600443 1954379 1024 4 6087 4612 358906 130531 1024 8 12508 14655 561081 204885 1024 16 12309 28388 352369 482808 1024 32 19791 32863 1012771 1284839 1024 64 20236 23711 992182 1074331 1024 128 17017 24973 633681 1103308 1024 256 27091 96339 533615 1363565 1024 512 20960 65662 494937 661089 2048 4 9486 4162 257285 177039 2048 8 11557 10931 905365 778157 2048 16 13829 29775 1174964 577055 2048 32 33244 46513 436196 603233 2048 64 34226 30655 1015862 1306890 2048 128 25683 61411 771379 1333259 2048 256 30213 60604 421141 472420 2048 512 50056 88021 999549 1549185 4096 4 5481 4931 293578 228672 4096 8 8813 8521 263932 508825 4096 16 19219 14453 1043303 904593 4096 32 19130 51292 387040 381776 4096 64 26388 23329 401297 280974 4096 128 27558 60625 1364368 340196 4096 256 33153 72711 718979 1045461 4096 512 45181 54457 1563397 742021 8192 4 3855 4281 247506 299577 8192 8 10197 1542 594091 695121 8192 16 13374 12959 516029 302242 8192 32 21804 21518 241224 530949 8192 64 25663 32207 521456 367700 8192 128 26335 27374 636529 196319 8192 256 26841 86601 708290 584092 8192 512 47595 56085 1449422 580010 16384 4 7722 4615 241484 173292 16384 8 7103 6086 360357 371653 16384 16 11716 11324 454744 755202 16384 32 14835 19146 247089 352221 16384 64 20172 23761 588251 585520 16384 128 31276 28639 548457 653843 16384 256 33065 43419 1133371 645115 16384 512 43559 42446 842111 963539 32768 4 5154 4865 226407 198499 32768 8 6714 9690 587693 261533 32768 16