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 Jun 23 09:24:36 2026 Auto Mode Machine = Linux oleg337-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-oleg337-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 1622 8391 587635 290890 64 8 2232 14476 727850 627470 64 16 4920 10433 1183548 983980 64 32 2726 15682 100169 913649 64 64 4214 59483 1638743 1310683 128 4 3715 9599 160990 258632 128 8 3600 6207 329812 780556 128 16 2022 19285 1155043 921183 128 32 1842 17495 1152564 1133103 128 64 6732 73727 1359835 1618028 128 128 9190 57947 636249 2132084 256 4 4714 6036 65657 100239 256 8 5471 5613 409542 131750 256 16 6964 16055 973645 761623 256 32 6913 38689 526652 1103757 256 64 8301 59438 1391207 1280084 256 128 9977 28952 70216 748353 256 256 7528 52751 1752173 2247235 512 4 4261 9386 171075 219920 512 8 11099 12011 826016 412596 512 16 14920 31805 1073846 807687 512 32 9581 16825 1204552 1120344 512 64 17021 56831 1333173 488975 512 128 9104 28895 1600443 619262 512 256 15848 21056 648041 914287 512 512 16912 41950 498973 2124526 1024 4 4982 3708 157464 230159 1024 8 4580 8749 626288 209063 1024 16 21872 32894 878171 250921 1024 32 16545 33096 830457 379119 1024 64 18326 42153 1053512 1031252 1024 128 26005 43256 999107 768769 1024 256 31906 40973 1799462 1615374 1024 512 31291 92957 1597351 738880 2048 4 5394 4046 156502 235103 2048 8 6210 18118 967901 861249 2048 16 18221 16089 1169525 326727 2048 32 14846 23111 1066568 1234575 2048 64 28445 26071 341333 837567 2048 128 31282 53856 803788 623416 2048 256 22232 35355 729084 886583 2048 512 23377 60331 824781 361258 4096 4 4117 8569 438924 306768 4096 8 7339 7737 443342 267275 4096 16 10818 11563 564573 361774 4096 32 17430 17185 547586 362155 4096 64 18146 30860 1211487 831157 4096 128 26574 30119 718227 479847 4096 256 20361 57699 202861 575929 4096 512 40693 34156 1775549 455822 8192 4 1774 4296 273104 148809 8192 8 9162 10560 313136 456863 8192 16 11924 19006 588807 336455 8192 32 14780 19167 763264 390412 8192 64 17457 37129 679545 772687 8192 128 29379 38166 823326 1095766 8192 256 24313 34308 729338 507590 8192 512 31451 43380 831093 714268 16384 4 4735 4358 316360 126024 16384 8 8513 8611 637059 325194 16384 16 11623 15937 415196 278056 16384 32 20276 16890 732868 469508 16384 64 24347 24250 689388 648432 16384 128 19876 31584 575603 358551 16384 256 24578 38608 853416 768306 16384 512 21779 39401 1328919 747651 32768 4 4230 5184 233773 231445 32768 8