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: Sat Sep 5 16:16:00 2026 Auto Mode Machine = Linux oleg340-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-oleg340-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 1235 6773 392561 62677 64 8 2173 5351 194545 492717 64 16 1997 15072 998622 355164 64 32 2605 12190 1087638 889431 64 64 2620 14365 1492919 1421755 128 4 4085 3904 518312 162451 128 8 4538 7464 740710 600657 128 16 5207 15558 692017 23000 128 32 4436 13258 267791 122831 128 64 3323 17687 430942 81942 128 128 4987 47799 1363288 1526043 256 4 3378 8417 441540 316103 256 8 6315 15714 460476 339490 256 16 9240 23775 837026 711178 256 32 14413 26706 619655 770920 256 64 7741 21595 302223 143494 256 128 7606 49333 1391207 624339 256 256 6858 35188 790209 239257 512 4 9713 13808 255354 281607 512 8 12334 23656 740816 430978 512 16 5526 9813 469210 441704 512 32 13932 16924 637650 178528 512 64 14185 53967 820337 1045103 512 128 21783 14193 1398278 718028 512 256 5134 31164 1520013 909255 512 512 23789 68871 472721 1747618 1024 4 6228 12190 166447 298535 1024 8 6822 8460 199341 128094 1024 16 8032 10820 437199 227598 1024 32 12727 23981 1258117 223582 1024 64 24687 18877 347354 995171 1024 128 11029 12904 1592612 90828 1024 256 28412 76115 1668074 1556257 1024 512 26327 70301 1706515 177964 2048 4 3159 4028 212533 261427 2048 8 8091 7818 287194 252869 2048 16 8310 10423 550396 837976 2048 32 6012 8968 459900 129767 2048 64 18246 51297 299982 814922 2048 128 22098 25985 1248028 456309 2048 256 16360 28224 347829 1116038 2048 512 21538 35274 536140 485669 4096 4 3482 3921 309788 342018 4096 8 5518 7365 254441 303366 4096 16 11306 10866 221896 374985 4096 32 20707 17044 540658 262380 4096 64 20415 19925 669811 589182 4096 128 16840 68870 944841 895306 4096 256 20668 31388 566528 515095 4096 512 16559 25064 497941 291590 8192 4 4850 7092 185230 424106 8192 8 22779 10466 394491 428677 8192 16 17458 9301 232898 215498 8192 32 10271 14120 496092 253426 8192 64 16507 19623 627119 361488 8192 128 22361 57718 412715 714015 8192 256 21948 28428 902711 300326 8192 512 22486 27877 519800 386178 16384 4 4149 5053 203063 394357 16384 8 7614 7443 196989 241715 16384 16 10647 17472 365877 389363 16384 32 12618 13758 415246 413037 16384 64 14810 21766 465548 251211 16384 128 23572 61451 452721 519465 16384 256 21261 26985 686235 552843 16384 512 37699 32529 1022659 521931 32768 4 4718 5326 204734 306544 32768 8