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 Aug 13 09:50:30 2026 Auto Mode Machine = Linux oleg125-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-oleg125-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 1301 4584 338589 298990 64 8 1524 9012 855419 615952 64 16 2576 12372 733819 581273 64 32 3935 45063 1183548 889431 64 64 4559 58396 1087638 1780008 128 4 4388 9122 526444 506097 128 8 6320 14451 805138 633995 128 16 5845 24451 866192 837806 128 32 7774 39119 1085013 864797 128 64 5318 24816 392505 1196221 128 128 6505 54583 1229084 1254941 256 4 2801 2952 591330 241735 256 8 4186 12261 144149 688381 256 16 3901 7554 476835 507006 256 32 10542 33521 1062263 440634 256 64 6507 26045 318447 1123389 256 128 9905 40321 1319408 520272 256 256 15963 66272 132433 833776 512 4 7506 8089 351654 95237 512 8 8043 8077 108800 187131 512 16 12282 10065 908101 322019 512 32 16321 42366 510478 616772 512 64 20927 35774 1150968 1132755 512 128 26634 47867 739795 1094088 512 256 8467 38498 504956 1267845 512 512 11248 36309 1679288 440256 1024 4 3934 2474 213459 300204 1024 8 6879 8259 291089 667977 1024 16 7833 27086 386140 627111 1024 32 14311 9383 774034 393860 1024 64 21097 13244 1258117 1080004 1024 128 18504 44995 1340164 511195 1024 256 19405 32376 1521524 241292 1024 512 30752 77558 672791 639531 2048 4 3721 4582 151715 362279 2048 8 7304 8215 876362 784912 2048 16 7740 11127 592090 719075 2048 32 24868 18734 1312681 703758 2048 64 25943 23055 501578 278570 2048 128 27658 50974 1587551 707642 2048 256 43909 61313 1588726 1488257 2048 512 35348 48320 1702391 890812 4096 4 4394 4077 222088 220038 4096 8 4038 6306 246275 158176 4096 16 11552 16839 620507 257983 4096 32 18392 21271 371185 907796 4096 64 29029 25050 530508 305763 4096 128 39590 40480 443388 509458 4096 256 17740 38843 565670 1508752 4096 512 15199 56284 723277 556058 8192 4 5942 4829 190977 125937 8192 8 8302 12311 429417 422328 8192 16 17526 18037 711605 651248 8192 32 17202 14404 868156 532785 8192 64 18445 25436 431748 529639 8192 128 25539 34755 845324 970619 8192 256 17710 25878 569361 528377 8192 512 15681 32719 525830 421748 16384 4 3627 6217 394434 384791 16384 8 9708 17137 495672 459229 16384 16 11468 14229 574958 300398 16384 32 13481 19837 280246 352577 16384 64 16398 25156 1261861 594465 16384 128 23617 34240 487068 335112 16384 256 30838 38958 674462 316624 16384 512 34056 46160 876939 665094 32768 4 4674 5229 376280 218558 32768 8 14463 13353 523836 315504 32768 16