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 Aug 14 08:35:58 2026 Auto Mode Machine = Linux oleg640-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-oleg640-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 1094 5129 496362 500060 64 8 3045 8711 852702 789967 64 16 3566 32800 1255511 326244 64 32 6210 49156 1255511 1029254 64 64 1683 72730 1553394 942521 128 4 2793 5471 299124 559353 128 8 2258 18354 940549 795593 128 16 4002 18040 789741 1000121 128 32 8750 37982 1007629 1093856 128 64 9781 54627 1377278 1231904 128 128 8805 61386 201845 2004703 256 4 3540 4634 393340 298029 256 8 8369 14103 794889 476624 256 16 12368 28803 822913 175683 256 32 15650 42377 1384034 1163562 256 64 13231 64047 807442 1280084 256 128 10723 46242 1158540 1455317 256 256 18964 23987 1514860 2223962 512 4 8774 5777 416598 342675 512 8 8659 17109 1055375 614654 512 16 15720 19511 608041 706221 512 32 9920 36084 214774 622855 512 64 23381 24583 1357615 376764 512 128 11117 34575 1574625 814117 512 256 13769 25504 1394645 1387437 512 512 26463 67518 879465 2160868 1024 4 5673 6463 621305 452873 1024 8 6956 10136 843505 540124 1024 16 18151 22873 963255 630981 1024 32 15976 28623 760197 458334 1024 64 24334 31317 535879 1229309 1024 128 26340 41523 568207 1414304 1024 256 23399 68923 1793451 1597351 1024 512 20743 76492 1738286 864212 2048 4 6261 6813 291532 455124 2048 8 11965 19407 886126 490662 2048 16 14026 24879 700886 395980 2048 32 31215 26304 618345 390171 2048 64 20643 52623 788660 458061 2048 128 23136 49664 527546 1413328 2048 256 32343 55141 1375532 669268 2048 512 28516 60764 1244953 1607456 4096 4 5936 7115 330269 385684 4096 8 13626 10077 792875 609176 4096 16 20814 15744 705341 400147 4096 32 18066 41363 1343877 604588 4096 64 28690 34145 946402 641714 4096 128 36494 42464 1633252 428812 4096 256 24870 45016 1117331 600677 4096 512 56663 61775 823310 693189 8192 4 7634 6369 199197 233657 8192 8 12644 11279 546461 378503 8192 16 14153 22970 580824 716891 8192 32 33784 26208 458987 379259 8192 64 31768 38363 836699 556371 8192 128 3209 37816 520327 747441 8192 256 42310 35881 899238 358243 8192 512 25741 39369 1175021 1139520 16384 4 6581 5895 265762 309342 16384 8 9664 10632 505068 485263 16384 16 17249 20023 573145 433119 16384 32 19804 25485 729476 644836 16384 64 27660 42487 631637 525567 16384 128 30062 32681 1170613 911026 16384 256 37312 52296 797970 996341 16384 512 31992 40613 697193 886773 32768 4 6319 5763 264087 290185 32768 8 10338 12380 406525 415125 32768 16 14219 16060 653153 526056 32768 32 25409 31750 638814 338802 32768 64 22907 37320 860349 517026 32768 128 32452 41276 566686 861341 32768 256 31710 71307 1142137 992218 32768 512 33593 62806 581063 687508 65536 4