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 Jan 9 20:30:44 2026 Auto Mode Machine = Linux oleg249-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-oleg249-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 7657 11924 195680 225423 64 8 7138 33597 718114 388021 64 16 10740 58180 303383 983980 64 32 8283 62313 727850 983980 64 64 12994 64391 1143223 818885 128 4 13163 14028 296318 340264 128 8 21233 27894 365764 79303 128 16 22783 46009 785122 576161 128 32 15257 76100 1048974 584313 128 64 27892 115959 1778862 659704 128 128 26042 149721 1642783 1579934 256 4 15657 12649 230624 230228 256 8 15130 39407 387939 416856 256 16 13947 73184 55482 479390 256 32 34486 87432 924200 805021 256 64 22069 126982 1112909 999940 256 128 42497 142693 1319408 1340826 256 256 21604 172743 1532153 1952947 512 4 16448 20475 305830 365727 512 8 24349 38956 585814 212710 512 16 28348 69955 284291 635951 512 32 48826 90730 1325766 1120344 512 64 27363 115160 1030064 1600443 512 128 61955 168419 2099600 1073309 512 256 79416 251467 1823291 1422357 512 512 81672 180342 1977778 2463259 1024 4 19128 21145 264520 295597 1024 8 31531 36905 436844 435382 1024 16 45691 63618 619513 255245 1024 32 54373 93799 941299 849848 1024 64 40402 131232 1446211 808265 1024 128 79981 142638 1340582 1297649 1024 256 68775 117109 1648862 1646334 1024 512 75151 182432 1825466 1535119 2048 4 17290 21365 248754 254752 2048 8 26706 37270 479863 518096 2048 16 46559 66592 453802 697982 2048 32 74194 78129 906607 759915 2048 64 81172 119549 1189938 1044266 2048 128 84592 148859 1266614 991702 2048 256 94359 109220 1566704 1470172 2048 512 81086 88413 1868674 1516904 4096 4 18936 21627 299171 303543 4096 8 29879 37875 439295 397398 4096 16 48118 61880 705950 636225 4096 32 57257 90023 1094342 1042480 4096 64 61881 90505 1358542 1252925 4096 128 65503 135741 1773899 1327265 4096 256 99533 151004 861413 1422197 4096 512 99844 137081 1889183 1740825 8192 4 18528 19048 328308 289165 8192 8 30287 33259 493314 434132 8192 16 48287 53835 781457 683588 8192 32 67890 82727 767475 580991 8192 64 73647 101401 1580280 1049318 8192 128 90973 119460 1501159 988888 8192 256 99736 156371 1666023 1552084 8192 512 102582 145449 1426910 1552434 16384 4 18443 19337 330203 310733 16384 8 32768 37085 535441 498723 16384 16 45862 56300 513441 511089 16384 32 63059 76371 784784 608191 16384 64 68331 97486 1030310 707333 16384 128 73731 90195 1213828 1168702 16384 256 75980 123097 1224688 553271 16384 512 74104 114695 967814 1372637 32768 4