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 Jun 11 23:27:58 2026 Auto Mode Machine = Linux oleg359-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-oleg359-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 3481 10774 409946 608965 64 8 4357 20011 592827 769584 64 16 3172 26123 1599680 889431 64 32 4007 32637 1452528 703068 64 64 3034 53475 1357066 1879725 128 4 3533 5765 579270 458940 128 8 4871 13961 278922 800337 128 16 8711 25995 348888 204537 128 32 6036 36908 1487977 1254941 128 64 8014 50157 1269781 274080 128 128 5516 58287 776042 1827299 256 4 6190 4447 118845 301883 256 8 6991 16334 425277 335041 256 16 7851 9860 897923 930608 256 32 7206 33040 1122215 1122215 256 64 8619 52075 1272498 1407621 256 128 17212 41565 1652404 680960 256 256 13131 86810 1591186 707430 512 4 4779 6316 498973 217779 512 8 11049 13458 560290 135344 512 16 9510 15562 254597 941133 512 32 17265 19415 1248678 307142 512 64 26533 49511 1523247 1103080 512 128 26257 42838 270334 984720 512 256 16678 22324 1650887 836636 512 512 19574 34385 608213 2187279 1024 4 6052 6462 616490 413581 1024 8 8398 14018 505182 415421 1024 16 12606 14942 579476 425252 1024 32 26277 23530 656441 471673 1024 64 14196 40693 729344 719087 1024 128 27195 45094 805084 1229309 1024 256 28208 38911 951728 1861867 1024 512 33351 39714 127489 1464956 2048 4 5382 7310 340927 239388 2048 8 7400 12397 198259 411576 2048 16 18332 17416 525673 408795 2048 32 16941 21163 855843 452797 2048 64 23449 34292 457256 340873 2048 128 39525 61352 1753475 1077404 2048 256 39104 65983 845898 1460673 2048 512 28330 30967 1587845 899393 4096 4 4725 12225 188896 104620 4096 8 11290 11924 281435 514447 4096 16 14778 23847 531591 683808 4096 32 22445 39668 1093158 635025 4096 64 23882 29710 1047054 888500 4096 128 41170 78831 1562828 582076 4096 256 49398 102325 709390 570081 4096 512 47900 60383 1396532 640089 8192 4 5375 6657 434978 345637 8192 8 7466 8113 570354 641508 8192 16 12497 14522 342847 398966 8192 32 21238 16646 373330 412111 8192 64 20506 40648 878972 401156 8192 128 37860 45417 504401 535466 8192 256 30409 39475 1214691 586235 8192 512 44927 62627 1665377 1149777 16384 4 5779 7040 309008 264308 16384 8 7306 8331 319002 203902 16384 16 17360 22802 838576 483790 16384 32 27301 28919 644026 343515 16384 64 22052 35572 866195 718185 16384 128 35262 36511 956272 859145 16384 256 28548 39530 1089508 709114 16384 512 30735 43528 513330 636593 32768 4 5186 6476 235720 201560 32768 8 8061 10286 443547 384460 32768 16 13883 16471 754343 480418 32768 32 24020 25812 463642 744963 32768 64 24890 25761 734461 508622 32768 128 24872 36065 1045538 684948 32768 256