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: Sun Aug 9 16:10:58 2026 Auto Mode Machine = Linux oleg210-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-oleg210-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 1334 9878 610350 429630 64 8 2025 4584 718114 639427 64 16 3698 24043 323102 640954 64 32 1662 21540 1163036 576282 64 64 1208 12924 1336792 1492919 128 4 4270 3742 627328 479432 128 8 1736 15455 592699 531131 128 16 2569 7413 901083 871818 128 32 4254 19101 247086 1048974 128 64 9306 38811 1165070 1373754 128 128 5954 70438 1377278 352553 256 4 2667 2037 644578 583299 256 8 3312 6486 778183 147293 256 16 7284 12828 930608 687940 256 32 9103 13010 856386 1028679 256 64 9076 37487 707430 1023775 256 128 10029 61494 1347557 1447470 256 256 6884 56202 755195 2065659 512 4 3636 5075 280687 386112 512 8 4626 5087 669247 422084 512 16 6826 13748 1047141 519241 512 32 6610 14450 1127995 710192 512 64 15649 10292 971797 455476 512 128 15277 24630 407275 765371 512 256 4763 15892 454320 735488 512 512 10956 47940 257158 112229 1024 4 3756 3977 608455 509981 1024 8 5617 6504 745291 283032 1024 16 5561 6875 751287 996094 1024 32 10297 17071 1102176 421041 1024 64 11781 30092 1010864 301088 1024 128 19172 34514 1462960 1229309 1024 256 16756 43133 1239598 456532 1024 512 17385 61343 733078 207789 2048 4 5690 8319 292196 148159 2048 8 6338 8563 668383 156596 2048 16 12920 7606 995725 326479 2048 32 18084 22408 626691 641384 2048 64 21199 20737 286753 259665 2048 128 19826 37068 237174 466418 2048 256 34612 30350 1351722 268026 2048 512 26679 33085 995149 720402 4096 4 3151 4266 137634 249544 4096 8 9909 6670 506186 452747 4096 16 12402 16290 557122 440613 4096 32 21738 1568 855281 646447 4096 64 25819 38053 422360 338654 4096 128 22640 25359 696025 303988 4096 256 25251 57306 381623 337928 4096 512 25790 54950 783938 633177 8192 4 5232 5501 319302 297814 8192 8 6753 5925 153506 311729 8192 16 8507 15245 343680 400917 8192 32 15241 15004 340479 386160 8192 64 15807 31264 443146 465611 8192 128 27092 26084 770729 716218 8192 256 31932 40116 538488 551018 8192 512 26259 46775 593834 415711 16384 4 5997 4091 213636 184017 16384 8 8689 8985 245861 178051 16384 16 7442 13048 300761 236745 16384 32 9807 13787 498357 431011 16384 64 24612 19857 730709 405004 16384 128 21320 30513 651815 523537 16384 256 35839 33559 506617 796656 16384 512 32036 38224 814435 684751 32768 4