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: Mon May 11 17:34:49 2026 Auto Mode Machine = Linux oleg226-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-oleg226-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 2961 20472 576282 538156 64 8 3705 20698 615952 440921 64 16 12202 53699 955947 735831 64 32 13459 47303 1049372 485587 64 64 14662 48194 1101022 467815 128 4 10247 9308 69562 730629 128 8 10840 46009 544601 430942 128 16 9076 8503 1332828 533241 128 32 18071 51717 1102844 962469 128 64 29788 81371 1346196 1377278 128 128 28914 114598 1346196 2238774 256 4 8870 24941 363634 837026 256 8 22019 24198 1112909 1197295 256 16 23956 73985 633548 567575 256 32 18672 45455 828628 870268 256 64 26817 52575 1855098 785010 256 128 26329 188349 1422540 1040643 256 256 50098 208663 1243036 1430119 512 4 12005 21629 881269 480227 512 8 24196 42335 349764 664073 512 16 30252 56617 967855 829847 512 32 39442 51117 764281 300818 512 64 83524 67058 1147892 1098566 512 128 43839 69678 980673 1267097 512 256 34190 63305 1406520 1326585 512 512 48360 180600 2449212 2178404 1024 4 7976 11486 451493 566408 1024 8 22955 12664 273289 439077 1024 16 23228 41963 1223356 610965 1024 32 30820 66196 1134192 735086 1024 64 42062 57690 1254808 1060274 1024 128 35238 86399 846164 1227903 1024 256 66141 116231 1460969 267852 1024 512 51021 97551 1620249 393823 2048 4 19256 14291 420029 645432 2048 8 29770 23374 567149 641240 2048 16 25490 58347 583801 776961 2048 32 63928 58869 1351935 1011317 2048 64 39458 69550 1618968 799003 2048 128 41764 62939 1421279 643787 2048 256 91616 88658 1472440 1290592 2048 512 61232 106109 1521471 1637174 4096 4 14908 14359 340284 286494 4096 8 16459 22423 663320 413277 4096 16 25610 25464 587329 654226 4096 32 36121 40251 1004447 817084 4096 64 33809 60720 1233405 1195886 4096 128 60703 104274 817551 773247 4096 256 72440 79207 1531209 671041 4096 512 46414 60475 956786 1750581 8192 4 10174 12326 478729 395440 8192 8 20096 20637 850155 528515 8192 16 25565 28014 668740 521520 8192 32 29966 32910 826893 469082 8192 64 38491 74139 1057456 432231 8192 128 41683 70310 1322759 1257409 8192 256 42089 75714 770867 976078 8192 512 62730 108539 607805 501559 16384 4 3214 8106 282050 257226 16384 8 12040 14726 467527 450779 16384 16 22217 34827 696190 661789 16384 32 34859 44319 885379 1007265 16384 64 36998 70819 1296623 761056 16384 128 47550 64180 510277 786553 16384 256 64701 64876 758168 802621 16384 512 73694 48847 559391 1548998 32768 4 12006 15373 469671 495343 32768 8 29546 34759 605837 748966 32768 16 48864 55474 834299 1063828 32768 32 69348 65706 1375189 974572 32768 64 61025 107219 1351378 780447 32768 128 67577 92094 1307998 1240414 32768 256 86466 100332 881359 1288705 32768 512 71016 98338 1481313 1300165 65536 4 14632 14333 513484 492526 65536 8 20970 24209 587193 395851 65536 16 27339 35670 475798 680428 65536 32 35730 48714 1243168 895435 65536 64 40518 62894 917238 591074 65536 128