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 Sep 4 20:44:11 2026 Auto Mode Machine = Linux oleg443-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-oleg443-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 3433 9962 347801 188798 64 8 3379 11972 712397 695778 64 16 6238 45809 1087638 104947 64 32 8287 47378 1310683 1119387 64 64 6055 60149 413101 1553394 128 4 6422 10799 518312 524900 128 8 2947 23920 655675 330625 128 16 5427 50411 1172704 948860 128 32 11701 47599 1254941 985435 128 64 10466 95599 310006 757430 128 128 10746 84937 650117 1243315 256 4 5616 9849 335984 471600 256 8 7189 8894 880256 384329 256 16 15254 16752 324020 742146 256 32 22729 55350 771473 894929 256 64 12011 35246 485898 1254656 256 128 24263 79478 1413179 1600674 256 256 16263 92350 1579483 1956506 512 4 7848 10413 110821 552363 512 8 8632 14835 59584 467575 512 16 8158 15774 1169140 912733 512 32 30140 32359 801059 853596 512 64 15820 29770 808904 1270094 512 128 34820 93260 1450212 996139 512 256 29882 82726 1789859 836636 512 512 24626 95453 702295 2225819 1024 4 10793 12601 363278 180310 1024 8 9190 8967 632467 411245 1024 16 16172 16410 876737 1016847 1024 32 33489 21383 971534 194714 1024 64 34518 69446 1234964 863343 1024 128 45960 53691 944612 532821 1024 256 36679 24306 567006 1554004 1024 512 37075 35314 1689730 909410 2048 4 5880 5349 247578 179966 2048 8 7458 9186 260658 192337 2048 16 12325 12598 663632 349898 2048 32 24506 33364 1129688 326640 2048 64 19702 34828 604124 404979 2048 128 28981 54453 1518244 762478 2048 256 34955 47510 405208 448518 2048 512 30813 49737 457134 559867 4096 4 8302 8211 273030 213277 4096 8 13541 17212 515156 411821 4096 16 15907 18221 566435 338061 4096 32 20124 26598 443765 213834 4096 64 25959 19225 1091977 450456 4096 128 25470 33406 366857 394714 4096 256 32739 54687 270810 214159 4096 512 33508 59426 606188 885797 8192 4 6150 5416 210666 204958 8192 8 14811 11662 364703 452394 8192 16 14711 10929 640504 339916 8192 32 20423 38406 330990 406673 8192 64 20880 34117 756209 519501 8192 128 31103 37938 904779 688754 8192 256 31833 46308 1233928 992144 8192 512 40133 62190 1249953 825879 16384 4 5297 5810 236615 178667 16384 8 8434 10337 475009 238389 16384 16 13973 17742 666882 228484 16384 32 22913 31485 804321 469861 16384 64 26052 36289 694060 320030 16384 128 29838 56465 719607 365852 16384 256 30801 49582 1000431 815731 16384 512 38745 54104 1217873 667835 32768 4 5233 5417 170130 245827 32768 8 8434 10344 238536 237446 32768 16