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 Aug 6 12:58:13 2026 Auto Mode Machine = Linux oleg151-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-oleg151-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 1941 11821 633392 546928 64 8 3454 7805 763021 551422 64 16 4244 31037 901377 763021 64 32 7477 35145 1066042 939223 64 64 3894 62198 1232453 1879725 128 4 4649 6275 571257 473930 128 8 3095 4456 731625 680612 128 16 5810 24255 990891 360605 128 32 3927 63304 947186 770474 128 64 6835 57121 1175271 1206978 128 128 8901 65948 1278855 1885042 256 4 6986 3372 478536 385433 256 8 12317 20740 773697 48724 256 16 7359 20061 1053922 385571 256 32 7110 19950 1173737 913973 256 64 7166 90528 1298662 1185399 256 128 7988 62962 356038 1354356 256 256 9348 55302 1325925 1673001 512 4 6365 7656 302598 287796 512 8 13017 15031 268777 339963 512 16 10798 16940 680918 687237 512 32 27703 50439 888930 962649 512 64 22174 44767 396887 687237 512 128 24456 67138 1438555 1237168 512 256 25839 48645 173270 1380303 512 512 32877 80250 608041 1496706 1024 4 8192 6488 566632 171409 1024 8 12448 18143 803127 336074 1024 16 17335 24109 928479 285630 1024 32 30547 14744 615783 922497 1024 64 26528 29704 1107005 565067 1024 128 14530 44601 608110 731954 1024 256 29387 23280 907105 1063425 1024 512 25403 61615 690975 379688 2048 4 3619 6869 320606 216372 2048 8 5958 8287 854056 147262 2048 16 8893 16394 1131474 623416 2048 32 15855 15277 709337 283030 2048 64 27126 51069 1384846 1259557 2048 128 27753 58887 1502575 704219 2048 256 40040 67648 1030733 1462662 2048 512 31999 144458 1206823 1522820 4096 4 4813 4440 165240 153087 4096 8 7071 1483 696364 586487 4096 16 17731 23049 568177 613001 4096 32 25545 29354 613724 751959 4096 64 24924 35979 910587 601750 4096 128 27357 51332 1133699 754900 4096 256 21298 52668 1252651 438913 4096 512 31697 40074 507862 575601 8192 4 5964 6192 452877 533223 8192 8 10070 11179 482419 469133 8192 16 16174 17190 1246100 608623 8192 32 13539 21360 450213 334203 8192 64 21691 21344 718540 460896 8192 128 25018 36616 812694 738350 8192 256 22570 37392 599303 696898 8192 512 29169 40962 829488 808924 16384 4 3725 4845 250681 223901 16384 8 7137 11594 472910 510072 16384 16 16951 20073 422061 719735 16384 32 29509 30923 623963 748571 16384 64 26907 26965 844667 735173 16384 128 31808 47426 949192 675569 16384 256 37521 48591 438603 499528 16384 512 28344 47884 507230 554149 32768 4 5574 5649 375237 293089 32768 8