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: Sat Sep 5 15:41:53 2026 Auto Mode Machine = Linux oleg344-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-oleg344-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 2620 6041 627470 488236 64 8 3611 17786 376062 392561 64 16 4165 23399 852702 627470 64 32 3609 53284 1183548 926260 64 64 2230 33173 1392258 1452528 128 4 4831 8439 387966 199076 128 8 3362 9025 331646 681476 128 16 2391 7424 239802 800337 128 32 4337 36717 684081 1172704 128 64 7054 17500 1336145 182063 128 128 4915 56212 1440082 1424795 256 4 3696 9108 618227 365118 256 8 6694 13658 646518 627623 256 16 6882 11931 898674 571502 256 32 7341 11305 1090308 1173737 256 64 10819 48447 973645 416856 256 128 12200 13980 1398455 577962 256 256 16272 72708 1437779 1924938 512 4 6878 5807 206116 348571 512 8 9847 12005 384041 395644 512 16 10312 15917 201891 700234 512 32 15323 36511 528962 990168 512 64 6565 32643 1270094 980673 512 128 17233 57689 1430887 1306409 512 256 17926 49406 137194 1551867 512 512 8454 62961 531186 475337 1024 4 6246 9556 219222 171067 1024 8 7542 8634 200551 468688 1024 16 13020 13204 755118 632095 1024 32 17993 25665 378551 573978 1024 64 16206 32949 1104727 1014925 1024 128 27249 34554 498788 561668 1024 256 23757 60688 417116 869989 1024 512 38412 82600 403935 808265 2048 4 4983 5417 132727 245301 2048 8 9884 13157 939837 441373 2048 16 16973 13842 765059 888509 2048 32 17132 43411 360107 701173 2048 64 20831 46033 399609 246569 2048 128 31125 30385 254502 947718 2048 256 26627 53972 864108 816937 2048 512 40331 50753 492773 767931 4096 4 6952 7925 291214 287501 4096 8 10945 13202 292299 271636 4096 16 18494 31562 315222 424238 4096 32 27517 31656 627831 391173 4096 64 38376 44754 625523 589951 4096 128 47498 43416 1338954 671487 4096 256 47148 64910 1510875 769783 4096 512 30461 55205 572627 627167 8192 4 7562 8229 235421 197403 8192 8 15850 19047 675790 349145 8192 16 22925 25490 408209 270916 8192 32 2613 33357 760561 882562 8192 64 33739 30351 657668 502021 8192 128 48231 40888 744526 867345 8192 256 39311 75024 1247412 1444487 8192 512 34822 96550 1155073 1329875 16384 4 10549 7809 345937 350903 16384 8 12636 11540 408281 278962 16384 16 17489 24595 202923 353217 16384 32 17806 19927 547483 646596 16384 64 17936 20952 796500 599046 16384 128 25798 37534 908905 555314 16384 256 29075 46232 681046 309840 16384 512 32634 42744 689070 1148544 32768 4 6348 8252 330596 272784 32768 8 14241 18183 448839 221190 32768 16 17518 21779 502747 429828 32768 32 33737 34152 617354 520143 32768 64 38397 44024 795047 629014 32768 128 35588 53078 1212188 1013645 32768 256 44586 62705 1162148 751439 32768 512 45943 79294 1477031 1038766 65536 4