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 27 06:11:27 2026 Auto Mode Machine = Linux oleg132-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-oleg132-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 1962 3592 133562 423529 64 8 1868 6898 89783 633392 64 16 3114 23835 359444 640954 64 32 2250 44503 1210227 929467 64 64 3504 84312 1226821 1828508 128 4 4723 9785 597981 359398 128 8 5347 14092 831319 174433 128 16 8281 28281 908709 637004 128 32 4665 42384 1085013 753179 128 64 8413 41803 1206978 887675 128 128 8592 118519 1539168 586868 256 4 5489 10718 541253 393772 256 8 9576 14713 292907 332963 256 16 8874 25666 823544 827989 256 32 8911 38676 1053922 338207 256 64 15670 62271 718796 528987 256 128 8877 45309 1407621 678807 256 256 8355 72336 725106 1924938 512 4 4851 9950 383492 229387 512 8 11651 15501 643189 400291 512 16 15194 20017 544106 630536 512 32 11110 55412 1036027 498973 512 64 27670 63217 984720 1233614 512 128 11084 37707 837942 661414 512 256 11983 29729 1339827 724325 512 512 23033 67058 446016 2141475 1024 4 4881 5248 292576 214535 1024 8 12855 10661 823136 1040496 1024 16 17060 15852 320500 194229 1024 32 14780 22287 399241 483242 1024 64 48713 49356 1648862 900449 1024 128 13514 53997 1328146 981750 1024 256 26770 46946 477600 342124 1024 512 22978 46783 1167489 586519 2048 4 5943 6995 279549 183100 2048 8 5825 13481 495759 332301 2048 16 18955 25603 382577 418290 2048 32 22031 29311 577870 410926 2048 64 23085 31283 744696 452702 2048 128 35189 31718 286113 420275 2048 256 35948 75296 1475476 340211 2048 512 47624 78542 447070 686052 4096 4 6547 8170 366302 265749 4096 8 10694 11526 1015370 392415 4096 16 38491 18405 410208 456222 4096 32 17096 37514 332577 421056 4096 64 21304 35433 744303 761761 4096 128 23709 20120 498605 473525 4096 256 39634 49146 784082 269488 4096 512 73975 65185 828112 689212 8192 4 5370 4771 175929 329948 8192 8 8425 8255 517724 441762 8192 16 9879 16018 625532 518091 8192 32 18232 24711 435701 390541 8192 64 19067 31061 473367 612486 8192 128 28296 31114 515673 289643 8192 256 22706 23698 589899 262236 8192 512 22031 56275 780782 503411 16384 4 4825 7171 509071 351549 16384 8 5881 6913 150275 249509 16384 16 8113 15270 499604 625297 16384 32 23422 25324 718373 559259 16384 64 29125 29631 615474 516956 16384 128 18280 28277 553922 751666 16384 256 36038 21688 505476 843320 16384 512 35559 29466 651376 385705 32768 4 5020 5337 315156 445285 32768 8 7847 10039 304738 467000 32768 16 13082 14434 299963 405388 32768 32