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 Aug 3 12:31:02 2026 Auto Mode Machine = Linux oleg641-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-oleg641-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 1177 4124 203236 444572 64 8 1930 14466 385790 621657 64 16 2797 19783 901377 752329 64 32 4230 26523 1188789 426897 64 64 4324 28737 955947 1947927 128 4 3910 5212 320748 451985 128 8 4584 8084 319222 757430 128 16 6945 19820 1015251 85847 128 32 5103 42868 584313 1007629 128 64 4714 62896 1266785 799146 128 128 4094 50850 1240443 1975201 256 4 5638 5024 612584 498995 256 8 4929 10365 706964 363142 256 16 6960 37769 309542 870974 256 32 5618 40809 1040643 471393 256 64 8145 14149 332860 320347 256 128 12844 50845 1447470 958864 256 256 12577 95948 1362952 2000242 512 4 5896 5184 342949 332283 512 8 9972 12265 585814 783808 512 16 9484 11030 737762 491774 512 32 12940 23916 1429934 615359 512 64 11424 35128 1488408 1024169 512 128 17952 25644 640885 718990 512 256 26131 84374 391461 1198502 512 512 15376 63366 1329871 469312 1024 4 4149 4382 423157 567606 1024 8 6597 7259 378551 253453 1024 16 10740 28774 1036478 1034481 1024 32 19790 29322 748016 402195 1024 64 19476 41736 1067654 1278338 1024 128 28704 59942 591609 998874 1024 256 26397 44217 1646334 1492963 1024 512 32881 93609 1689730 1188159 2048 4 6544 6601 357484 284880 2048 8 8199 10467 337564 298450 2048 16 16617 15706 770480 466950 2048 32 25645 22805 515856 447956 2048 64 32448 31783 520576 675425 2048 128 29698 74728 1105126 786782 2048 256 35335 30122 675213 267326 2048 512 45934 66755 288574 638381 4096 4 5302 7206 385105 270613 4096 8 9661 7840 396280 164327 4096 16 11036 16310 461318 493436 4096 32 16479 22402 803931 834063 4096 64 23617 35361 810416 548040 4096 128 24370 42896 1026779 1196302 4096 256 31296 51629 1699663 851381 4096 512 40472 61296 1742237 602426 8192 4 4564 7866 209702 171992 8192 8 9732 2281 461360 442450 8192 16 16162 13599 492720 489777 8192 32 20740 32736 424258 564460 8192 64 20584 24882 685005 428608 8192 128 32474 35816 1013477 831656 8192 256 40928 85322 860589 786843 8192 512 39139 31971 434752 358950 16384 4 5394 4025 202787 165416 16384 8 6848 8586 321071 220529 16384 16 11095 17424 275453 286809 16384 32 12334 16271 912757 462381 16384 64 16474 43701 755517 673708 16384 128 36121 39303 551610 699357 16384 256 24808 35190 566979 373151 16384 512 30657 46030 790853 644304 32768 4 5144 5630 245394 368336 32768 8 7778 11861 305327 306609 32768 16 15510 15946 453492 371953 32768 32