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 17:10:25 2026 Auto Mode Machine = Linux oleg445-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-oleg445-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 3484 10684 511494 87188 64 8 4525 10932 799377 320021 64 16 3147 34858 1163036 983980 64 32 5455 63298 397796 913649 64 64 5915 45071 955947 1722886 128 4 3448 8548 627328 597981 128 8 5773 25916 354649 794416 128 16 8505 10336 1085013 895074 128 32 9348 33282 1254941 1421023 128 64 4507 82256 1440082 1359835 128 128 14710 33996 55629 1975201 256 4 6976 10504 621448 68540 256 8 11218 26583 833776 727563 256 16 8028 32393 555248 449112 256 32 9152 55388 1407621 1184092 256 64 13854 65206 1354356 1202660 256 128 16252 18277 1132871 1384034 256 256 21552 64093 1354356 1778290 512 4 3771 8455 225865 489979 512 8 12983 11953 81709 243788 512 16 11679 37610 171472 221554 512 32 13684 17348 1108203 416275 512 64 22792 45600 1254513 544796 512 128 27876 46792 1355045 1225169 512 256 26745 42073 744153 633699 512 512 12225 68715 1510391 340448 1024 4 6204 4699 212803 213109 1024 8 12873 22810 404925 708646 1024 16 25131 17324 169729 181269 1024 32 26468 14791 313231 990124 1024 64 20012 98308 281253 1231070 1024 128 31747 70786 815323 675011 1024 256 12825 32897 538364 539785 1024 512 19346 116775 560788 733579 2048 4 7766 5725 276347 252468 2048 8 15506 15008 818571 578026 2048 16 15532 24644 920895 383089 2048 32 17471 29137 606985 356106 2048 64 23827 45070 649335 991244 2048 128 16597 42652 1007285 1313484 2048 256 28821 74507 848404 1429082 2048 512 29074 72155 316880 872268 4096 4 6226 7947 454351 163565 4096 8 11074 14868 441383 217008 4096 16 15370 16769 322470 352430 4096 32 16543 33644 687805 690958 4096 64 27110 51653 807559 690126 4096 128 53257 67529 1009345 417282 4096 256 37461 47891 646472 827474 4096 512 28476 52596 1341149 886025 8192 4 8537 9445 296360 230449 8192 8 10763 14338 233104 398504 8192 16 18414 23394 481938 470753 8192 32 22806 26380 350338 485363 8192 64 24220 27498 547811 517958 8192 128 26132 37643 498387 559761 8192 256 25616 43394 859620 567190 8192 512 27612 36946 485397 708275 16384 4 7324 7832 203424 300066 16384 8 12699 13163 565453 477239 16384 16 19685 21803 329618 228370 16384 32 21176 37928 453801 399063 16384 64 31954 34254 901903 496137 16384 128 32235 39370 356035 427802 16384 256 35292 48933 1169936 646517 16384 512 28990 63578 253022 406369 32768 4 5269 6100 232459 172992 32768 8 8248 13291 431014 456939 32768 16 15541 22552 484828 394738 32768 32