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 Aug 15 18:07:51 2026 Auto Mode Machine = Linux oleg453-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-oleg453-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 3870 10816 592827 170240 64 8 3362 19346 703068 821391 64 16 5916 42583 561808 349613 64 32 5478 24904 566551 1210227 64 64 7293 66464 239716 1210227 128 4 7058 10639 643108 579270 128 8 11856 12996 483316 574312 128 16 6739 28163 1040839 432330 128 32 14582 50898 1377278 339618 128 64 11680 24648 29725 1521718 128 128 8107 57371 1206978 2202044 256 4 4517 5521 294595 519266 256 8 8185 7105 879535 744204 256 16 6008 14126 1190657 480248 256 32 14104 42531 1369908 97006 256 64 22607 101547 1437779 679237 256 128 13117 92917 1391207 1610276 256 256 22672 88302 1729594 2081678 512 4 5114 5672 304055 310697 512 8 11721 20582 725303 701378 512 16 7354 27131 920953 475022 512 32 12173 23835 516743 167369 512 64 16122 71647 1343179 723349 512 128 28890 79442 1073309 1212715 512 256 36771 76885 488641 1589779 512 512 22992 127904 1785395 2107844 1024 4 5270 5416 344650 315370 1024 8 16928 16024 909410 587160 1024 16 23782 24789 443703 579476 1024 32 11500 19631 446935 516668 1024 64 37037 31871 603411 526485 1024 128 27971 38832 1216082 1281771 1024 256 41576 60854 938420 731331 1024 512 33229 90571 185505 1577404 2048 4 6441 3959 206410 97691 2048 8 4969 8624 911031 750159 2048 16 20513 20464 1199744 558193 2048 32 23310 36929 354636 696115 2048 64 24050 51510 451393 694259 2048 128 34023 60334 324358 605188 2048 256 44974 55191 903841 814612 2048 512 29732 65383 1699696 984090 4096 4 5533 6895 370512 202352 4096 8 11028 8450 271186 244888 4096 16 22460 10841 306308 314835 4096 32 13738 24209 571751 464448 4096 64 24228 28870 480706 277502 4096 128 24957 32044 1588257 452497 4096 256 36038 40682 1180357 524996 4096 512 23992 57436 394950 844725 8192 4 5693 7068 143686 298086 8192 8 10803 12933 452722 318556 8192 16 18031 20362 593454 315940 8192 32 25085 27417 926592 802970 8192 64 25630 40055 988405 671248 8192 128 26487 39498 891307 550506 8192 256 34827 51636 784382 911355 8192 512 31278 60807 583398 295965 16384 4 5020 7639 255205 255844 16384 8 8595 11326 272430 255911 16384 16 15682 22910 491289 407330 16384 32 25375 26687 324370 505633 16384 64 19467 34427 930164 440160 16384 128 40139 37286 975355 409815 16384 256 32950 54001 829186 852759 16384 512 38559 54318 1116540 881484 32768 4 5589 5251 328567 298327 32768 8 10464 11705 209233 407962 32768 16 14529 16696 766625 776878 32768 32