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: Wed Sep 9 04:06:20 2026 Auto Mode Machine = Linux oleg633-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-oleg633-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 2036 6611 653436 546928 64 8 3550 4985 659861 576282 64 16 4011 41833 1066042 659861 64 32 6042 54517 889431 1087638 64 64 3608 12880 1518251 780776 128 4 3243 2402 444501 247999 128 8 1751 5565 761728 515822 128 16 4650 17904 60953 592699 128 32 8099 41747 1114289 316961 128 64 4265 17546 1349580 1015251 128 128 10533 34830 1040839 1663139 256 4 4141 1853 544547 457143 256 8 4367 5928 305926 285432 256 16 10346 25559 937924 524593 256 32 15595 42702 1142514 589706 256 64 13752 35457 567875 697322 256 128 26750 68084 792543 1153561 256 256 6443 34882 1219045 2081678 512 4 3166 6623 488530 396887 512 8 7462 9809 201891 61575 512 16 7230 18378 464139 978885 512 32 5889 12220 1060063 955368 512 64 28276 37641 863551 1100818 512 128 12867 59737 1437592 707152 512 256 19480 45141 1546280 1329871 512 512 19607 56574 875164 1952602 1024 4 10722 9501 137708 452921 1024 8 14812 17031 167537 480754 1024 16 10317 8895 728849 364666 1024 32 9431 12244 1109579 351648 1024 64 28234 24758 324251 634805 1024 128 9559 39734 1002137 1213334 1024 256 17175 26021 666629 574977 1024 512 25911 24613 567306 1004011 2048 4 3838 6225 111803 67392 2048 8 5871 10259 316099 263504 2048 16 15057 17452 542780 482017 2048 32 14884 29844 497569 373657 2048 64 23198 35913 740971 1011913 2048 128 20621 46986 927558 493594 2048 256 63733 49149 477701 263917 2048 512 48329 37164 142666 678841 4096 4 872 8238 491600 250798 4096 8 15594 17204 761458 356385 4096 16 8627 18429 388063 304695 4096 32 11983 14965 365382 559717 4096 64 13100 31651 723307 243345 4096 128 31548 24636 622485 707549 4096 256 51691 83279 368178 265815 4096 512 31352 43330 1121269 1064440 8192 4 7191 7370 284009 156305 8192 8 10205 13504 437092 225599 8192 16 14047 13877 212145 308549 8192 32 21674 17315 307242 232140 8192 64 19040 35246 826137 617749 8192 128 24204 33149 916020 311354 8192 256 27127 46012 767030 500332 8192 512 41383 36897 784150 687417 16384 4 6194 6375 306622 183833 16384 8 8243 8949 531358 410832 16384 16 13644 18228 366246 501961 16384 32 15646 26920 790053 350145 16384 64 20901 28944 996052 708405 16384 128 27170 53585 1002328 748025 16384 256 30943 36347 578818 673516 16384 512 30529 43109 1287030 724668 32768 4 5385 5756 196469 268143 32768 8