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: Sun Sep 6 22:02:35 2026 Auto Mode Machine = Linux oleg627-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-oleg627-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 1718 2840 695778 551422 64 8 990 6042 727850 614542 64 16 4802 27645 1049372 866463 64 32 1858 30784 1033216 877797 64 64 2550 44875 998622 1933893 128 4 5480 9067 535903 342434 128 8 3725 15822 883293 753179 128 16 8036 26435 1243315 976473 128 32 3457 47074 1093856 942199 128 64 3697 31387 203144 1220700 128 128 3474 80204 47144 1755594 256 4 6605 5452 580461 282875 256 8 9856 18706 757326 737558 256 16 8794 28661 398153 613985 256 32 7909 18291 1126926 1044693 256 64 11414 23869 1274008 980760 256 128 8650 61702 1286217 575175 256 256 13989 38130 1683493 1956506 512 4 3555 5869 253485 269486 512 8 4925 8271 815353 236590 512 16 7470 10864 775879 691887 512 32 10034 16947 819085 778128 512 64 17139 35283 709957 584539 512 128 22293 69480 864942 533827 512 256 14481 59265 1462061 1383861 512 512 29130 62715 264344 317027 1024 4 3122 4679 579554 233678 1024 8 7370 7990 133471 680357 1024 16 10397 14019 926676 540941 1024 32 20912 18468 654341 1015885 1024 64 9057 28944 1291406 952573 1024 128 18618 44728 1499217 361596 1024 256 20901 45321 567606 1013727 1024 512 23172 36210 188443 634805 2048 4 5993 4911 172416 175717 2048 8 11776 11867 391737 251536 2048 16 19786 18423 1201926 999898 2048 32 21411 43746 348125 574931 2048 64 36183 24877 896296 1008941 2048 128 17608 20095 853377 972503 2048 256 21991 45143 1399968 784339 2048 512 23382 89757 320199 336902 4096 4 4124 4830 320551 289863 4096 8 7586 10499 724466 259782 4096 16 15139 22326 656501 466504 4096 32 25734 46046 430122 653480 4096 64 20892 31224 408259 361736 4096 128 35932 23899 1087278 629188 4096 256 25052 41162 500304 381124 4096 512 42449 40569 1835298 1121269 8192 4 4915 2137 250819 145431 8192 8 10584 10910 341817 511428 8192 16 18393 30468 440855 438168 8192 32 19632 27430 695994 447825 8192 64 25182 34582 535775 561747 8192 128 27472 33698 579023 365549 8192 256 28556 47710 1550333 795662 8192 512 35849 67269 853598 1090376 16384 4 7693 7934 322836 212503 16384 8 8833 9884 545332 501529 16384 16 15013 17782 907142 745097 16384 32 19058 24532 770606 815044 16384 64 19550 33491 774218 533541 16384 128 20905 30194 958687 745841 16384 256 31674 40215 586084 864093 16384 512 30918 47047 1388025 755550 32768 4 6737 7717 382285 349748 32768 8 17066 11630 334173 286702 32768 16 15945 17253 478092 496236 32768 32 21698 20819 532484 350051 32768 64 22372 30682 659607 588442 32768 128 29727 39781 582603 778281 32768 256