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: Tue Sep 1 09:38:21 2026 Auto Mode Machine = Linux oleg436-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-oleg436-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 4184 11644 477808 576282 64 8 6018 23205 811459 647135 64 16 8065 50431 1033216 866463 64 32 6177 69205 1933893 620221 64 64 7932 106319 1492919 2561267 128 4 6546 17071 506097 462100 128 8 17645 25386 809997 646983 128 16 15951 43112 1057236 170662 128 32 12705 85723 722760 940549 128 64 13378 108858 1294270 278777 128 128 15918 109302 2558895 1642783 256 4 10754 12314 659625 753077 256 8 21315 22861 1649865 773140 256 16 25566 48713 1112909 969251 256 32 20892 34886 1027695 750970 256 64 24801 78188 1361224 1514860 256 128 33916 98955 1213534 963164 256 256 21345 128779 2170027 1842366 512 4 14324 19649 524056 772252 512 8 23355 27809 179393 586454 512 16 35617 62729 480334 593915 512 32 31575 60980 1245780 890404 512 64 35227 109493 1344020 1014013 512 128 43645 121878 1354190 1551867 512 256 39296 148544 793951 701378 512 512 47437 193139 1492545 2073249 1024 4 15047 15060 529210 585160 1024 8 24908 28865 752472 738880 1024 16 34350 55840 301088 649787 1024 32 40697 84039 1422266 1244266 1024 64 33190 117835 1360111 1024854 1024 128 68280 83646 1079190 701814 1024 256 77551 129211 1570483 1251882 1024 512 71965 146897 224505 1412443 2048 4 14149 17853 598651 387723 2048 8 24920 31728 622512 418984 2048 16 31831 47164 1421279 439477 2048 32 36743 48844 1284801 1189279 2048 64 57468 64200 1499428 1031848 2048 128 43025 120535 528520 1006813 2048 256 64053 108422 1226992 1066700 2048 512 74178 131536 1723915 852954 4096 4 17330 19903 657657 597419 4096 8 25557 29307 485542 475556 4096 16 36172 52335 1007628 971063 4096 32