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 Jun 11 20:46:06 2026 Auto Mode Machine = Linux oleg643-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-oleg643-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 5622 11674 610350 913649 64 8 6539 29424 560635 432398 64 16 5603 46751 983980 743988 64 32 12475 78037 1083249 1188789 64 64 8114 70644 1279447 165312 128 4 9513 14950 633995 127347 128 8 14619 27741 927549 272411 128 16 16299 29379 1093856 831319 128 32 19747 66355 1076312 604036 128 64 9842 90461 1220700 1406136 128 128 17711 96754 1471662 1377278 256 4 11958 12736 442998 478536 256 8 15741 22113 627256 705107 256 16 25879 46334 921029 831194 256 32 28378 79874 2045979 716876 256 64 26714 113673 1312954 1143731 256 128 30277 127935 1662639 1415041 256 256 31706 149968 1639786 2350543 512 4 11405 16693 632020 220984 512 8 19812 32547 484890 673867 512 16 19956 33569 1770674 274235 512 32 23802 78467 1152822 808904 512 64 31702 103166 1179413 1339827 512 128 45596 121184 1434711 1296159 512 256 32282 155571 964378 2225819 512 512 37968 109449 1355045 1264113 1024 4 11691 17064 590227 582778 1024 8 18872 24879 784640 547561 1024 16 19882 53923 814087 970656 1024 32 48084 72748 1162433 1301187 1024 64 46404 103686 936987 1213334 1024 128 67954 131582 1508167 1172909 1024 256 42025 89849 1899750 1393200 1024 512 76870 141987 2584518 1617808 2048 4 16203 18576 673255 539372 2048 8 27268 33317 970196 992275 2048 16 36907 52595 544224 1062347 2048 32 43442 74323 1018874 973826 2048 64 60985 99931 1443248 420008 2048 128 66529 123633 1543340 1088186 2048 256 54977 142371 2100328 1327285 2048 512 64142 57125 1298003 1400881 4096 4 13546 16556 485200 544894 4096 8 22927 24451 1127746 1086178 4096 16 32946 48904 828792 968326 4096 32 58254 66248 662374 1205452 4096 64 68406 84975 1568822 1245748 4096 128 57756 87210 1308662 1300342 4096 256 63852 70698 1381373 1262593 4096 512 72994 107183 1516476 1451516 8192 4 14283 16316 607805 566526 8192 8