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 Sep 5 17:28:37 2026 Auto Mode Machine = Linux oleg614-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-oleg614-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 4741 10902 620221 516414 64 8 5342 20324 789967 587635 64 16 3101 10902 1049372 831569 64 32 5315 39361 528618 592827 64 64 3954 58986 1255511 1484662 128 4 7731 11218 589446 511887 128 8 7689 12598 859260 707520 128 16 6052 29886 257022 859260 128 32 8115 33464 1185654 940549 128 64 13882 61120 1377278 1436229 128 128 12900 84937 320174 624409 256 4 4340 5608 600928 54306 256 8 6052 12661 713541 778183 256 16 16345 29667 1084800 1031644 256 32 12089 52727 561343 970126 256 64 28780 81093 1384034 1262029 256 128 11277 118295 1213534 644965 256 256 23035 89952 265003 2187712 512 4 8095 5170 194680 366789 512 8 10222 20296 259897 72922 512 16 21899 30598 1240025 951558 512 32 14334 26914 1451192 1329871 512 64 13739 52717 1219602 864942 512 128 14497 40239 1446306 1160923 512 256 12658 78842 1454140 785241 512 512 36624 96132 806171 741072 1024 4 7088 8396 296556 243467 1024 8 6695 8251 445037 273359 1024 16 10940 41422 977282 775152 1024 32 34787 60128 709114 1097388 1024 64 17443 64252 1452570 599872 1024 128 31858 62381 1367037 946276 1024 256 38226 85612 989212 1330203 1024 512 57762 49285 1085737 1756054 2048 4 6979 4197 219816 178849 2048 8 7741 17662 401646 547589 2048 16 13051 19923 1365474 1008349 2048 32 21469 30430 1336787 467052 2048 64 31595 35674 724167 1203947 2048 128 32527 55272 1569280 1423162 2048 256 24391 73358 967901 671046 2048 512 36195 79235 1129688 809164 4096 4 7854 3649 328180 234205 4096 8 8769 7949 602975 468004 4096 16 10705 17228 276106 416938 4096 32 22804 25754 950802 188347 4096 64 16314 33367 181569 188738 4096 128 1364 87676 549425 327629 4096 256 30289 47356 795040 965768 4096 512 17651 26445 385615 457497 8192 4 6815 5341 238050 338623 8192 8 9708 13294 557916 371437 8192 16 10226 17378 423489 270177 8192 32 9028 12842 395900 285375 8192 64 11291 24725 374167 566293 8192 128 17246 36775 958141 603111 8192 256 37618 28324 278763 302959 8192 512 28763 30559 880007 394967 16384 4 5724 4521 286875 270792 16384 8 7971 13158 199911 242880 16384 16 10927 15896 486431 412945 16384 32 14144 15287 162296 175797 16384 64 13815 36225 816176 444180 16384 128 34951 22048 797544 332677 16384 256 27927 36404 469049 470762 16384 512 39423 55880 506725 969931 32768 4 4738 6208 447277 410503 32768 8