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: Fri Jan 30 01:27:43 2026 Auto Mode Machine = Linux oleg219-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-oleg219-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 1864 3211 152363 120981 64 8 3021 6504 101113 108117 64 16 4214 40946 132835 367817 64 32 3275 31356 150653 633392 64 64 2341 68446 293434 821391 128 4 3901 10545 115312 130219 128 8 5650 26369 439767 172084 128 16 4186 18176 425478 403721 128 32 6413 60181 630273 192164 128 64 5121 71072 584950 551878 128 128 11134 72395 1185654 1336145 256 4 2661 7569 58327 134878 256 8 4109 5005 67404 121507 256 16 4644 16906 135662 183897 256 32 6147 28568 430218 329489 256 64 11884 32479 831194 332550 256 128 10765 61186 662883 1201314 256 256 12972 98836 937924 1532153 512 4 9713 5574 47149 43478 512 8 11433 14077 137634 228874 512 16 11979 18730 165856 138862 512 32 11758 28946 271496 66562 512 64 10594 38041 817837 302087 512 128 14042 42989 602243 625212 512 256 9669 44708 1355045 1279935 512 512 22702 129134 1585086 1889050 1024 4 4466 3411 54378 40920 1024 8 9674 11870 165217 52388 1024 16 3824 9138 88774 127221 1024 32 24152 26965 225448 581831 1024 64 26195 50950 957030 823136 1024 128 12801 63820 544990 1080004 1024 256 29988 58420 622837 624740 1024 512 18081 77370 1027060 894262 2048 4 5947 3670 36463 33598 2048 8 5154 7918 91887 87544 2048 16 10254 12722 157489 281786 2048 32 27826 43108 223778 301795 2048 64 20289 32028 438154 326479 2048 128 18558 18625 421823 493396 2048 256 12843 33343 1202599 518502 2048 512 20007 57602 1288076 618345 4096 4 4871 3963 53720 67924 4096 8 7483 6902 64033 72002 4096 16 9065 18842 132831 89667 4096 32 13938 25519 312623 220569 4096 64 30869 21701 268923 220937 4096 128 14496 33372 473251 297802 4096 256 39274 1682 732748 632990 4096 512 29349 79603 1031216 665143 8192 4 4640 5640 40508 64200 8192 8 13381 11180 165598 166897 8192 16 21768 21743 272532 240906 8192 32 23567 37642 353666 446063 8192 64 22436 22813 381127 336745 8192 128 30510 54592 734766 581690 8192 256 37935 59412 680743 478949 8192 512 29844 35038 664498 415711 16384 4 5258 5399 53758 46171 16384 8 7454 12618 123224 110122 16384 16 18335 17955 109478 167539 16384 32 17424 16612 191227 306426 16384 64 33227 24296 322837 474320 16384 128 42843 42375 689768 710868 16384 256 33717 48567 557906 586419 16384 512 25400 31730 293651 281642 32768 4 5106 5228 57864 32673 32768 8