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: Wed Feb 18 02:34:05 2026 Auto Mode Machine = Linux oleg342-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-oleg342-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 1216 6556 137040 138240 64 8 3014 13660 272300 216339 64 16 2367 24575 359444 23914 64 32 2638 15481 591520 495445 64 64 4335 18940 929467 269025 128 4 4301 6861 40712 118519 128 8 2098 6772 41159 44473 128 16 2022 39689 191070 369032 128 32 5182 14394 540217 462100 128 64 3224 31968 757430 627328 128 128 8182 47528 234461 1359835 256 4 4681 6252 59507 45501 256 8 5929 16689 316476 98800 256 16 4355 14368 173301 94288 256 32 17497 22676 444465 301459 256 64 8061 27741 90368 484801 256 128 16230 60517 1076103 563701 256 256 9595 101508 122436 441359 512 4 6559 5115 26491 47197 512 8 4105 12485 61538 213153 512 16 10914 21871 174438 169309 512 32 7054 10540 202615 252472 512 64 14980 29142 775879 109471 512 128 6402 48682 300607 833713 512 256 6810 20905 1224470 1242896 512 512 25524 66841 727268 328220 1024 4 4932 4954 61508 49803 1024 8 5048 3026 90005 56683 1024 16 10836 16694 115057 215170 1024 32 8489 28395 567006 540668 1024 64 20989 19764 826621 203776 1024 128 11859 36034 178208 421951 1024 256 22253 49320 423825 401406 1024 512 25045 39792 1488307 513027 2048 4 3720 11713 95695 66100 2048 8 6797 8423 167884 83167 2048 16 13381 24172 240662 139101 2048 32 7400 22174 244075 211310 2048 64 27206 18984 403552 794716 2048 128 28424 30050 786206 625550 2048 256 35166 42785 699688 1249662 2048 512 27688 59276 594467 397115 4096 4 10071 9285 60362 68288 4096 8 11507 5228 126463 83510 4096 16 11898 19249 392792 368446 4096 32 17968 16306 299526 252463 4096 64 42886 22831 318140 471135 4096 128 50557 63883 1216893 1014111 4096 256 31944 75201 376060 587329 4096 512 16581 15668 462672 485076 8192 4 1182 2535 37078 34856 8192 8 6795 6612 61574 47564 8192 16 12697 10010 177392 123339 8192 32 13032 15069 319825 349935 8192 64 13050 45168 667428 710501 8192 128 30767 25068 226498 573227 8192 256 27642 28747 337217 252341 8192 512 25530 47605 420880 282065 16384 4 3140 3566 40609 33876 16384 8 4223 12674 121235 84306 16384 16 7588 17037 164540 154627 16384 32 21310 32265 205441 150747 16384 64 18707 14420 234741 251296 16384 128 12310 20862 434774 320312 16384 256 18891 31035 437818 404603 16384 512 33071 29294 802940 371039 32768 4