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 Aug 8 08:09:21 2026 Auto Mode Machine = Linux oleg435-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-oleg435-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 1279 2369 639427 147184 64 8 1757 14282 645579 507625 64 16 2415 12708 842003 842003 64 32 2872 40306 1087638 1033216 64 64 2177 43006 1124074 1526887 128 4 2723 8791 581781 477301 128 8 3300 7519 735635 621518 128 16 5067 6365 948860 901083 128 32 2908 31730 1185654 895074 128 64 3523 38209 1254941 1085013 128 128 4901 39581 335166 1997245 256 4 2035 2137 246848 562520 256 8 6341 12148 719277 122366 256 16 6258 32846 972763 977189 256 32 4968 14639 1400278 389064 256 64 4902 16190 1327564 1123389 256 128 5406 19288 1398455 301121 256 256 14642 56572 794889 1938842 512 4 7470 5578 582478 319195 512 8 11014 14020 97974 499089 512 16 13936 18407 613250 257683 512 32 7702 11419 525082 454705 512 64 14817 30288 356026 168472 512 128 11066 60959 1383861 561315 512 256 16685 33424 1510391 1289930 512 512 18483 51927 332901 382059 1024 4 4150 7102 576907 595381 1024 8 7742 5491 889631 180288 1024 16 11352 19931 320907 183735 1024 32 25104 17070 213416 200196 1024 64 23784 46632 641633 316836 1024 128 20895 37195 603750 716567 1024 256 19266 77763 249275 780504 1024 512 20173 59352 375506 362328 2048 4 3900 6775 394906 302113 2048 8 5948 12901 281472 244652 2048 16 8689 7052 983639 189506 2048 32 9597 16751 186369 295737 2048 64 29103 41664 543535 411813 2048 128 28015 48284 391433 560049 2048 256 35031 56850 889982 990330 2048 512 21020 40732 186738 305671 4096 4 6059 5774 125513 301064 4096 8 7750 10538 110452 417404 4096 16 22314 30305 473368 469192 4096 32 28951 36925 807218 368186 4096 64 22414 23482 308947 577808 4096 128 24631 30285 500173 712095 4096 256 25784 53250 509383 231569 4096 512 30805 27493 431245 301799 8192 4 5555 6834 259964 290795 8192 8 9316 9831 344825 358718 8192 16 18311 17815 453678 284080 8192 32 11631 15883 417003 247843 8192 64 15069 29409 829148 431385 8192 128 15343 31568 395768 356592 8192 256 21980 42324 731356 900605 8192 512 34920 47082 863769 980395 16384 4 5548 5903 159619 399181 16384 8 12554 11260 499342 424401 16384 16 15952 12732 486362 378970 16384 32 18401 27153 601800 730352 16384 64 13420 16745 320550 384690 16384 128 27219 35297 837115 392037 16384 256 23938 34414 434255 730616 16384 512 26384 40484 545332 564186 32768 4 6227 6278 396232 406087 32768 8 9398 7702 296647 282741 32768 16