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: Sun Nov 16 22:42:57 2025 Auto Mode Machine = Linux oleg126-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-oleg126-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 4646 18084 22439 107900 64 8 4004 21045 46275 385237 64 16 4319 42247 532815 284418 64 32 4800 59155 842003 659861 64 64 4773 47029 1188789 1226821 128 4 6501 16028 239695 235696 128 8 3674 21290 524900 336848 128 16 6280 29998 526961 540217 128 32 15007 75788 748976 757430 128 64 16229 94174 179507 790905 128 128 12633 114378 1451764 1684006 256 4 11915 18162 252954 102978 256 8 10487 31659 418971 449865 256 16 12680 34187 532397 714967 256 32 9153 80473 735537 682691 256 64 10644 98275 1016025 1094754 256 128 15171 77482 1266495 1361224 256 256 12654 132156 1158540 995306 512 4 4727 6472 252710 139466 512 8 15306 30601 390820 150639 512 16 9852 17705 850554 622133 512 32 16837 26957 86736 713258 512 64 20721 82235 1024169 915847 512 128 15483 29894 1179413 1069035 512 256 34580 130010 1040545 1207261 512 512 44963 144389 1650887 1842059 1024 4 8619 13546 109367 224952 1024 8 18055 30092 472763 447961 1024 16 14658 26433 592588 136914 1024 32 27638 25402 726261 774592 1024 64 18105 74613 425420 905384 1024 128 19953 32202 604515 1122630 1024 256 51402 45771 1229309 1296474 1024 512 40020 80788 955115 1400469 2048 4 8086 8418 176919 192173 2048 8 7778 23246 234679 252371 2048 16 13342 20064 417538 479863 2048 32 30159 17531 166301 771379 2048 64 20249 47699 1087635 939015 2048 128 26607 67573 1174964 1032344 2048 256 45200 54735 752393 1217600 2048 512 34473 66124 1407538 458476 4096 4 10527 9557 221191 204983 4096 8 12515 14313 238292 318754 4096 16 21518 22237 547446 114856 4096 32 31725 28291 342332 464712 4096 64 24321 41412 292698 219391 4096 128 34449 49592 1278377 815959 4096 256 29609 52491 1410520 329451 4096 512 63521 64192 473407 254981 8192 4 5920 9259 120068 159368 8192 8 13778 15664 225663 243417 8192 16 23506 25721 517529 469377 8192 32 23778 28510 811887 860783 8192 64 37578 59876 325142 977328 8192 128 24302 45233 1069870 986730 8192 256 34064 70200 819869 899921 8192 512 41264 61241 287358 283361 16384 4 6095 6651 71487 132161 16384 8 12158 10489 457742 211576 16384 16 15543 22948 292629 223705 16384 32 24085 23784 639948 622493 16384 64 31311 27685 635480 375633 16384 128 22650 39435 363393 550558 16384 256 41273 53559 548970 551778 16384 512 30300 87078 992614 1215525 32768 4 8490 8750 78294 98273 32768 8 14032 13736 167283 333778 32768 16 19632 25735 406621 417501 32768 32 33907 49466 659714 433794 32768 64 36526 56211 963930 635371 32768 128 51856 68454 1135570 1029306 32768 256 50191 70716