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: Tue Sep 1 10:16:45 2026 Auto Mode Machine = Linux oleg316-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-oleg316-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 3902 11339 571375 361380 64 8 5483 14270 328238 424198 64 16 4299 24568 983980 167897 64 32 5412 23563 1232453 983980 64 64 7234 58600 1066042 2006158 128 4 7858 6733 335166 39789 128 8 5038 11676 819893 757430 128 16 6717 15048 889145 747933 128 32 12082 20231 1133103 554157 128 64 7450 66322 1243315 1007629 128 128 8081 82521 273522 2058509 256 4 5625 10702 430909 633922 256 8 15422 33472 930608 222407 256 16 15485 30035 988889 406442 256 32 14197 32678 1740810 792543 256 64 18172 64208 262798 1028679 256 128 10195 117441 606700 2097948 256 256 13570 82368 1003679 1489641 512 4 9193 9127 366789 147463 512 8 11855 12697 516122 212984 512 16 16178 22363 1010197 595397 512 32 21122 32841 1158418 508905 512 64 34730 79366 1309596 1021732 512 128 33492 81105 1580419 111477 512 256 36278 146537 1546280 703215 512 512 32941 166499 1747618 1770674 1024 4 10563 11948 355049 277743 1024 8 18049 26448 772920 197380 1024 16 25154 46507 852039 345371 1024 32 21439 66605 971534 789544 1024 64 37409 89902 281087 596373 1024 128 34464 87889 436888 496596 1024 256 71299 90611 1434617 1221964 1024 512 43882 88161 686776 1436056 2048 4 12780 12625 339969 509189 2048 8 17807 20559 499275 780774 2048 16 19996 26522 288690 508045 2048 32 26848 35761 1155212 689135 2048 64 35306 71096 887407 902132 2048 128 39719 81988 1101583 403381 2048 256 42612 56963 465054 478953 2048 512 32949 65129 551562 1494992 4096 4 8962 8498 308292 191383 4096 8 16722 14485 781834 616964 4096 16 17148 24019 426142 545846 4096 32 30360 39111 886391 888500 4096 64 44678 40262 652338 878055 4096 128 33363 48314 713218 669159 4096 256 48927 62740 629857 1429653 4096 512 31862 70054 1675953 762336 8192 4 8540 9037 573620 422921 8192 8 13491 18093 557771 425803 8192 16 21717 27229 528279 612759 8192 32 29963 40252 1212719 744929 8192 64 30861 44464 953991 497089 8192 128 42673 59600 884766 876170 8192 256 49672 72002 1226003 665695 8192 512 45834 72099 907096 1301761 16384 4 9975 11945 223017 469120 16384 8 15914 16714 528787 432969 16384 16 23970 34777 924036 589710 16384 32 36378 32334 1086030 989612 16384 64 34026 48091 1078175 668348 16384 128 52794 54160 744726 922213 16384 256 46387 73204 952561 737920 16384 512 61950 71700 1020821 683233 32768 4 10808 13377 668910 436127 32768 8 18977 19317 645344 593881 32768 16 23564 26084 989789 739416 32768 32 28485 40769 1048041 553841 32768 64 42910 59192 763075 869158 32768 128 53956 74161 735220 834046 32768 256 39777 75566 539319 593161 32768 512 55373 84103 908886 1165123 65536 4 11474 14679 378728 629210 65536 8