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 Feb 7 01:55:02 2026 Auto Mode Machine = Linux oleg341-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-oleg341-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 2311 11922 78909 331481 64 8 3822 19214 397208 395452 64 16 5960 11078 211232 264519 64 32 7977 36364 763021 752329 64 64 6636 68082 1087638 1204796 128 4 4796 16620 213314 43805 128 8 5820 14768 236215 228571 128 16 6346 25891 962469 332467 128 32 7076 37309 1579934 425478 128 64 8762 60269 902598 1102844 128 128 5892 52180 1243315 1705404 256 4 4963 9770 328581 270613 256 8 9257 22661 264481 429530 256 16 12323 21027 691484 812944 256 32 15376 44327 1007446 852984 256 64 11938 99183 1306564 1201314 256 128 10025 29513 1224606 1137672 256 256 13339 35659 1652404 1897721 512 4 8431 8852 79428 113348 512 8 10681 22030 443254 444079 512 16 11073 39755 488086 288803 512 32 25486 77365 494720 637461 512 64 17595 33479 999850 730484 512 128 12621 71880 1051242 836636 512 256 22405 110604 818149 1135150 512 512 33715 69029 1026126 1326585 1024 4 8024 9823 197680 117109 1024 8 14828 22733 282641 430624 1024 16 15189 19031 444852 353588 1024 32 19052 54791 885048 698050 1024 64 22171 94893 657244 402233 1024 128 34673 74374 1977602 1356245 1024 256 32497 74138 731954 1226150 1024 512 44267 116322 1387798 1825466 2048 4 11035 16365 204718 182029 2048 8 21789 21836 380324 356727 2048 16 22624 44082 255487 267534 2048 32 30106 31034 709864 799078 2048 64 42908 47048 1569280 574623 2048 128 42783 84894 1006459 560305 2048 256 32502 46598 412822 1458688 2048 512 36193 65169 1812296 916376 4096 4 13118 8332 124430 159869 4096 8 13763 22059 281665 326819 4096 16 21086 43225 434957 531871 4096 32 49648 31153 757262 473198 4096 64 35743 59709 497091 1045461 4096 128 45480 59685 1168316 829792 4096 256 41035 64902 904165 1077864 4096 512 50431 55706 1399376 945777 8192 4 11810 12543 141363 142755 8192 8 17295 19185 280788 255999 8192 16 20588 19189 517888 419497 8192 32 35582 42987 510115 567743 8192 64 46363 45938 567396 824987 8192 128 42596 49053 701780 519297 8192 256 35360 70374 824888 573984 8192 512 40899 80344 533372 1499521 16384 4 11279 11245 163094 155199 16384 8 4394 21772 263273 195665 16384 16 19190 25453 346779 415562 16384 32 34056 31963 389929 352254 16384 64 47028 53485 461716 461691 16384 128 39981 51664 654709 829396 16384 256 51986 53540 873207 914384 16384 512 49497 47632 1333224 915200 32768 4 9661 11124 154476 146104 32768 8 17229 18827 346025 245107 32768 16 22046 27171 312070 362915 32768 32 35968 41986 763448 691423 32768 64 37182 47223 855849 878497 32768 128 47861 59545 763499 623747 32768 256 51532 64558 616390 760083 32768 512 48959 68577 1035947 835409 65536 4 11998 14526 196149 152175 65536 8 16714 21796 279144 368575 65536 16 24764 29450 454495 560715 65536 32