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: Mon May 18 13:42:20 2026 Auto Mode Machine = Linux oleg232-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-oleg232-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 3199 9742 647135 474430 64 8 5184 15767 866463 789967 64 16 6537 42610 186568 1336792 64 32 2732 31130 1255511 181276 64 64 1248 61247 1255511 1734015 128 4 2740 3396 710329 554157 128 8 4443 24625 831319 809997 128 16 5240 30404 1266785 914904 128 32 5343 74764 1281909 445978 128 64 13500 65433 1243315 1155043 128 128 10850 19262 378663 1827299 256 4 8111 6496 371048 528727 256 8 6668 23963 944525 828628 256 16 20291 31253 1163562 987979 256 32 6386 10057 1362952 1128110 256 64 8751 80125 1112909 1267990 256 128 32092 56436 1325925 1347557 256 256 15680 83547 1422540 1897721 512 4 6424 13816 636705 554789 512 8 10368 17153 909640 744153 512 16 16140 30353 996139 915847 512 32 22057 49013 1248678 509509 512 64 32294 79652 1398278 1289930 512 128 15040 87264 1479181 1422357 512 256 44801 118137 193348 1667552 512 512 39533 163421 944860 1337324 1024 4 7987 10929 509981 597784 1024 8 8659 14732 697596 876022 1024 16 14060 16540 210777 969561 1024 32 10582 16003 132881 298701 1024 64 28835 56633 925877 144817 1024 128 20832 64674 1137798 726752 1024 256 35670 102234 992182 971534 1024 512 54859 113297 1780809 1349004 2048 4 8934 8668 299804 235593 2048 8 14485 17053 246895 224909 2048 16 23013 40689 284361 864891 2048 32 23349 27632 628387 314248 2048 64 23425 37158 1331606 545537 2048 128 24888 45212 1460673 1302727 2048 256 43064 62864 421823 441373 2048 512 28129 58071 1721151 329687 4096 4 3966 5415 312197 320904 4096 8 8725 10204 712095 674016 4096 16 19093 22857 931117 550693 4096 32 23113 26097 267100 1171663 4096 64 28385 44245 989577 631222 4096 128 36635 66459 1149862 970844 4096 256 32948 56301 1772435 1045461 4096 512 35558 43312 910442 402161 8192 4 6393 6110 375057 313270 8192 8 9592 14725 221866 259503 8192 16 13621 17153 494656 359280 8192 32 23266 31608 839520 714892 8192 64 18093 24619 499939 782061 8192 128 21478 45386 1202406 322569 8192 256 33447 76348 1052823 557853 8192 512 36806 63665 679841 673524 16384 4 6704 6326 248781 330896 16384 8 10460 13758 329564 325233 16384 16 20948 19705 694972 349637 16384 32 28654 28363 797165 681215 16384 64 33710 48887 813433 783433 16384 128 37007 44564 887976 685010 16384 256 28030 33987 956738 1412272 16384 512 38330 68607 1106953 1415851 32768 4 6188 7134 410529 341820 32768 8 14347 11410 721934 438432 32768 16 22483 15283 781250 811247 32768 32