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 Aug 24 10:52:46 2026 Auto Mode Machine = Linux oleg314-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-oleg314-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 4184 10503 576282 576282 64 8 6317 18762 369844 216863 64 16 4420 15924 983980 771797 64 32 8192 51614 1452528 1304314 64 64 3253 84551 1210227 1599680 128 4 5248 10018 49079 526961 128 8 2994 7499 785122 589446 128 16 3064 15399 637004 40251 128 32 4399 17105 1440082 710329 128 64 10282 40842 1102844 1231904 128 128 3050 62377 1196221 1997245 256 4 4310 12487 430218 377041 256 8 6391 10596 213858 625794 256 16 4887 14897 914752 725106 256 32 15477 59507 808050 591005 256 64 17948 71808 1325925 795478 256 128 17950 29435 1430119 1062263 256 256 7781 120471 1686137 1514860 512 4 7191 12004 219269 128155 512 8 5360 14876 533960 537165 512 16 12257 20607 895230 835334 512 32 7332 50854 175997 964378 512 64 13744 44696 551654 475337 512 128 20499 86869 975328 1227269 512 256 40692 110844 836636 1376763 512 512 18894 38876 1471074 239359 1024 4 4410 8096 649001 235124 1024 8 15810 17450 905384 297851 1024 16 20798 25112 1045817 375374 1024 32 21176 37890 1328146 213862 1024 64 33396 29610 1133893 621755 1024 128 29888 43888 1179674 879610 1024 256 13884 40048 994941 1142945 1024 512 43585 40342 955115 1035479 2048 4 8038 7098 195979 184006 2048 8 6683 7618 268941 439769 2048 16 19161 15996 1005870 866724 2048 32 12277 29894 308061 885030 2048 64 25943 41738 376325 410592 2048 128 18043 36112 852615 318549 2048 256 31998 41132 1620190 253376 2048 512 34893 40452 1652925 1559876 4096 4 6248 7240 226224 265441 4096 8 10382 7692 529951 213590 4096 16 18720 21404 1217928 445515 4096 32 18098 40007 660845 447208 4096 64 32222 28325 469937 781087 4096 128 23208 35174 868336 709272 4096 256 31530 51516 1015850 456428 4096 512 37403 55710 1568822 824140 8192 4 5823 7236 259964 249459 8192 8 10460 12670 322239 192825 8192 16 15115 17054 661389 438777 8192 32 20755 26850 526813 760056 8192 64 29151 32297 509646 493881 8192 128 27431 53662 732932 564813 8192 256 27104 60650 853068 481230 8192 512 45905 52264 609152 684323 16384 4 5234 6994 212726 226705 16384 8 10783 11785 353728 452596 16384 16 16968 29945 766720 398919 16384 32 23823 44713 563044 499789 16384 64 33481 58570 1352138 464858 16384 128 33066 53266 1006439 513346 16384 256 36135 46252 1110926 596063 16384 512 35731 47033 770028 565942 32768 4 7525 9790 221824 177709 32768 8 10512 10762 453015 665029 32768 16 14613 17491 648077 196433 32768 32 31627 25200 479078 223611 32768 64