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: Thu Sep 3 14:53:15 2026 Auto Mode Machine = Linux oleg249-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-oleg249-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 2313 10140 507625 576282 64 8 2506 13637 695778 603489 64 16 2146 14417 1066042 695778 64 32 3384 48048 627470 647135 64 64 2888 46889 1492919 603489 128 4 2968 9925 225784 316961 128 8 3957 18233 244721 239695 128 16 5642 33925 1009524 876086 128 32 3892 35715 1085013 780556 128 64 7536 79704 1278855 1349580 128 128 8887 89645 415597 1684006 256 4 5992 8812 320442 226920 256 8 10009 16772 973645 225537 256 16 11617 27826 661657 920240 256 32 13992 30836 1173737 425951 256 64 9796 90981 1243036 1089202 256 128 12705 51864 1619994 1306564 256 256 12628 77248 1267990 2114473 512 4 7129 9437 643189 720195 512 8 4947 9112 381855 487642 512 16 14198 27322 1089094 810124 512 32 20715 37552 1122687 554789 512 64 17299 58506 1368865 636705 512 128 23949 42876 1193838 601568 512 256 21206 44322 1230786 1533034 512 512 22368 109354 1672748 2169601 1024 4 6209 11380 326419 242656 1024 8 8891 14375 483896 310491 1024 16 9259 9564 438763 242765 1024 32 10959 24394 170952 651462 1024 64 16965 26800 317609 984676 1024 128 23085 43865 375243 1175799 1024 256 11237 32877 492101 379119 1024 512 11424 35126 1390944 492779 2048 4 4170 4192 238802 233766 2048 8 8833 7657 168698 140581 2048 16 6408 19730 280233 263779 2048 32 11897 28652 459212 517565 2048 64 9945 21801 874845 1213986 2048 128 32965 55968 1028142 477967 2048 256 40118 57273 730697 666464 2048 512 42574 73119 1543340 361334 4096 4 4344 4329 151316 207770 4096 8 6162 6590 382090 259982 4096 16 13109 14951 1577755 321180 4096 32 20950 28093 481433 409934 4096 64 38326 35096 710475 807749 4096 128 43099 37064 638519 421190 4096 256 24763 63625 582234 356852 4096 512 20030 25944 228763 568572 8192 4 1584 3573 171982 113750 8192 8 6296 7388 232714 204594 8192 16 16543 13597 512061 188916 8192 32 6398 13349 446260 280797 8192 64 13318 25541 479236 456378 8192 128 20073 28966 1030839 380174 8192 256 19240 19319 460303 438990 8192 512 36010 42036 560793 419369 16384 4 3242 4171 195261 153504 16384 8 6913 10621 318878 223638 16384 16 12450 12586 466873 304989 16384 32 16099 18813 637360 495283 16384 64 17195 35696 975480 664239 16384 128 36180 30142 825471 552057 16384 256 25674 39528 777265 907345 16384 512 32557 42152 1244809 711854 32768 4 5972 7337 258172 263857 32768 8 8970 11155 466687 572746 32768 16