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 10:20:50 2026 Auto Mode Machine = Linux oleg217-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-oleg217-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 2596 5532 450541 457452 64 8 983 9636 780776 516414 64 16 1709 4593 1017549 463774 64 32 911 6242 1279447 818885 64 64 1422 28905 1249666 1304314 128 4 2539 3013 42595 415597 128 8 2299 2715 848397 228183 128 16 4101 12625 955616 747933 128 32 5054 60181 1217930 947186 128 64 7187 35594 864797 1858934 128 128 3901 109502 1076312 2098744 256 4 10058 22959 673696 615393 256 8 13388 12271 853662 1304976 256 16 9367 57868 1924938 1286217 256 32 24474 39777 1561112 1185399 256 64 25388 38752 1340826 1884399 256 128 9866 38045 802614 556687 256 256 6025 154499 958864 1437779 512 4 8511 10754 446387 405429 512 8 11006 15724 802555 861818 512 16 12723 28746 570107 873740 512 32 14868 35444 605982 1091308 512 64 9960 16042 1193838 917804 512 128 7027 13603 133162 263242 512 256 20645 55297 1414860 1069035 512 512 24305 82368 1462061 2141475 1024 4 8149 11793 341553 272543 1024 8 13113 15511 550862 242068 1024 16 14690 31953 109482 282474 1024 32 24015 35806 681761 865605 1024 64 19693 29809 1278338 1158358 1024 128 30836 73079 1521524 822506 1024 256 31049 76417 1170033 1097388 1024 512 32258 75671 652650 1292961 2048 4 8498 6935 164536 128991 2048 8 11460 11770 377865 257031 2048 16 14465 14111 1119092 417092 2048 32 10554 25405 1218291 1065642 2048 64 32822 23157 647475 169772 2048 128 12365 32693 1397008 924961 2048 256 36654 64546 1579088 447350 2048 512 38836 74491 787359 693978 4096 4 7969 6223 163610 291778 4096 8 8737 8038 427830 263443 4096 16 12460 14668 277601 323947 4096 32 16019 16830 629672 1224526 4096 64 19477 24346 1025798 485996 4096 128 32052 54362 793351 485419 4096 256 42321 46780 386300 1290864 4096 512 34511 35571 470477 674704 8192 4 8717 6854 436464 321597 8192 8 2244 7291 488516 240523 8192 16 12330 14276 375796 321038 8192 32 20483 22644 587488 439817 8192 64 22913 23642 338777 454783 8192 128 36052 28357 689223 623953 8192 256 22092 35739 349323 572902 8192 512 31079 37951 633419 821005 16384 4 4918 5812 223632 281992 16384 8 8942 7153 221690 114889 16384 16 11385 12362 510880 612441 16384 32 14004 18646 345668 362204 16384 64 16723 24928 486059 298541 16384 128 18463 24536 876012 375141 16384 256 21783 28238 380810 398901 16384 512 43276 44416 433356 749665 32768 4 4321 4838 124055 150539 32768 8 9080 11212 316950 334216 32768 16