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: Wed Sep 30 00:08:09 2026 Auto Mode Machine = Linux oleg326-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-oleg326-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 2585 9826 743988 248136 64 8 2270 7999 889431 703068 64 16 4192 33614 1045286 780776 64 32 3134 64655 1304314 1183548 64 64 4335 27186 1013707 1638743 128 4 4117 9522 544601 470606 128 8 6272 7542 921183 831319 128 16 3696 8632 1007629 711270 128 32 6081 24261 883293 942199 128 64 7466 47566 1133103 1155043 128 128 5962 43670 396271 1878447 256 4 4540 17199 462061 597916 256 8 13043 24244 965763 306625 256 16 10869 34684 1036624 969251 256 32 6731 55030 1391207 1180188 256 64 13755 51415 652807 1422540 256 128 10602 32364 569985 1230218 256 256 8203 39596 1652404 1970871 512 4 4443 4233 266245 389969 512 8 2787 6161 237479 342675 512 16 11885 30798 873740 1011625 512 32 24219 30224 1541840 1049187 512 64 26779 53797 1492545 753025 512 128 15181 55148 510478 1300082 512 256 5941 125739 2722449 1350783 512 512 12513 43497 1695195 3437042 1024 4 11144 14853 350100 554704 1024 8 7095 9467 803878 618443 1024 16 18555 12520 1009913 404582 1024 32 30549 26597 243993 315370 1024 64 18994 47197 706199 328818 1024 128 23032 31658 262563 345482 1024 256 26311 52043 351159 389643 1024 512 20581 121354 741431 1110727 2048 4 5561 6789 437886 328728 2048 8 17622 6623 827482 155527 2048 16 24177 32621 456843 239809 2048 32 23838 26653 350741 400075 2048 64 36665 54028 525673 451109 2048 128 34812 20827 338188 1260296 2048 256 20778 61431 1262704 496132 2048 512 14226 51404 315808 1350023 4096 4 5109 4400 311767 227226 4096 8 8706 22179 492375 183365 4096 16 35825 25135 621068 291135 4096 32 21142 37760 715475 434770 4096 64 14090 19131 294883 246540 4096 128 24851 32187 492657 245666 4096 256 45604 43466 722912 332062 4096 512 31020 58577 1098119 584651 8192 4 9724 7153 217069 278034 8192 8 12349 13030 508281 409762 8192 16 25801 21151 470611 467315 8192 32 20095 18674 705179 589140 8192 64 22571 40089 899521 810374 8192 128 21027 57801 1079144 493704 8192 256 25001 31915 701665 620976 8192 512 26493 42728 547741 697605 16384 4 5328 5606 189362 167348 16384 8 8900 9429 212796 316018 16384 16 12503 17165 403983 419651 16384 32 18432 21162 840895 501653 16384 64 25340 32429 483402 420964 16384 128 19918 27098 529986 437431 16384 256 29079 43085 815527 422824 16384 512 26480 40821 567921 726499 32768 4 5553 6037 289815 191804 32768 8 9821 8557 266473 262844 32768 16 12920 16468 542176 386625 32768 32