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 Aug 26 04:10:13 2026 Auto Mode Machine = Linux oleg127-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-oleg127-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 6190 7569 454354 695778 64 8 5451 33614 809014 192178 64 16 11345 34005 1029254 863676 64 32 9501 56337 1183548 1066042 64 64 14109 102385 1183548 2222043 128 4 6481 10928 603357 339618 128 8 4434 20401 780556 1000121 128 16 5644 31784 1102844 948860 128 32 14567 75788 1436229 969421 128 64 13601 74155 1281909 460514 128 128 10746 57685 1332828 1967960 256 4 15644 14444 370920 275898 256 8 12341 26465 937924 769263 256 16 18956 17329 492360 842278 256 32 22745 55980 1391207 1293967 256 64 32656 72399 1430119 1219045 256 128 29317 77387 992545 1591186 256 256 16734 149363 977189 1023775 512 4 8993 12100 829847 725058 512 8 17224 29841 781526 724325 512 16 31531 17320 429599 343388 512 32 46234 67467 1091863 519870 512 64 40619 54294 811349 1889050 512 128 14184 85445 1467055 1455126 512 256 33934 153712 1764853 378157 512 512 52047 87147 369949 2244430 1024 4 4483 8543 583808 469507 1024 8 13068 16504 766985 844168 1024 16 27798 34016 1149368 982873 1024 32 36727 60217 1309518 926676 1024 64 30257 59472 966071 646072 1024 128 43923 72459 354815 1381993 1024 256 34744 57274 277205 1544504 1024 512 42814 57316 1220228 605965 2048 4 8825 11856 296687 389870 2048 8 15397 21412 552023 498059 2048 16 21581 30671 1146730 939837 2048 32 41918 51297 1067230 834557 2048 64 31213 70262 1591080 216557 2048 128 43075 73571 628203 1006813 2048 256 34023 90435 1469167 966485 2048 512 51037 120336 1089843 950865 4096 4 9524 7718 253182 239825 4096 8 12948 9762 288452 360756 4096 16 21859 27654 407204 433071 4096 32 17032 25245 1052378 398939 4096 64 32518 42306 1469645 877293 4096 128 41618 38680 747574 531805 4096 256 37765 51032 924802 574562 4096 512 39381 74851 1190664 844684 8192 4 9257 9836 356126 276802 8192 8 20015 23028 578701 510592 8192 16 25073 25879 709138 610527 8192 32 31182 39585 4646 1073245 8192 64 53221 47585 732807 792031 8192 128 33023 81824 749430 646615 8192 256 46318 65349 1401534 772966 8192 512 50549 74324 1391318 512764 16384 4 9845 10202 366318 315314 16384 8 13683 15744 739413 445701 16384 16 21885 25095 757082 281095 16384 32 28491 45216 455226 598086 16384 64 47110 42327 790080 787689 16384 128 30568 59006 404995 950124 16384 256 35009 50791 1081739 548492 16384 512 42672 55908 1075425 775686 32768 4 6649 8613 376471 260765 32768 8 11226 23143 669337 813908 32768 16 26985 24274 342367 431396 32768 32 23430 37622 1020683 596086 32768 64 34206 56337 1189146 483281 32768 128 40285 51319 1695797 972689 32768 256 49321 77323 729278 694147 32768 512 58859 60577 1024961 613219 65536 4 10149 12021 482219 339450 65536 8