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: Sun Sep 13 22:09:42 2026 Auto Mode Machine = Linux oleg147-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-oleg147-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 2507 12764 1105556 1066042 64 8 6079 21039 1460430 727850 64 16 4849 22137 1143223 866463 64 32 6136 52677 1249666 866463 64 64 2923 10761 1452528 1690338 128 4 5689 9815 384356 334123 128 8 4772 13840 927549 336005 128 16 5596 22358 723735 786271 128 32 7264 12069 1206978 1032829 128 64 2799 22558 275345 1111981 128 128 4816 21034 1421023 1663139 256 4 8003 4571 508929 598249 256 8 3983 10251 580461 358056 256 16 8725 26165 74354 600928 256 32 10916 55149 1019886 907792 256 64 14672 72399 1300235 1243036 256 128 11339 15721 1184092 1254656 256 256 9285 45894 1561112 2371308 512 4 7180 5107 279191 471062 512 8 14822 8809 162702 686358 512 16 12664 30151 1103080 867738 512 32 19444 48613 1187895 1132755 512 64 16950 54042 1316016 1255246 512 128 12207 36477 176735 544106 512 256 20387 70347 1689859 260275 512 512 28463 89278 1674052 536762 1024 4 7794 14692 245037 383520 1024 8 14385 16986 558672 746327 1024 16 20223 31066 482753 892775 1024 32 24138 39567 925877 493969 1024 64 23014 42882 1609925 1312720 1024 128 22449 75987 1283303 896689 1024 256 29056 47311 1055843 1512415 1024 512 29432 93996 381239 847667 2048 4 8646 8256 468529 164827 2048 8 14977 14521 393405 324101 2048 16 26892 32850 563873 944695 2048 32 16465 18859 1199074 488319 2048 64 20858 43605 697302 242716 2048 128 47296 66085 1414259 1335955 2048 256 40028 66941 1681397 1258081 2048 512 55785 96353 666051 1013345 4096 4 8121 6363 606552 389020 4096 8 12933 13749 319056 451000 4096 16 16124 23437 459344 381522 4096 32 26855 33468 654102 785587 4096 64 31374 52327 786631 466301 4096 128 57522 56901 958387 484338 4096 256 70467 55751 1815707 1050769 4096 512 40473 62218 2360908 1178414 8192 4 8098 9130 683017 360169 8192 8 17745 13253 796658 709387 8192 16 26217 34133 392186 673907 8192 32 33458 35655 966388 644130 8192 64 35681 48425 458546 408661 8192 128 41332 46513 739351 641916 8192 256 59171 61888 466864 890245 8192 512 41409 57289 998661 843146 16384 4 4341 9786 388208 359124 16384 8 14289 13927 333116 356157 16384 16 17778 20506 515398 776492 16384 32 25132 41777 1033705 696063 16384 64 37043 46849 959651 697491 16384 128 40288 43270 868308 788792 16384 256 36615 46736 1011788 927803 16384 512 54592 61422 2258294 1704910 32768 4 7852 7792 399731 440820 32768 8 12830 15959 743223 527089 32768 16 17543 19617 743947 608142 32768 32 27138 31990 846675 821007 32768 64 33494 34484 568258 768838 32768 128 40309 49904 1381104 1034146 32768 256 45042 58488 1290181 1013331 32768 512 45194 55525 735121 896771 65536 4 7298 7944 329022 309748 65536 8