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: Mon Aug 24 15:27:15 2026 Auto Mode Machine = Linux oleg319-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-oleg319-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 3204 6589 718114 866463 64 8 3915 15656 752329 14062 64 16 5027 15747 1002351 47613 64 32 4045 40531 1255511 1083249 64 64 3086 86374 955947 1879725 128 4 3228 9278 403721 561694 128 8 6022 19282 290230 228183 128 16 7893 52630 1017175 836500 128 32 6239 10652 172749 1000121 128 64 4907 64942 144794 236215 128 128 7786 38106 1471662 1561553 256 4 5223 7837 514045 45992 256 8 9340 10942 522297 180557 256 16 8497 17009 193508 714967 256 32 12800 25038 807442 930608 256 64 8206 58486 126982 315268 256 128 31750 55796 1274008 805021 256 256 23677 123977 1662639 1224606 512 4 6546 19196 851903 338837 512 8 3465 9920 173200 492225 512 16 15800 15957 791318 135378 512 32 7436 23676 1011625 1007827 512 64 37383 22510 722133 300103 512 128 13611 75594 1467055 1177473 512 256 20515 38280 764281 223677 512 512 33779 85749 1410215 1679288 1024 4 2791 2945 393823 572677 1024 8 26354 12854 208596 254218 1024 16 9913 27523 1117955 591283 1024 32 9011 23756 916786 243343 1024 64 13699 20463 184437 1155864 1024 128 26094 67417 1367037 809484 1024 256 14742 45480 976172 1412443 1024 512 26962 60951 145889 1184882 2048 4 5877 6303 180264 256800 2048 8 6124 5647 139300 260492 2048 16 14352 10790 473958 100682 2048 32 6398 17879 600786 274493 2048 64 34145 44155 1078351 495302 2048 128 21461 44543 1451540 684467 2048 256 28055 54489 315171 445586 2048 512 36509 93367 1633127 253811 4096 4 4532 1513 97945 180169 4096 8 10689 14887 670700 265335 4096 16 9889 16541 529951 114547 4096 32 38434 67355 363442 796884 4096 64 32412 26917 961983 467049 4096 128 20873 46457 397444 503501 4096 256 34659 40150 774572 416382 4096 512 26132 49767 217398 414664 8192 4 4945 5982 502145 411248 8192 8 19167 9769 198579 297361 8192 16 15117 16039 481574 389258 8192 32 19994 19772 549722 445895 8192 64 22661 26041 320891 590162 8192 128 31247 44726 592074 781084 8192 256 30640 63167 836414 540011 8192 512 30836 53881 542192 895605 16384 4 5653 6399 418580 379257 16384 8 10518 10333 607670 276341 16384 16 17137 18301 609572 639728 16384 32 19357 21258 399725 366303 16384 64 23529 32071 641400 857345 16384 128 36730 41938 378294 682012 16384 256 30776 47649 799883 426577 16384 512 33604 49834 556046 469469 32768 4 6036 6818 223747 200034 32768 8 10864 13661 589353 300309 32768 16