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 17 02:50:46 2026 Auto Mode Machine = Linux oleg310-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-oleg310-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 3961 9636 441646 471099 64 8 4342 21439 718114 673098 64 16 7902 36095 659861 659861 64 32 4311 15144 1210227 1049372 64 64 6687 70644 1638743 1183548 128 4 4940 12904 561694 528517 128 8 9976 19390 627328 652488 128 16 5852 39801 962469 889145 128 32 10236 16913 1229084 488594 128 64 11721 83823 1133103 1172704 128 128 14948 66635 1471662 291649 256 4 3590 7567 545931 549564 256 8 5364 9739 464661 810490 256 16 12484 39719 1202660 588414 256 32 5988 50304 1422540 886067 256 64 12812 20780 1052888 1254656 256 128 7415 75473 1479379 1600674 256 256 12390 85619 1694118 1280084 512 4 4233 8916 251232 166836 512 8 11350 13711 176925 626672 512 16 8571 14194 1160923 1038532 512 32 18806 28434 791318 1166599 512 64 18847 46524 1251589 1098566 512 128 11402 49908 1462061 324697 512 256 32146 88798 1216149 334404 512 512 22187 81218 1689859 2114069 1024 4 4949 5615 271407 187579 1024 8 12467 12702 141009 540056 1024 16 23203 32884 705735 750762 1024 32 28687 40692 443658 514564 1024 64 25482 55089 471259 278120 1024 128 17332 75439 1189476 1347311 1024 256 19488 68504 310132 258720 1024 512 58507 87957 1197769 918354 2048 4 6507 7049 417944 403874 2048 8 10914 14888 597277 218964 2048 16 22300 26042 727540 441192 2048 32 20275 49341 725206 563392 2048 64 21896 59083 652046 1057899 2048 128 26240 55206 1310279 635829 2048 256 29850 63198 355311 922973 2048 512 47196 42435 565618 506696 4096 4 7464 7065 447546 399338 4096 8 11262 11599 639303 262750 4096 16 20086 23566 576586 764031 4096 32 28383 20150 847350 789523 4096 64 24643 40139 797512 688742 4096 128 31667 36353 1446871 592331 4096 256 37561 49345 647470 1111835 4096 512 34343 69094 1536412 947290 8192 4 2152 6282 130931 491360 8192 8 11480 13213 312600 377339 8192 16 14088 21095 634941 580628 8192 32 28836 44400 600980 567659 8192 64 27027 40162 752598 641054 8192 128 34564 52103 1013119 543634 8192 256 34770 67975 1045964 627978 8192 512 44407 68988 1534409 838578 16384 4 6676 7928 194729 330609 16384 8 12274 14833 501039 462627 16384 16 18155 26239 1089940 696748 16384 32 23659 41156 603905 563913 16384 64 36898 50217 1157969 781117 16384 128 37160 49757 1235055 634301 16384 256 49124 63297 1015241 871855 16384 512 48634 56818 826096 839129 32768 4 7218 8459 321658 386164 32768 8 12000 12249 310888 416106 32768 16 17916 17620 383812 615835 32768 32 28287 37249 714336 376380 32768 64 33291 49799 669826 756573 32768 128 37248 58874 861498 595714 32768 256 47635 55131 619234 838610 32768 512 41496 55601 1027083 704216 65536 4