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 Nov 17 13:00:32 2025 Auto Mode Machine = Linux oleg219-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-oleg219-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 1338 3739 295047 271200 64 8 2464 25038 451299 295047 64 16 3702 18620 36403 83215 64 32 2523 52895 780776 703068 64 64 3311 81324 1279447 1279447 128 4 3272 5350 248573 257516 128 8 4888 19082 498114 456986 128 16 3188 48873 707520 597981 128 32 8407 66776 881842 351630 128 64 6858 81954 1093856 1206978 128 128 10557 100466 948860 56740 256 4 2772 7136 40424 251945 256 8 6471 27646 452329 469743 256 16 11427 40973 629094 608074 256 32 5366 25741 768712 717355 256 64 13415 41144 1248819 1008392 256 128 8053 47858 1430119 762164 256 256 19013 34958 1422540 1829808 512 4 7845 10579 126012 279918 512 8 6859 9566 570107 364920 512 16 11716 19608 399026 168697 512 32 19537 21173 873740 855978 512 64 18643 87760 1282994 219359 512 128 27512 107294 1430887 1242896 512 256 22836 47140 912345 1640796 512 512 9155 37299 1446306 2198475 1024 4 5947 15980 242368 193573 1024 8 20934 18000 361596 112219 1024 16 26978 42345 660174 557150 1024 32 25733 56496 798201 381239 1024 64 36229 27068 419684 331918 1024 128 19363 38001 1067654 244911 1024 256 19385 90092 528884 321099 1024 512 41943 99015 1408737 1349428 2048 4 5303 4889 105982 179646 2048 8 6764 12982 302421 185504 2048 16 32027 37340 503814 445887 2048 32 36751 61636 911031 909776 2048 64 34711 82437 1217600 548008 2048 128 47475 67167 1450560 1271301 2048 256 18054 33386 1116038 1288076 2048 512 32222 77986 1305301 1449336 4096 4 5447 6490 207961 167849 4096 8 13889 10914 223312 202521 4096 16 25683 19622 159476 276031 4096 32 18095 35699 793021 416978 4096 64 17976 44416 819501 785300 4096 128 36995 49311 895493 1206467 4096 256 45593 93730 479739 1102842 4096 512 40712 56982 1576018 1268935 8192 4 5561 5166 190060 211975 8192 8 9706 9857 261659 149926 8192 16 15111 19498 379540 282260 8192 32 31372 38524 796049 716771 8192 64 31278 31916 727008 416876 8192 128 22066 43639 609974 472326 8192 256 41114 62314 771092 945616 8192 512 39197 35920 1436455 862122 16384 4 6822 7885 227732 126927 16384 8 12453 17598 301038 222164 16384 16 23864 19697 227689 331726 16384 32 25560 31070 629617 753876 16384 64 30293 51497 501470 853246 16384 128 53879 51567 1379360 869175 16384 256 39603 49159 1566655 843144 16384 512 27927 47015 1099444 1216428 32768 4 6754 7100 249581 113481 32768 8 10389 12503 434808 213493 32768 16 21842 18987 187693 289115 32768 32 20182 23621 834557 376237 32768 64 30858 34626 254873 260228 32768 128 27856 45517 571536 664194 32768 256 28663 52336 764803 1322090 32768 512