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: Thu Jun 11 20:58:33 2026 Auto Mode Machine = Linux oleg226-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-oleg226-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 3094 3661 695778 335206 64 8 2096 4219 789967 640954 64 16 4274 19024 1101022 681644 64 32 9882 8338 1279447 1460430 64 64 2703 46180 1255511 1492919 128 4 5137 10043 551312 512376 128 8 6337 9562 877518 695603 128 16 6626 26272 927549 267791 128 32 8571 32439 1007629 1175271 128 64 15755 75426 1024942 1391557 128 128 11819 56764 1663139 1975201 256 4 3023 9255 420283 187297 256 8 7077 22069 924200 648079 256 16 13665 37449 1108314 790209 256 32 19591 40289 134321 1008392 256 64 15874 65325 1362952 584252 256 128 9125 67907 113927 260692 256 256 14022 36555 1190657 1231629 512 4 6964 5067 136862 63586 512 8 4487 8700 863551 745445 512 16 9960 24693 670082 575300 512 32 12651 43637 1069035 478942 512 64 23180 58134 84573 947779 512 128 10864 172560 1854787 1333173 512 256 13068 94603 199380 649806 512 512 23272 35602 633699 1402845 1024 4 11924 9742 60710 111668 1024 8 9362 6669 160422 369943 1024 16 30547 18191 737231 217865 1024 32 20664 23809 760735 576520 1024 64 13960 29102 1424152 681761 1024 128 33522 54073 252915 853394 1024 256 23521 117606 1130312 569186 1024 512 41127 56474 1673273 1726407 2048 4 7900 4393 153939 251352 2048 8 7480 8369 380459 212470 2048 16 13627 24934 1120990 993652 2048 32 23686 10391 432790 142427 2048 64 32339 35704 1310279 392488 2048 128 17665 24582 384598 1315294 2048 256 30682 37535 1401796 1454489 2048 512 19858 40497 146431 1365474 4096 4 5527 3692 170866 161693 4096 8 5506 11757 530147 354730 4096 16 11251 14145 272831 144792 4096 32 22083 25310 431798 280896 4096 64 25057 48076 1068878 599524 4096 128 31562 35323 1089622 558498 4096 256 29661 48293 993928 773561 4096 512 32993 56008 1662974 687943 8192 4 5343 4404 215013 168993 8192 8 9434 6980 327863 382928 8192 16 13447 13862 562335 659637 8192 32 24050 32585 503846 502579 8192 64 18571 19374 1024782 940337 8192 128 51727 63542 885336 1206290 8192 256 56700 66724 532190 544176 8192 512 26378 46276 553067 848120 16384 4 8439 6913 184094 223993 16384 8 5642 8228 465296 325726 16384 16 9731 15749 416144 402881 16384 32 15860 25211 863681 671030 16384 64 19800 20164 1003309 929322 16384 128 33102 31909 1122669 426136 16384 256 47781 45632 843413 615524 16384 512 56253 46877 899036 589736 32768 4 6385 7132 407993 230833 32768 8