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: Fri Aug 14 19:06:46 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 1844 3856 233664 640954 64 8 3033 15451 789967 710511 64 16 4070 27728 1049372 844652 64 32 2692 24332 1255511 1232453 64 64 1882 67721 1599680 1255511 128 4 2006 6325 280086 246632 128 8 4039 19984 848397 656477 128 16 7921 39913 1175271 805138 128 32 6796 20678 171370 1266785 128 64 4295 73234 465708 1291158 128 128 8641 39677 1778862 934004 256 4 5009 3404 51694 368375 256 8 7879 15283 1049800 815414 256 16 14893 22168 1202660 924200 256 32 15267 66457 1842366 1985448 256 64 9692 60622 285432 98123 256 128 6470 97747 1707589 1080434 256 256 17859 78433 1729594 1361224 512 4 6561 8007 602243 543418 512 8 4696 4259 185035 133129 512 16 14384 26501 899731 1021732 512 32 13588 19021 1261144 854615 512 64 18358 39342 616950 1329871 512 128 16236 58095 1585086 1303238 512 256 17737 51348 1718254 1537424 512 512 18788 75448 710192 1551867 1024 4 5787 7879 198796 199925 1024 8 6213 8852 899883 794363 1024 16 21843 29859 939446 973516 1024 32 23276 22707 806899 767533 1024 64 21546 38646 579476 393246 1024 128 22586 55618 1501313 846998 1024 256 21959 49825 869989 1208894 1024 512 23741 66299 1577984 1065800 2048 4 4818 4480 127204 147507 2048 8 6659 6771 952024 814303 2048 16 7299 14938 241311 451702 2048 32 12414 10762 228621 438534 2048 64 13401 17084 530707 1208861 2048 128 33077 45531 223848 496705 2048 256 23194 55052 574623 962802 2048 512 23272 40943 1734007 773742 4096 4 3065 10437 273100 233721 4096 8 22526 27877 211713 207519 4096 16 11272 17682 748551 512437 4096 32 30678 25663 628337 486574 4096 64 25475 31259 407040 661481 4096 128 30600 31599 777376 511050 4096 256 40282 28498 1409479 1421256 4096 512 49000 71376 1222696 872260 8192 4 7263 4499 356496 329179 8192 8 5570 5245 256240 151074 8192 16 7511 13883 293746 243781 8192 32 19165 22060 592288 467525 8192 64 14967 39448 625965 351180 8192 128 23898 35622 431087 628610 8192 256 26976 47532 525098 333713 8192 512 26155 42041 697138 598697 16384 4 3564 5693 426210 167884 16384 8 7571 10108 469011 376211 16384 16 30064 25858 1115706 1006940 16384 32 19368 21461 478811 429902 16384 64 22617 37658 831383 683348 16384 128 24292 34442 665391 684458 16384 256 33009 40244 533454 484619 16384 512 29124 40502 790807 680035 32768 4 5177 6232 261668 243974 32768 8 10779 10750 389033 234163 32768 16 15528 21043 347188 373004 32768 32