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: Sun Dec 7 05:36:11 2025 Auto Mode Machine = Linux oleg306-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-oleg306-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 5040 19668 295047 300328 64 8 3537 20362 410573 243411 64 16 8417 47161 63552 385237 64 32 5260 60542 852702 760859 64 64 6511 64314 627470 901377 128 4 4907 16976 229451 220770 128 8 9632 14469 377597 331441 128 16 7701 52460 488594 92694 128 32 10375 76056 876086 711270 128 64 11570 105169 1152564 1142750 128 128 4374 100466 1455701 1684006 256 4 10510 15005 248275 253192 256 8 4632 30206 531080 203947 256 16 20973 45413 549283 570288 256 32 8043 40182 859127 797250 256 64 16908 84882 1163562 944525 256 128 9884 40068 795478 1231629 256 256 20006 129291 1552085 1855098 512 4 12888 8803 239920 196695 512 8 16870 11109 74810 416275 512 16 30782 46381 598217 498973 512 32 17414 80289 710192 628138 512 64 15644 59980 912345 840566 512 128 28915 80542 1103647 863551 512 256 29626 112305 1414860 1176828 512 512 42011 145337 1329871 1862832 1024 4 12652 9518 186011 121269 1024 8 12090 15579 412390 441378 1024 16 25981 29120 634805 569186 1024 32 31830 44494 704230 691865 1024 64 22390 47378 953418 907680 1024 128 40391 105642 1316341 995171 1024 256 49740 83571 1410588 325405 1024 512 54068 98432 1577984 1208894 2048 4 10036 9857 230010 237673 2048 8 14265 21719 357172 297808 2048 16 23508 26105 508797 374064 2048 32 17407 42372 429715 398054 2048 64 31709 50726 1198237 1003871 2048 128 26329 40366 1230683 1101724 2048 256 32865 35838 1213986 755437 2048 512 53008 72770 1223496 1296240 4096 4 7343 7694 83610 111385 4096 8 10558 18789 356978 261809 4096 16 24036 28165 455267 364994 4096 32 27142 40964 700881 397325 4096 64 37228 53416 407156 732748 4096 128 42491 48724 952806 1167998 4096 256 45937 104687 1409941 1091145 4096 512 48262 85616 1434188 1017354 8192 4 11126 11888 142486 153667 8192 8 21187 24151 224561 293706 8192 16 31315 37885 572273 662090 8192 32 44831 54197 594358 588676 8192 64 54094 70685 888495 653316 8192 128 45906 98983 1249544 772184 8192 256 59456 63483 1412422 683003 8192 512 52061 73206 837025 792560 16384 4 11670 10936 223203 210715 16384 8 15663 21019 153441 193164 16384 16 32738 35072 376842 418590 16384 32 36166 62101 656937 701492 16384 64 60210 82079 886956 1131728 16384 128 68325 99978 843972 940695 16384 256 57913 97077 962285 912199 16384 512 75643 110244 1429784 1385311 32768 4 12667 14568 272605 220529 32768 8 23732 25578 345836 379817 32768 16 32201 41608 559322 563632 32768 32 39161 45063 600563 449590 32768 64 48087 79766 1180536 857173 32768 128 67848 93374 1080199 1078529 32768 256 68936 86549 1584825 1140706 32768 512 86337 104219 1279849 1014737 65536 4 10974 11564 206097 220739 65536 8 20272 20771 422499 283955 65536 16