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: Sat May 9 15:34:22 2026 Auto Mode Machine = Linux oleg459-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-oleg459-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 8513 15148 769584 560635 64 8 7039 18835 998622 532815 64 16 10460 51903 407457 799377 64 32 7899 45840 1429325 1183548 64 64 8770 64329 538156 1304314 128 4 6384 10267 640042 508012 128 8 15263 24348 1579934 1421023 128 16 13764 25035 618653 947186 128 32 9858 50316 1093856 482881 128 64 14406 65940 1172704 841746 128 128 10029 44064 677178 1155043 256 4 7819 10636 616807 466275 256 8 13061 17893 532133 725106 256 16 15486 27846 900936 582035 256 32 19701 50039 859127 1463250 256 64 23203 62228 1190657 1439707 256 128 25406 88924 1375171 1048775 256 256 27347 192468 2533571 2392442 512 4 9770 12162 708318 621413 512 8 11412 18950 537165 728255 512 16 18077 30061 1036527 744153 512 32 28304 49178 1261144 821907 512 64 31391 42471 984720 1283761 512 128 33311 77552 1009722 1103080 512 256 31052 96257 1273861 1080328 512 512 37290 97876 1155924 1741948 1024 4 12786 12535 562330 542375 1024 8 17208 22773 998874 642016 1024 16 21644 29616 876737 794363 1024 32 28662 43006 915809 821876 1024 64 35018 62733 1072185 989440 1024 128 38891 76129 1085737 1012055 1024 256 39381 81762 1048113 1086836 1024 512 46832 129867 1548960 1291406 2048 4 14415 20603 995610 744761 2048 8 22842 24902 753780 731693 2048 16 28324 31590 939426 827482 2048 32 39367 55110 1099327 988848 2048 64 46677 66662 1087635 896671 2048 128 40226 79496 1023487 1116038 2048 256 52280 93311 1149954 1083109 2048 512 54597 96281 1592555 1471180 4096 4 17410 19625 637997 433672 4096 8 28079 29305 752255 845224 4096 16 32860 52603 730101 788291 4096 32 59920 62313 1393134 1141913 4096 64 57509 83809 1152175 981101 4096 128 61252 77230 962414 891960 4096 256 81002 68044 1243853 1213284 4096 512 55591 110140 982503 821499 8192 4 19006 17885 518185 481911 8192 8 27441 35390 920955 979333 8192 16 41119 43348 1732644 1767766 8192 32 74652 77770 1970642 1842562 8192 64 101689 133834 2108113 1739310 8192 128 115997 114324 2040872 1634169 8192 256 98259 136740 2068641 1741161 8192 512 103897 135669 2133905 1605309 16384 4 17467 19686 623391 901312 16384 8 32921 34754 1225802 624173 16384 16 40938 50028 754017 769243 16384 32 52913 60164 1343520 724538 16384 64 78912 85209 1231138 1036433 16384 128 93985 86906 1205947 998600 16384 256 77383 108893 1203392 743509 16384 512 100475 124916 1701532 1481125 32768 4 17773 20831 603218 503495 32768 8 28159 33799 769075 664207 32768 16 41728 44792 1319209 964336 32768 32 64946 73395 1247734 891477 32768 64 62046 95296 1458488 992670 32768 128 82125 95134 2164195 1302593 32768 256 91259 103705 1242298 1101999 32768 512 101828 108968 1159599 1412777 65536 4