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: Tue Nov 18 19:05:05 2025 Auto Mode Machine = Linux oleg332-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-oleg332-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 2398 13258 315136 254971 64 8 1489 13278 409946 365314 64 16 5031 8943 598110 503814 64 32 2083 54885 1066042 31008 64 64 2455 27997 801764 1255511 128 4 2393 5948 203452 172971 128 8 3990 13263 387686 348888 128 16 6737 50114 568836 559353 128 32 12418 64482 1000121 677178 128 64 5261 72522 646205 508012 128 128 11644 93016 948860 1539168 256 4 8240 16756 320825 263896 256 8 10588 17207 522297 290923 256 16 6145 14387 891956 366739 256 32 13061 29150 891956 656399 256 64 11651 53232 1061213 768712 256 128 8927 84408 1312954 22350 256 256 10369 79655 1570244 1924938 512 4 9136 13991 268207 245938 512 8 12594 17097 390252 60513 512 16 7359 30836 488975 506385 512 32 13440 57683 265127 158710 512 64 12020 21528 1185272 878027 512 128 30245 107273 1551867 1347393 512 256 11681 102874 1605228 1565443 512 512 17461 111936 1546280 1999881 1024 4 12542 15173 93764 120999 1024 8 15179 21801 319499 176190 1024 16 18222 35063 656040 556212 1024 32 32751 43948 296045 229753 1024 64 23279 32657 600627 1019019 1024 128 32732 63460 1275301 1182272 1024 256 42019 106501 1556257 1233900 1024 512 37218 107800 1381548 1484193 2048 4 7570 5507 121421 76423 2048 8 10996 18590 381100 387146 2048 16 27479 35016 643016 481422 2048 32 37588 46952 761059 784124 2048 64 21276 20543 454498 999084 2048 128 37804 30239 1386635 745537 2048 256 27183 103612 1405695 966485 2048 512 45353 103623 1469167 1469167 4096 4 6461 6702 94072 62096 4096 8 15545 13338 339631 226221 4096 16 18978 24577 268063 469564 4096 32 43956 67586 1015070 587410 4096 64 27697 36363 342475 237863 4096 128 40139 51946 470542 511811 4096 256 52169 63172 1659601 331928 4096 512 28930 72397 394687 826161 8192 4 9008 8814 97644 116088 8192 8 9251 11096 442336 376211 8192 16 14217 17771 214422 230546 8192 32 20282 32612 741025 755727 8192 64 41583 34093 828148 543015 8192 128 33969 54660 825720 724128 8192 256 35450 67839 1270427 791501 8192 512 47942 71709 1144111 661122 16384 4 10708 9001 140890 104655 16384 8 9611 14305 436453 159114 16384 16 23249 23570 538487 391897 16384 32 25086 26734 739047 640300 16384 64 42483 47013 654990 637142 16384 128 47795 87277 1374587 1113410 16384 256 46219 79577 1116685 1355392 16384 512 48677 64205 823147 1271151 32768 4 9385 12369 212362 163602 32768 8 17857 20123 383153 196608 32768 16 24751 25966 333418 449954 32768 32 38225 39167 584849 338263 32768 64 36282 65959 729975 502045 32768 128 47238 62709 498623 789512 32768 256 61208 53665 603340 759802 32768 512 56858 57347 1304101 1137741 65536 4 10332 10739 127508 130073 65536 8