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 Jan 30 01:22:52 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 5058 6329 56043 125507 64 8 3379 28557 148077 271200 64 16 6955 26745 193843 357529 64 32 7225 47698 460591 592827 64 64 3056 44290 727850 901377 128 4 6412 7664 110836 125472 128 8 8261 5806 135888 225784 128 16 4286 24215 375222 381895 128 32 9987 36373 601330 574312 128 64 14364 90844 715059 921183 128 128 12122 68011 396271 285144 256 4 3948 4947 41755 130153 256 8 2973 6566 84654 72253 256 16 17384 23798 197531 364746 256 32 17340 61304 643419 773697 256 64 20182 100822 763791 87432 256 128 19633 83140 1012194 780445 256 256 13284 66215 2223962 2441400 512 4 10050 12403 57265 61501 512 8 7941 10900 86484 94172 512 16 18126 41918 130412 207110 512 32 23611 53344 451075 438368 512 64 57715 55119 541773 351884 512 128 23436 90876 1143004 1073309 512 256 27941 111304 1343179 1402845 512 512 39318 72143 808904 1723770 1024 4 8948 11609 59448 25589 1024 8 12180 10298 126483 44949 1024 16 18154 30973 389361 355549 1024 32 22866 15108 646461 314032 1024 64 28670 22118 473024 812701 1024 128 28259 39218 733078 382359 1024 256 23763 61735 357413 584523 1024 512 28093 86144 549663 1357961 2048 4 5146 5149 26687 52042 2048 8 5895 10634 71989 96096 2048 16 11380 16882 85779 131114 2048 32 27564 28738 448541 361395 2048 64 36713 45402 330003 333449 2048 128 37975 71341 525513 1036454 2048 256 59886 47219 433817 1154436 2048 512 33680 58442 442990 1381950 4096 4 7149 7841 48534 53174 4096 8 5522 7711 103028 54610 4096 16 20348 15024 131847 116357 4096 32 15617 25255 200353 158611 4096 64 16923 33432 371049 339920 4096 128 28021 39430 902408 132085 4096 256 28122 59181 302735 704994 4096 512 32295 48138 577458 644846 8192 4 6256 5744 37381 50795 8192 8 14928 24060 167498 132016 8192 16 15426 15902 176826 225911 8192 32 25397 29874 555651 264489 8192 64 54975 47197 502021 579795 8192 128 25365 44595 820691 603556 8192 256 31547 54287 559597 906402 8192 512 29350 51416 390914 339268 16384 4 5241 5163 42217 46947 16384 8 11268 13176 52114 80242 16384 16 22269 17344 153167 83767 16384 32 17860 18607 231066 327248 16384 64 18445 26255 402435 411203 16384 128 29579 27553 457538 535128 16384 256 39412 73963 179216 545133 16384 512 21991 51060 551021 734937 32768 4 5379 5218 51061 43859 32768 8