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 Mar 15 17:25:26 2026 Auto Mode Machine = Linux oleg431-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-oleg431-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 1005 5811 598110 581273 64 8 3088 5520 760859 591520 64 16 3673 14171 712397 763021 64 32 4468 27200 1105556 969761 64 64 1725 61066 1336792 1879725 128 4 2329 4066 268327 304037 128 8 2953 9146 814915 707520 128 16 4344 19061 853794 558771 128 32 3457 32796 1278855 731625 128 64 8318 21647 889145 1114289 128 128 7504 80300 919605 1561553 256 4 4134 5220 768712 952062 256 8 6417 13178 831194 440634 256 16 4207 15135 605332 927393 256 32 10115 31139 1292410 1089202 256 64 5914 16252 753077 1180188 256 128 11410 49524 1552085 320347 256 256 9864 64844 782721 1897721 512 4 5420 4817 199602 34074 512 8 4198 9935 289738 497125 512 16 8157 19396 896725 828566 512 32 16617 36137 815044 492225 512 64 14256 14320 61709 1007827 512 128 13069 47623 336132 1213400 512 256 7790 43802 1537424 1446306 512 512 24158 51087 849208 2187279 1024 4 7036 5906 219368 144330 1024 8 5707 7059 846331 432794 1024 16 24173 10564 1045817 511013 1024 32 20688 10308 1145383 137655 1024 64 11404 18785 385689 1167489 1024 128 9509 36265 1387798 484605 1024 256 26992 61321 1575091 1416169 1024 512 33956 57139 386001 811472 2048 4 3048 5060 121104 423654 2048 8 5830 7647 840353 498319 2048 16 19119 28610 972503 809545 2048 32 26171 36121 641001 581508 2048 64 21111 19222 258617 1220541 2048 128 14587 25093 1443248 334306 2048 256 17259 38004 677503 794128 2048 512 23046 49303 1337619 1354493 4096 4 3377 3458 95618 210731 4096 8 4857 6278 354386 145268 4096 16 9629 22702 511933 432384 4096 32 25712 36133 650880 478897 4096 64 34621 1258 975253 881841 4096 128 19117 20711 504491 175537 4096 256 21546 54367 743112 753773 4096 512 49367 58063 340109 279434 8192 4 3597 4122 151718 291770 8192 8 5832 5978 288258 332724 8192 16 9541 12159 369142 341402 8192 32 12327 20820 415204 432503 8192 64 14151 22864 747864 527056 8192 128 27310 37408 668180 754465 8192 256 36550 43568 931339 394265 8192 512 36400 37953 744042 487359 16384 4 3772 4405 325319 279643 16384 8 8451 6778 448040 184469 16384 16 11959 14268 428912 264083 16384 32 12916 19817 497510 234084 16384 64 15671 20974 404016 279419 16384 128 17301 19349 626683 388577 16384 256 27621 28451 514668 400998 16384 512 28146 32728 769855 321884 32768 4