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: Mon May 4 12:04:08 2026 Auto Mode Machine = Linux oleg418-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-oleg418-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 2873 12326 653436 592827 64 8 5620 13985 799377 811459 64 16 6387 25127 929467 760859 64 32 5154 7599 969761 1083249 64 64 5152 39728 1105556 610350 128 4 2113 11194 389091 465304 128 8 4702 10749 935631 695603 128 16 14204 32330 558771 935631 128 32 7313 32439 1152564 1074159 128 64 13885 80966 1391557 1561553 128 128 9044 95108 1579934 2066432 256 4 6355 15591 308475 504861 256 8 7869 17305 870268 173105 256 16 11800 19296 844929 302991 256 32 19401 28789 1201314 944525 256 64 18965 48202 1445521 1256123 256 128 15795 120933 1437779 1312954 256 256 16013 126043 1407621 482839 512 4 5491 10169 668413 501419 512 8 11409 14450 840566 676414 512 16 9838 41673 1002183 439085 512 32 19173 25350 1227269 1014013 512 64 11219 30372 1309596 1064266 512 128 20657 64941 1471074 1158418 512 256 24911 48766 1442420 1300082 512 512 18324 26332 1537424 917804 1024 4 8620 8303 458971 141903 1024 8 12713 12823 538431 148620 1024 16 16018 17146 1174192 805688 1024 32 20591 35751 727861 968904 1024 64 22790 20193 177655 1050164 1024 128 24953 64245 840698 397211 1024 256 37425 57366 1641301 891848 1024 512 23546 105688 1681790 453495 2048 4 5760 5525 636819 277651 2048 8 12859 10980 560488 299063 2048 16 19666 30012 962478 270823 2048 32 30379 36736 823121 665586 2048 64 29110 82620 730386 645044 2048 128 28213 43570 1220368 899017 2048 256 35806 69768 1172398 1345582 2048 512 42400 75318 1074036 792297 4096 4 8693 11181 279798 403029 4096 8 13655 10901 277225 223912 4096 16 16345 30648 462199 380247 4096 32 28735 38581 739338 426672 4096 64 31439 50611 556743 554264 4096 128 45402 52626 1078473 748258 4096 256 29086 58363 630921 477234 4096 512 39563 60520 570630 424018 8192 4 8425 9456 500245 364510 8192 8 12179 16467 326415 368047 8192 16 23487 26910 453852 491711 8192 32 26754 37464 935040 652745 8192 64 33513 54169 1083602 665579 8192 128 36042 48158 748271 374200 8192 256 40453 52092 703245 612256 8192 512 42074 60833 415585 630537 16384 4 7065 9560 387235 436639 16384 8 13533 15044 434865 552115 16384 16 22497 22837 876850 570751 16384 32 29877 31563 437503 487822 16384 64 28492 34996 686639 782345 16384 128 44577 55557 656491 550628 16384 256 39444 52622 1045897 631875 16384 512 44913 77012 1376459 796380 32768 4 8020 8075 321664 444125 32768 8 13406 13600 403343 501093 32768 16 14902 19247 762808 857777 32768 32 24328 31130 430144 448341 32768 64 31129 47716 766719 858254 32768 128 36546 55470 562424 768352 32768 256 40778 74352 1095997 890969 32768 512 63038 62250 815188 1066279 65536 4