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 Aug 17 06:31:39 2026 Auto Mode Machine = Linux oleg230-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-oleg230-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 1956 4513 339016 503814 64 8 3434 5454 792299 581273 64 16 3175 4991 1066042 16873 64 32 2702 30873 952555 1083249 64 64 4047 39599 1101022 1828508 128 4 3528 8558 470606 444133 128 8 6103 11824 831319 470606 128 16 3759 26267 1057236 428193 128 32 3325 31634 715059 640042 128 64 7227 66388 1229084 1266785 128 128 3451 22483 1663139 1727352 256 4 6990 5827 241735 414923 256 8 2962 3984 111259 365740 256 16 10416 22222 954602 341759 256 32 12532 32500 947860 518263 256 64 10499 52085 1254656 962301 256 128 14892 57644 1437779 1137672 256 256 10211 36534 1405778 1495866 512 4 5333 7422 408281 478942 512 8 9492 13985 613250 160754 512 16 12046 24764 992456 819085 512 32 16178 50503 821907 949875 512 64 16135 20065 1305615 1069035 512 128 16884 36265 1190529 1171691 512 256 13642 33896 673655 1479181 512 512 19078 64056 285235 1783912 1024 4 8398 8048 376724 416267 1024 8 7135 6014 196056 175858 1024 16 6790 10420 665803 323420 1024 32 18738 38045 1027060 1097669 1024 64 24535 51021 955965 1211964 1024 128 25603 15160 1177088 333776 1024 256 13103 71971 1726407 1558516 1024 512 33405 76401 818431 842843 2048 4 8623 5866 127593 289137 2048 8 5736 6088 414916 300517 2048 16 19600 15137 424366 470686 2048 32 7940 25250 503194 529334 2048 64 30094 37742 1313484 587836 2048 128 23523 36815 163096 1191423 2048 256 27709 45879 814922 1311279 2048 512 30341 42808 343806 735892 4096 4 3278 3244 199629 233721 4096 8 5075 8518 356792 236787 4096 16 12915 8928 254883 110021 4096 32 11215 12742 281665 657456 4096 64 12230 26538 287116 487319 4096 128 35468 24554 1216807 1549158 4096 256 27741 45902 384820 294590 4096 512 44692 73191 745660 386926 8192 4 5693 5637 664780 529917 8192 8 6992 8026 469210 451924 8192 16 14994 11617 676575 400978 8192 32 13959 38850 668675 561206 8192 64 20687 16977 578935 416134 8192 128 26890 34915 686318 700649 8192 256 30703 24101 647188 484384 8192 512 30365 50725 894137 524257 16384 4 5119 4293 257556 267900 16384 8 5385 4718 233301 427155 16384 16 12536 13789 725051 697965 16384 32 13001 18775 826255 704570 16384 64 24046 28383 394547 417278 16384 128 20920 34519 799372 423927 16384 256 21401 40235 1132586 1029153 16384 512 36174 45286 606297 788756 32768 4 5750 4787 242745 202367 32768 8