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 24 04:46:36 2026 Auto Mode Machine = Linux oleg416-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-oleg416-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 5634 4108 528618 532815 64 8 5995 29534 743988 257911 64 16 2727 24950 298990 771797 64 32 2897 45786 1330167 760859 64 64 5214 69564 1183548 1392258 128 4 1899 4855 292922 255433 128 8 6725 14685 707520 800337 128 16 8240 17910 317711 914904 128 32 12916 79210 1349580 1102844 128 64 13245 45390 1196221 1291158 128 128 6457 112367 1663139 1939522 256 4 5875 4108 567575 494172 256 8 4084 9963 757326 740100 256 16 9104 8811 1007446 864661 256 32 4745 47301 1044693 1089202 256 64 14450 57632 551823 1169901 256 128 13025 78336 1391207 1514860 256 256 11360 111213 1718521 1924938 512 4 10507 4014 389898 394772 512 8 16514 8647 859060 690108 512 16 20551 42198 727268 949875 512 32 20715 55956 773364 522399 512 64 30494 54795 1239310 668413 512 128 22315 32578 1216149 1355045 512 256 32311 103894 850554 1081961 512 512 15950 88487 1801873 2187279 1024 4 6603 4368 549031 80350 1024 8 18575 15082 339985 260968 1024 16 19798 20766 1072185 910181 1024 32 32327 61579 1247519 859026 1024 64 16288 28704 1242826 303599 1024 128 27164 32796 1503942 234264 1024 256 19305 112082 425042 164894 1024 512 18101 36425 542649 1039489 2048 4 5526 7055 227609 443768 2048 8 12312 9740 278832 782339 2048 16 21212 23448 1026668 260389 2048 32 14669 21121 594302 308570 2048 64 13912 16550 1391351 1142156 2048 128 22687 45242 382372 351588 2048 256 25994 53475 646647 543948 2048 512 34857 57134 868915 1459680 4096 4 4510 5675 149293 156276 4096 8 15362 14886 374127 375542 4096 16 11692 20466 580247 623457 4096 32 21694 41590 189454 407764 4096 64 28098 46488 961983 542091 4096 128 39659 41303 453093 891404 4096 256 51890 63252 561933 327049 4096 512 29496 61279 631524 936242 8192 4 6889 6562 242969 166476 8192 8 12713 10531 442165 483451 8192 16 21382 19853 691067 601959 8192 32 26435 35101 669939 586435 8192 64 21544 36215 928169 808201 8192 128 18630 32462 704933 345230 8192 256 38540 60070 1025639 1024110 8192 512 36509 50280 780268 672141 16384 4 5881 6195 212511 185052 16384 8 7543 8249 430741 363168 16384 16 12706 12861 437958 273522 16384 32 23547 35045 373636 575280 16384 64 22898 27160 355147 335889 16384 128 33615 37067 601531 383242 16384 256 53827 49383 1029785 556803 16384 512 41911 52213 1287947 875632 32768 4 5415 6108 250770 139656 32768 8 13773 11825 401430 292646 32768 16