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 Sep 4 12:57:02 2026 Auto Mode Machine = Linux oleg339-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-oleg339-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 2723 8270 512471 520419 64 8 4414 10987 390278 754443 64 16 4930 28505 842003 158855 64 32 2344 23495 1163036 987600 64 64 3125 67585 983980 1734015 128 4 2546 5982 542400 447464 128 8 3512 4283 770474 677178 128 16 4327 11267 631014 914904 128 32 3466 7280 1254941 962469 128 64 7710 25594 213314 1306873 128 128 3937 25801 481150 1584598 256 4 4048 3798 202371 339061 256 8 4033 18703 446684 672010 256 16 11959 11189 1066483 436870 256 32 10613 46410 1231629 913973 256 64 12631 29233 1334162 1241598 256 128 7733 64304 555535 1453348 256 256 9222 58248 448175 1325925 512 4 4506 6025 578554 333729 512 8 5914 9660 519744 491324 512 16 8450 17977 909255 640694 512 32 14593 42314 1264858 642227 512 64 11049 25137 306967 491436 512 128 12262 25742 1590957 153800 512 256 14545 46685 1082507 389969 512 512 28133 86690 1395552 1718254 1024 4 4568 6052 192015 545544 1024 8 8322 8795 502699 722717 1024 16 9047 17397 649787 907105 1024 32 11834 24636 1187831 336838 1024 64 32074 49259 1104727 1194770 1024 128 21669 50690 1488307 671948 1024 256 34465 75554 1171629 438181 1024 512 30962 86341 1092921 1363565 2048 4 4715 7399 242367 404902 2048 8 10721 10592 296216 774230 2048 16 8356 17101 186284 395361 2048 32 10510 12328 890074 221191 2048 64 12482 24010 1153815 714113 2048 128 26746 62500 745796 1292145 2048 256 38674 48218 1578798 833504 2048 512 43681 85298 1639674 1477506 4096 4 4782 7137 223618 157878 4096 8 9724 10946 306981 428320 4096 16 13721 16578 616410 569665 4096 32 16560 33103 584472 416898 4096 64 23781 24457 690043 501956 4096 128 46410 71897 714821 950329 4096 256 26729 63287 882566 692574 4096 512 30949 56896 544169 882929 8192 4 5518 6431 369575 204096 8192 8 8544 13601 404880 454224 8192 16 19379 17812 826972 513861 8192 32 17174 27889 786483 874832 8192 64 26813 24502 730191 382698 8192 128 23642 29949 1144454 508447 8192 256 19025 36293 826714 1085896 8192 512 38219 34298 623195 545117 16384 4 5031 6266 194027 148082 16384 8 8932 9597 384718 324680 16384 16 11630 15581 487604 589058 16384 32 19496 34213 609821 590521 16384 64 22645 34371 729182 415374 16384 128 21775 37303 518251 426765 16384 256 28423 33484 942100 461456 16384 512 29457 37434 729244 709107 32768 4 6071 6475 274099 384759 32768 8 10243 8145 374243 283210 32768 16 13871 15498 295836 418066 32768 32 19548 24228 591278 882638 32768 64