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 Aug 21 22:59:23 2026 Auto Mode Machine = Linux oleg632-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-oleg632-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 3552 12213 608965 369844 64 8 7539 15583 752329 754443 64 16 6081 29642 1143223 901377 64 32 4274 44072 1357066 1363961 64 64 6468 56694 1553394 852702 128 4 9557 6000 387686 624409 128 8 5784 26353 870405 747933 128 16 11737 54186 1015251 722760 128 32 8229 37457 1114289 68822 128 64 7324 51160 1557024 1406136 128 128 3845 48873 1346196 1266785 256 4 5184 8674 606700 569079 256 8 14713 24249 807442 807442 256 16 9534 42888 1070737 937924 256 32 9182 52362 1185399 1094754 256 64 24741 80280 844929 1325925 256 128 13775 14305 1212164 1561112 256 256 12190 68795 1696795 817898 512 4 11190 13084 641651 555220 512 8 13440 24614 778128 843537 512 16 6942 16048 449941 360812 512 32 18330 48466 1051242 450224 512 64 14605 55154 1309596 767559 512 128 13560 37271 1471074 1387437 512 256 27082 99707 1471074 1019791 512 512 17914 116207 1520013 939486 1024 4 6364 5568 147361 223047 1024 8 16619 15389 604175 796277 1024 16 19598 28142 993330 549101 1024 32 15046 51932 968904 1130312 1024 64 32717 81083 1147832 1014685 1024 128 29335 69344 1081363 1039489 1024 256 38497 42219 207709 905384 1024 512 26440 52229 1494522 302957 2048 4 6662 10053 263844 207372 2048 8 13709 15302 952552 227476 2048 16 20520 28534 359986 922576 2048 32 33135 40551 659151 1137166 2048 64 36107 45336 926257 827482 2048 128 45650 42747 1119675 714826 2048 256 34767 73682 952130 538661 2048 512 47283 74758 1376193 1001413 4096 4 8283 6435 253058 139371 4096 8 9757 17811 799666 272174 4096 16 27911 22894 645451 330345 4096 32 20369 28622 1044889 481649 4096 64 34547 48933 691905 566603 4096 128 32100 41617 1657679 489485 4096 256 42136 51461 1773899 744045 4096 512 40304 45785 1336454 771962 8192 4 9601 8933 185852 170503 8192 8 2805 15680 862858 556479 8192 16 19376 25970 551203 568579 8192 32 27319 42227 602138 667480 8192 64 37230 44668 566218 701852 8192 128 35793 54896 981543 935040 8192 256 43367 59833 957447 1009250 8192 512 50035 59854 1426437 1014255 16384 4 9717 8878 445219 293510 16384 8 11172 15120 583749 555390 16384 16 21529 24909 910218 821995 16384 32 28094 24784 768555 497132 16384 64 29598 43814 672462 376832 16384 128 41377 53995 829897 941390 16384 256 53010 68119 1124579 878307 16384 512 43715 58425 1371049 1485383 32768 4 7414 8013 214503 172308 32768 8 13036 14896 262584 449745 32768 16 21983 21815 472828 430348 32768 32 25062 34346 506962 610650 32768 64 30273 43809 831819 838657 32768 128 42161 58135 920914 827557 32768 256 45031 70400 1833379 656582 32768 512 49163 68724 1187287 824479 65536 4