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: Wed Jul 16 13:50:46 2025 Auto Mode Machine = Linux oleg143-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-oleg143-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 5455 17669 252098 307907 64 8 6825 30463 571375 415659 64 16 8937 49999 681644 542506 64 32 14529 61010 633392 969761 64 64 19207 85576 1033216 1232453 128 4 7860 9844 47654 118624 128 8 6598 19326 498114 444501 128 16 17836 21691 640042 538051 128 32 16633 44524 969421 809997 128 64 27820 103208 1074159 985435 128 128 28628 112485 1231904 1663139 256 4 13618 14215 245718 222638 256 8 16769 38489 457143 403085 256 16 28221 52727 600928 554101 256 32 41802 75921 775933 820398 256 64 33337 118858 755195 294191 256 128 52149 134304 1024752 268381 256 256 52436 221262 1802167 1675612 512 4 13842 17484 223282 192189 512 8 16763 36972 442889 418302 512 16 34094 38323 575917 672811 512 32 44008 39822 572691 311780 512 64 39297 103225 1333173 232089 512 128 50572 155290 127584 1303238 512 256 48152 66659 1350783 1199171 512 512 33420 162027 1635797 2039772 1024 4 16145 15252 238638 234328 1024 8 21283 28123 508472 471673 1024 16 37716 52159 825827 331918 1024 32 35092 54540 580181 763576 1024 64 68503 69725 1183902 961529 1024 128 43684 143477 1326096 1160862 1024 256 67927 123853 1515083 1430318 1024 512 62567 113967 956178 1602118 2048 4 13248 13765 166614 115502 2048 8 18522 28999 296084 248036 2048 16 27597 29929 631714 550255 2048 32 36731 64028 439185 783409 2048 64 41575 67099 989759 645044 2048 128 43174 57652 558665 1074439 2048 256 56607 88811 1441069 1292923 2048 512 70951 73648 1571864 1122162 4096 4 14106 15221 211484 245919 4096 8 19187 28964 328199 225523 4096 16 31385 48903 685992 467953 4096 32 41913 58873 596196 449125 4096 64 46579 75367 280758 624954 4096 128 46804 75697 1078202 1106964 4096 256 56832 81507 1109752 914659 4096 512 69030 112286 1176638 554353 8192 4 13297 15609 192188 183850 8192 8 19573 24391 418491 184679 8192 16 31637 40070 335918 581404 8192 32 30152 51072 615525 753010 8192 64 45362 75967 1253007 828388 8192 128 70154 71137 1108671 1194174 8192 256 76682 111903 1141906 391962 8192 512 56598 89548 1241777 1023744 16384 4 3471 13503 203217 175121 16384 8 19047 21170 416578 371746 16384 16 29793 43798 608412 658467 16384 32 47788 69490 919523 597234 16384 64 63964 77298 1129700 808494 16384 128 59179 92354 1140632 728239 16384 256 61965 98932 1616746 1313776 16384 512 70525 83414 1068835 532169 32768 4 10257 15056 212676 206759 32768 8 21740 21981 404089 372182 32768 16 34479 45292 484633 371476 32768 32 50664 65277 883069 642271 32768 64 62609 96269 736820 891697 32768 128 67360 91550 1117636 736954 32768 256 75716 116773 1327658 990416 32768 512 88129 118869 1360178 1221323 65536 4 12456 14188 178027 249178 65536 8 20488 23325 338645 298254 65536 16 36719 43498 505114 478547 65536 32 53963 63448 734100 755965 65536 64 57309 72646 500576 591331