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: Sun Nov 23 00:41:22 2025 Auto Mode Machine = Linux oleg224-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-oleg224-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 9452 20177 359444 264519 64 8 10816 36448 591520 555990 64 16 15385 61191 1101022 1183548 64 32 16376 87901 1421755 481234 64 64 17983 123316 710511 1279447 128 4 12780 16647 234358 228961 128 8 18460 47515 902598 597981 128 16 27856 72728 785122 857887 128 32 29425 118966 978253 1618028 128 64 28822 122606 1155043 2175277 128 128 31235 104657 1618028 2660335 256 4 17576 25414 274979 477472 256 8 26495 46843 560172 436870 256 16 39487 51864 921029 1032636 256 32 30951 106092 1128110 864661 256 64 49447 128456 1985448 1561112 256 128 45390 122074 1361224 1213534 256 256 46808 120634 1642294 2131261 512 4 15133 18725 449941 438011 512 8 31856 33724 758344 567545 512 16 41347 81126 1276891 1077618 512 32 52647 85561 1467055 1711407 512 64 53550 144147 1182010 990168 512 128 70963 161613 1528669 1471074 512 256 63445 113223 1547395 1575781 512 512 85646 183768 1924603 2638816 1024 4 17730 16505 358666 406650 1024 8 24782 39816 656441 392635 1024 16 49358 64265 1212991 1005892 1024 32 46788 91151 1004951 821876 1024 64 71364 145164 1537317 1418039 1024 128 96293 148837 1875690 1516688 1024 256 91419 202251 1841906 2128533 1024 512 83708 157660 1735476 1765437 2048 4 22504 24647 513144 261324 2048 8 42566 48462 885851 751012 2048 16 51821 67938 1334088 661690 2048 32 56662 109254 1677130 1402940 2048 64 95105 169130 1443248 1153815 2048 128 114246 174624 2260624 1955900 2048 256 92073 164404 1553950 2083516 2048 512 99157 183479 2221454 2470639 4096 4 20947 21849 424018 285139 4096 8 36876 38026 427872 409690 4096 16 45626 54507 693889 915731 4096 32 71450 92296 1368062 1049741 4096 64 81479 116076 1253748 1400859 4096 128 94650 133737 1529573 1226362 4096 256 79206 144021 2081196 1932970 4096 512 108010 171574 1910401 2095155 8192 4 20429 20480 417723 383647 8192 8 28752 40041 663586 492515 8192 16 55058 64258 1035936 900110 8192 32 75209 95059 1213104 1308005 8192 64 93086 113410 1631531 1063742 8192 128 94432 134517 1628592 1503655 8192 256 102720 128035 1681432 1546495 8192 512 93503 131380 1717745 1731509 16384 4 19462 22246 405011 433050 16384 8 36236 37925 712718 664419 16384 16 50695 62280 770036 825689 16384 32 76232 85970 1037810 1038736 16384 64 92838 110491 1446823 1514952 16384 128 98768 125316 2021767 1761188 16384 256 91386 119621 1588676 1647956 16384 512 108558 135628 2151867 1793548 32768 4 19322 22104 358237 282841 32768 8 34643 36486 671226 592603 32768 16 52095 62449 1152665 813085 32768 32 62269 82696 1448757 795457 32768 64 88735 117558 1348977 1349189 32768 128 89875 126018 2028984 1359505 32768 256 110933 144283 2108095 1954317 32768 512 109513 145371 2197412 1742693 65536 4 19513 23700 365182 355926 65536 8 36558 40063 698768 651167 65536 16 54851 63916 817892 909969 65536 32 77290 97232 1445814 1419392 65536 64 92263 127699 1672771 1595476 65536 128