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 Sep 14 02:25:12 2026 Auto Mode Machine = Linux oleg324-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-oleg324-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 4497 15602 603489 394870 64 8 6931 9352 1017549 402569 64 16 9679 26123 1049372 209911 64 32 9072 78151 491815 1033216 64 64 6677 56995 929467 1599680 128 4 5697 10093 496272 581781 128 8 11771 13222 934004 816154 128 16 12193 55411 1133103 571257 128 32 14039 44064 1471662 947186 128 64 14268 42779 1346196 1185654 128 128 17827 48967 1598754 1114289 256 4 11241 12657 450620 507966 256 8 12918 16153 753077 324903 256 16 16732 38994 1312954 941213 256 32 18402 53069 1175022 1230218 256 64 24309 52503 1267990 1293967 256 128 17388 100746 1532153 1093639 256 256 28729 44091 1881098 2223962 512 4 10503 12854 373163 190772 512 8 12173 27239 609421 274972 512 16 19894 50447 1145443 971357 512 32 19934 73225 1320061 1051242 512 64 50166 63610 1476130 1193175 512 128 34896 50473 703445 1391032 512 256 24661 72883 1230786 1488408 512 512 25409 136932 1450212 165792 1024 4 8959 8825 634805 597452 1024 8 22180 18552 318103 849008 1024 16 18384 44315 1119120 972414 1024 32 40360 65355 707245 687766 1024 64 27381 38496 655639 885778 1024 128 22400 78533 1245710 606993 1024 256 46429 84086 1360111 1340582 1024 512 53027 112676 1124099 921705 2048 4 9526 11486 176038 404026 2048 8 10618 14445 927157 309504 2048 16 22173 25743 362478 390401 2048 32 29651 38913 697529 435754 2048 64 36942 39030 1590196 1259557 2048 128 53149 73304 1327285 1073365 2048 256 39122 54844 1489548 938605 2048 512 38239 66220 506696 850841 4096 4 11145 12981 330027 314570 4096 8 17308 16750 588416 363051 4096 16 27640 29241 706327 709390 4096 32 36766 60474 1037757 667962 4096 64 37993 46175 923956 1025553 4096 128 35770 89980 1294561 625819 4096 256 59289 69699 1439235 1119734 4096 512 48758 81952 766315 1299555 8192 4 12009 13552 542946 454206 8192 8 18859 24019 1012850 451200 8192 16 23850 27909 942917 671366 8192 32 47890 62245 1154956 802594 8192 64 49380 71836 1307557 948566 8192 128 57819 77487 1619611 1439464 8192 256 69550 79556 1072943 844285 8192 512 65853 132836 1819245 906187 16384 4 15817 4572 518055 483175 16384 8 21678 24336 727499 638658 16384 16 28239 37392 1064118 1003793 16384 32 40509 54337 1006144 755235 16384 64 53698 61438 864539 730709 16384 128 44306 71061 1218240 878734 16384 256 51099 88811 1283305 750009 16384 512 64854 113702 1427557 991168 32768 4 13178 12830 300058 402491 32768 8 19714 21368 625821 797215 32768 16 27098 32458 851358 666694 32768 32 41084 59431 858613 879486 32768 64 52030 62837 1415585 900413 32768 128 58744 70024 735979 915613 32768 256 63530 81029 945736 858425 32768 512 61977 104229 1169287 1347364 65536 4 12730 13442 407590 429156 65536 8 19677 21613 670274 642598 65536 16 34497 43588 745209 804449 65536 32 52292 59955 910297 778373 65536 64 54674 86011 1807791 1154062 65536 128 61405 96228 943968 1123786 65536 256