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: Tue Jun 16 21:51:20 2026 Auto Mode Machine = Linux oleg213-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-oleg213-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 8507 15751 467002 889431 64 8 12003 28933 821391 743988 64 16 14288 53337 1066042 1722886 64 32 4454 55269 58332 1210227 64 64 11897 82906 1357066 855419 128 4 9985 18724 948860 889145 128 8 16851 34024 955616 805138 128 16 25049 60262 1349580 1254941 128 32 16630 55531 1231904 908709 128 64 23512 77294 1076312 1543594 128 128 20479 107292 1332828 1778862 256 4 13286 19119 809878 944525 256 8 21966 29791 850956 612235 256 16 20298 60275 1208072 1066483 256 32 34886 70618 1185399 844929 256 64 39083 110492 1673001 1911233 256 128 51822 149363 1430119 1814348 256 256 40093 129229 1561112 1868008 512 4 12563 16361 826971 489979 512 8 21854 36981 842214 967855 512 16 31443 52049 1187895 951558 512 32 33900 75515 1165966 1213400 512 64 43156 110060 1442420 1413929 512 128 62233 97022 2014892 1652157 512 256 59541 146828 2327124 1514652 512 512 46184 124630 2535981 2007358 1024 4 14766 17468 831100 730336 1024 8 27713 31576 895754 914249 1024 16 36726 45088 1166221 1221964 1024 32 46787 59020 1652033 1033237 1024 64 64040 92494 1406891 1214706 1024 128 77189 124452 2316837 1698417 1024 256 58685 135629 2254805 1460472 1024 512 74401 131736 2169388 2295784 2048 4 16223 19159 801239 670417 2048 8 24292 31348 1033337 1162246 2048 16 41536 49341 1059987 934826 2048 32 52272 69128 1152422 1125839 2048 64 64927 110232 1731211 1449580 2048 128 71202 116377 1422220 1607757 2048 256 88566 156502 1571864 1616227 2048 512 72441 139140 1625402 1351935 4096 4 15984 16656 819032 625249 4096 8 26371 29147 1183446 890434 4096 16 38882 54696 1095458 992264 4096 32 58555 78168 1329834 780200 4096 64 65839 97486 1348201 1592526 4096 128 80517 118514 1883384 1502550 4096 256 85452 138304 1913167 1722498 4096 512 90304 138341 2270425 1905950 8192 4 16608 17180 765321 681811 8192 8 29388 30923 1028987 995853 8192 16 46152 48960 1221036 1300332 8192 32 67931 69626 1609445 1226003 8192 64 71586 92750 1275805 1386378 8192 128 87739 116421 1664973 977940 8192 256 89993 134394 1712352 1569955 8192 512 93367 149724 2052576 1644257 16384 4 17145 18862 868395 734709 16384 8 28421 31151 1117520 987763 16384 16 44431 53380 1599399 1057583 16384 32 65486 89020 1807180 1312622 16384 64 79205 107707 1950938 1582858 16384 128 94295 109544 2014005 1673358 16384 256 99389 112610 2058035 1672177 16384 512 102018 118879 2167751 1516591 32768 4 16419 17529 688403 637150 32768 8 27359 30277 1119658 936386 32768 16 45008 52645 1384136 1152945 32768 32 59188 75201 1750239 1217277 32768 64 86245 93397 1884951 1711380 32768 128 88548 122981 1906893 1760304 32768 256 102146 126489 1885157 1618017 32768 512 97426 135502 1884615 1680412 65536 4