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: Thu Jun 25 00:22:55 2026 Auto Mode Machine = Linux oleg455-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-oleg455-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 10220 14618 621657 608965 64 8 15344 26379 633392 1049372 64 16 11500 46371 842003 1138375 64 32 21333 81005 1143223 929467 64 64 20711 86709 2467108 2379626 128 4 11276 16196 587511 524387 128 8 19061 28887 809997 771581 128 16 21315 63551 1332828 883293 128 32 22763 84762 1278855 1048974 128 64 38323 124281 1424795 1278855 128 128 23196 155533 1487977 3036502 256 4 15988 17867 591330 557844 256 8 24469 39962 711178 731528 256 16 27810 64177 1855098 1552085 256 32 46827 82501 1718521 1319408 256 64 57349 126847 1514860 1163562 256 128 49593 132777 1619994 1384034 256 256 65040 146529 1662639 1868008 512 4 14598 19204 631277 473660 512 8 26779 42307 960496 748563 512 16 40470 57411 1880778 1187895 512 32 44995 83024 2097550 1450212 512 64 61821 140470 1242896 1082507 512 128 72335 136679 1296941 1289930 512 256 69424 166075 1375881 1551867 512 512 65265 180342 1712772 2039772 1024 4 16102 17633 551995 511195 1024 8 26607 34930 799985 1004951 1024 16 42214 52408 994941 934134 1024 32 47462 55255 1110727 978841 1024 64 59252 68353 1414304 1094034 1024 128 74749 129441 1774189 1183575 1024 256 64357 112219 1203474 1283303 1024 512 78185 134736 1484193 1125277 2048 4 15469 16659 605914 481207 2048 8 25045 31370 769100 720583 2048 16 42352 48714 1023000 1041228 2048 32 50885 66847 1183707 1146730 2048 64 78927 121935 1316100 1109408 2048 128 68616 112993 1646273 1395193 2048 256 95987 141760 1434092 1492654 2048 512 90448 148384 1744572 1528510 4096 4 18179 18041 705486 671907 4096 8 30734 35875 870183 878594 4096 16 45679 57587 1051347 1152794 4096 32 54392 69835 1620313 1386613 4096 64 87221 102592 1798787 1643093 4096 128 78032 111964 1314872 893537 4096 256 93101 131831 1431678 1078473 4096 512 90107 133794 2000961 1259539 8192 4 16661 17914 612759 746824 8192 8 28896 33035 1123572 870113 8192 16 46038 49832 899733 828308 8192 32 62052 79795 1361493 1124675 8192 64 79765 99235 1619916 1204007 8192 128 85748 119164 1768858 1734131 8192 256 86373 144973 1800088 1360361 8192 512 104833 142556 1773973 1413643 16384 4 16001 17198 586920 520587 16384 8 26628 31020 870519 762653 16384 16 46172 53220 1363974 1200197 16384 32 69948 82697 1301337 1464272 16384 64 79942 101608 1418920 1350464 16384 128 93629 128620 1538973 1257497 16384 256 91651 126209 1692564 1331390 16384 512 100011 144451 1504076 1550956 32768 4 16894 17482 660952 702858 32768 8 26706 31278 961812 984521 32768 16 44576 48926 1047738 891211 32768 32 52994 76861 1138363 1080343 32768 64 80448 109725 1653703 1271702 32768 128 93020 131326 1513398 1273587 32768 256 106538 146083 1740751 1458751 32768 512 115463 160748 1849017 1563213 65536 4