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 Jan 7 21:40:52 2026 Auto Mode Machine = Linux oleg212-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-oleg212-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 13160 19212 615952 450541 64 8 7656 32079 801764 659861 64 16 8958 48852 1017549 710511 64 32 28533 91810 1210227 969761 64 64 31730 96810 511494 1638743 128 4 16070 22796 549056 518312 128 8 26289 48891 795593 735635 128 16 14215 43098 1024942 852438 128 32 50077 93567 1827299 1243315 128 64 55076 110358 1269781 1111981 128 128 51548 157449 1579934 670413 256 4 20911 24990 572721 773140 256 8 29934 51518 759469 766517 256 16 38706 54284 1230218 898674 256 32 51864 103475 1718521 1178892 256 64 61158 117711 1523457 1286217 256 128 72624 173553 1053922 579209 256 256 64926 152006 1662639 1884399 512 4 21849 24724 832420 590648 512 8 35759 43719 932956 984720 512 16 54014 72335 1040545 1100818 512 32 32590 69964 1187895 1021732 512 64 51390 143579 1306409 1354190 512 128 76203 169817 1954379 1463057 512 256 92250 90155 1546280 1684557 512 512 103829 201173 1640796 2160868 1024 4 20369 26422 806293 650969 1024 8 36986 44004 935151 1025099 1024 16 59844 73289 927477 913471 1024 32 70644 117001 1532928 1044799 1024 64 89385 189349 1723636 1271902 1024 128 111851 209666 1703807 1446211 1024 256 130813 228421 2211841 1496605 1024 512 107034 224224 1736178 1906496 2048 4 24028 28175 806884 752921 2048 8 39973 45375 995149 1135212 2048 16 57812 69852 1373553 1109981 2048 32 82827 88862 1492654 1311879 2048 64 69992 128698 1509440 1246398 2048 128 91123 175176 1652925 1268859 2048 256 100882 158820 1634370 1400881 2048 512 119333 203096 1858566 1727034 4096 4 22064 24750 648938 688411 4096 8 37535 45607 880079 951276 4096 16 56157 71691 1441771 904355 4096 32 81231 107647 1497051 1455575 4096 64 85651 116674 1235890 1176960 4096 128 102770 161163 1706077 1148632 4096 256 101175 152983 1828656 1232963 4096 512 120141 176948 2058256 1642308 8192 4 21365 24845 852180 754946 8192 8 37324 45029 1110319 831073 8192 16 64003 70803 1333540 995622 8192 32 83623 90026 1374950 1471773 8192 64 100604 144829 1650973 1363762 8192 128 118989 146912 1789028 1697128 8192 256 118612 195238 1942127 1765949 8192 512 128130 154129 2188684 1729330 16384 4 23575 26064 686838 776343 16384 8 38801 44468 1119523 894274 16384 16 57961 68581 1412765 1213828 16384 32 79817 111133 1306856 1332035 16384 64 95479 140477 1668604 1300623 16384 128 117598 169271 1845471 1695027 16384 256 110731 171345 1804996 1287344 16384 512 124114 168724 1539421 1512285 32768 4 22452 24798 715974 601070 32768 8 35316 43023 883665 813643 32768 16 56064 72273 1344490 1168829 32768 32 85911 105980 1488436 1267187 32768 64 99755 135641 1796592 1469089 32768 128 110780 160023 1623062 1303729 32768 256 119551 160594 1606030 1441357 32768 512 121380 173693 1666900 1448436 65536 4 22576 25228 774007 730833 65536 8