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 Jul 1 13:47:55 2026 Auto Mode Machine = Linux oleg440-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-oleg440-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 10966 23667 695778 557144 64 8 15373 30277 901377 1310683 64 16 18884 51122 1083249 1049372 64 32 19081 65031 2278628 1232453 64 64 21629 115316 2067979 3203069 128 4 14977 18401 853794 901083 128 8 23171 41397 1637771 1175271 128 16 31495 68848 401007 1316487 128 32 32585 72807 1492113 1778862 128 64 25932 170229 2211113 1508887 128 128 43599 136615 2511022 1997245 256 4 16435 19236 1016025 656399 256 8 17340 33750 850956 1312954 256 16 36010 61199 1868008 1391207 256 32 46334 84104 1619994 1778290 256 64 61554 119121 1319408 1300235 256 128 70235 206774 2081678 2726577 256 256 66647 172966 2205688 2030503 512 4 15749 25185 1145443 1014013 512 8 23504 38398 1032044 1110496 512 16 37410 68139 1261144 1797349 512 32 67404 102835 1462061 1103647 512 64 52766 117568 1594501 1399189 512 128 91425 166719 1809465 1501940 512 256 85289 213238 1747618 2285029 512 512 86529 233249 2845081 2007358 1024 4 17004 21855 935151 796277 1024 8 27802 31461 934337 846164 1024 16 41332 58665 1790460 962391 1024 32 51758 89190 1380217 1065535 1024 64 64096 127172 1501313 1551758 1024 128 80936 162228 1607514 1701108 1024 256 92896 168365 2251260 1532928 1024 512 85233 212361 1837965 1777861 2048 4 19592 20578 757636 597277 2048 8 29779 32225 1523630 1044393 2048 16 52700 68001 1647852 1538641 2048 32 59500 99228 1379287 1736811 2048 64 89124 126701 2426668 1485169 2048 128 87606 135629 1768274 1932143 2048 256 110552 167992 2151353 1901771 2048 512 108663 148028 2350955 2060526 4096 4 17607 20043 654925 995368 4096 8 33150 36762 1053475 995138 4096 16 46713 58634 1278377 1043810 4096 32 61854 79953 1940393 1211487 4096 64 86691 106597 1535726 1281237 4096 128 93994 131839 2113455 1354900 4096 256 112053 170334 2009857 1635118 4096 512 105374 193491 2351214 1935584 8192 4 18968 20308 858611 964678 8192 8 31102 38174 1156589 887738 8192 16 53283 55601 2029301 1424958 8192 32 76644 84865 2068143 1351797 8192 64 89839 125723 1965007 1348932 8192 128 99483 156100 2602260 1254700 8192 256 108443 162000 2022730 1628979 8192 512 109815 178064 2185621 1863548 16384 4 17958 19904 754779 718118 16384 8 32459 35439 1026892 1132904 16384 16 51399 59538 1470979 1097758 16384 32 73186 100907 1425070 1940087 16384 64 96141 121091 2061122 1510191 16384 128 111630 152341 1972781 1666742 16384 256 123213 159734 1825324 1651243 16384 512 123671 172730 2516293 1553586 32768 4 18901 19881 888314 757920 32768 8 32896 36042 1132043 835663 32768 16 50798 57909 1305649 1329713 32768 32 70964 90717 1598837 1277897 32768 64 88729 124785 2346423 1450928 32768 128 110847 152144 2009435 1780670 32768 256 112664 172608 2131966 1825005 32768 512 125192 166831 2015269 1809197 65536 4 18614 19788 883187 753001 65536 8 31183 32653 1050998 1036665 65536 16 48159 53604 1453382 1078088 65536 32