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 Oct 7 02:58:56 2025 Auto Mode Machine = Linux oleg116-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-oleg116-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 15198 24693 418250 363829 64 8 20732 41477 598110 681644 64 16 29976 79801 1066042 939223 64 32 29990 66381 801764 780776 64 64 37867 120277 1421755 1101022 128 4 20552 25995 230633 317523 128 8 31809 48485 529038 556454 128 16 41409 82005 496272 1065630 128 32 52827 76829 1303699 1306873 128 64 49692 97474 1142750 1543594 128 128 64614 143325 1487977 2420455 256 4 18772 25409 416856 398153 256 8 27055 33983 556398 643033 256 16 42509 60780 1175022 807442 256 32 48522 117763 1552085 759469 256 64 85306 163038 1570244 947860 256 128 88975 197204 2000242 1884399 256 256 77015 212294 1778290 2413957 512 4 23654 24191 422084 309756 512 8 33394 52540 599553 621413 512 16 52669 87399 792486 1075459 512 32 64736 100177 1463057 688118 512 64 70669 169643 1013534 742096 512 128 116705 163371 1954379 1689859 512 256 98935 245320 2116152 1874212 512 512 124183 139548 1333173 1723770 1024 4 17126 20475 274459 307688 1024 8 35082 39697 724179 675967 1024 16 64277 72429 1099918 862650 1024 32 71072 114490 1262555 703769 1024 64 109552 148945 1304745 1150292 1024 128 113801 204797 2077065 1066594 1024 256 136206 229446 1627617 2120127 1024 512 120852 189985 2419964 1612948 2048 4 20654 25842 426409 420522 2048 8 42174 41907 699688 437507 2048 16 61688 55208 1178348 943347 2048 32 76168 106042 1587551 1159109 2048 64 91715 135665 1061035 888509 2048 128 123767 154171 1353426 1257344 2048 256 135539 206058 2195338 1262704 2048 512 122238 223604 2197585 2194777 4096 4 21278 23214 337981 273082 4096 8 39590 47036 397132 364932 4096 16 58503 63150 869611 646058 4096 32 81316 111041 1343877 1282864 4096 64 105057 103837 1612557 1508619 4096 128 104628 164616 2021682 1597561 4096 256 95665 167210 1473426 1333343 4096 512 93697 146421 1512604 1333343 8192 4 19148 20573 266027 279284 8192 8 32775 38800 476194 454374 8192 16 47609 52980 833371 721452 8192 32 70013 104887 1406871 1190862 8192 64 85492 123625 1447042 1147818 8192 128 98864 156317 1784012 1585092 8192 256 100086 132722 1270098 1341453 8192 512 122165 176308 1800465 1267708 16384 4 17663 20358 312826 257796 16384 8 31985 42322 492574 578696 16384 16 55333 63164 913570 757433 16384 32 76342 87587 1114801 1193381 16384 64 68330 112105 1337558 1265976 16384 128 85320 139089 1017843 1348265 16384 256 86306 140701 1702080 1396629 16384 512 101560 131481 1724981 1362513 32768 4 17459 20135 285878 300070 32768 8 30772 33358 496688 380651 32768 16 49958 58423 821522 652359 32768 32 66673 85560 1043862 826348 32768 64 82883 96081 1426620 1186170 32768 128 92296 118483 1494896 1251734 32768 256 95260 148464 1689335 1398075 32768 512 101411 137960 1702055 1328197 65536 4