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 Sep 8 07:04:27 2026 Auto Mode Machine = Linux oleg152-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-oleg152-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 2761 6297 581273 621657 64 8 998 24586 889431 557144 64 16 1132 27791 969761 942521 64 32 2158 18093 1310683 1336792 64 64 2018 4204 1780008 1163036 128 4 6371 12955 612303 351630 128 8 4170 8207 470606 499970 128 16 5763 24801 1102844 301815 128 32 5208 25963 1306873 551878 128 64 6519 31881 1196221 1377278 128 128 6509 86025 1243315 1598754 256 4 7342 12077 483056 557554 256 8 4999 10233 412215 973645 256 16 6493 12292 955451 414923 256 32 5476 8498 984356 582035 256 64 11766 9833 970126 1076103 256 128 9020 32590 1114064 299776 256 256 6568 28178 525621 428843 512 4 5324 8038 191196 235966 512 8 5528 10196 786391 274515 512 16 12015 15982 815353 285539 512 32 13758 15139 701378 1015932 512 64 11923 50742 1094088 1323315 512 128 14500 32042 381788 254960 512 256 19216 35281 462938 1365383 512 512 8929 58641 1153441 1917728 1024 4 3999 4990 112146 603411 1024 8 11621 16198 387569 724179 1024 16 18992 35355 643652 1095150 1024 32 34907 28978 839384 628212 1024 64 23368 42023 916786 957884 1024 128 26702 79385 1450607 1127641 1024 256 16063 85856 1612948 964336 1024 512 42314 80814 1756772 917570 2048 4 7274 11175 631528 651206 2048 8 11163 10265 335455 368748 2048 16 24643 37559 1200582 500001 2048 32 31525 46379 850504 745019 2048 64 36718 71132 907853 1416357 2048 128 30497 47798 677022 502341 2048 256 39206 46897 1513429 732754 2048 512 44830 85447 1098203 1573015 4096 4 11433 11080 401729 391324 4096 8 13688 21019 668196 547743 4096 16 20988 21989 1227150 365873 4096 32 32107 50677 1405673 931521 4096 64 43412 58922 1590757 766315 4096 128 48543 61232 1224177 637689 4096 256 43872 50741 1754873 1470777 4096 512 23492 70053 824812 837274 8192 4 5987 5407 354615 535917 8192 8 12662 11218 706339 405062 8192 16 16664 17292 428448 383968 8192 32 25161 36052 1388002 681865 8192 64 27643 44572 1004294 984017 8192 128 27086 38479 704991 600581 8192 256 33111 43961 1339205 824967 8192 512 39412 44761 579962 569163 16384 4 5980 7218 436544 233926 16384 8 10119 9719 433280 183118 16384 16 14221 18229 621244 473856 16384 32 18377 26515 1035652 545497 16384 64 23360 27995 731791 465904 16384 128 23862 37414 1092054 788069 16384 256 25842 33474 406619 405171 16384 512 25326 32385 876760 863268 32768 4 5385 5565 359610 246436 32768 8 9467 7837 618590 444136 32768 16 12650 21282 916230 736674 32768 32 19013 35016 953445 700187 32768 64 26982 38603 643191 538124 32768 128 24254 33674 748281 527350 32768 256