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 Aug 26 04:51:20 2026 Auto Mode Machine = Linux oleg302-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-oleg302-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 2266 12623 289635 538156 64 8 2880 22710 1013707 743988 64 16 3749 26924 942521 901377 64 32 1984 12769 1226821 1163036 64 64 1298 33231 645579 170240 128 4 5344 8256 145264 172693 128 8 5319 9663 1024942 417212 128 16 4599 32455 1266785 1074159 128 32 6292 55919 381082 1015251 128 64 6199 54077 848397 1732927 128 128 5277 31597 1526043 1598754 256 4 6006 7632 259370 383779 256 8 7667 13387 523570 405062 256 16 8489 28738 399486 812329 256 32 17677 56978 582983 980760 256 64 13309 42154 608074 1201314 256 128 13828 88579 1506359 1471270 256 256 7097 57943 1632308 2065659 512 4 6880 7959 103017 131081 512 8 8136 11405 376170 758612 512 16 11156 23437 939486 144994 512 32 18728 30197 1242177 1044594 512 64 14392 30201 531055 977103 512 128 22002 71298 413549 662434 512 256 15257 43593 1625889 279154 512 512 18658 53482 1344020 1227971 1024 4 4694 7253 538904 142818 1024 8 8836 12031 377287 269482 1024 16 8901 22257 570774 522196 1024 32 20523 41929 774034 945443 1024 64 24980 23571 1281771 1167489 1024 128 24116 69460 1389594 1144163 1024 256 28223 70334 997946 1207534 1024 512 26135 72000 1684429 1386007 2048 4 5664 7800 296636 289840 2048 8 9739 7440 251103 266529 2048 16 15987 18451 701860 683161 2048 32 18678 26711 542951 359234 2048 64 19629 28848 409692 275196 2048 128 31336 61885 355546 647915 2048 256 31573 51359 466190 914717 2048 512 43904 82001 1793004 1617749 4096 4 7143 6683 429262 238527 4096 8 9022 18252 180343 675447 4096 16 12644 10573 242897 297287 4096 32 17764 16578 286834 503383 4096 64 21149 17176 841580 767033 4096 128 23768 63974 502015 582886 4096 256 27561 36072 412781 783903 4096 512 32902 53475 687943 643710 8192 4 6677 5097 281695 289345 8192 8 13211 13862 516774 446916 8192 16 2655 18117 625486 402160 8192 32 18869 30511 594440 623296 8192 64 23387 46775 614413 591310 8192 128 31208 42140 778271 541876 8192 256 26590 50109 572625 1027448 8192 512 54109 33831 461131 797509 16384 4 7924 8529 384077 315696 16384 8 16488 11856 260978 548532 16384 16 15770 19580 403525 498339 16384 32 20276 26523 684465 816050 16384 64 25300 32590 516145 434392 16384 128 25782 34218 660320 625633 16384 256 31176 33256 572024 563182 16384 512 46870 44057 900615 697696 32768 4 7150 8414 267286 270807 32768 8 13443 12573 465633 227538 32768 16 16226 26470 629945 447180 32768 32 21875 33206 816626 608099 32768 64 28264 40325 795590 522848 32768 128 38464 46089 1225472 696020 32768 256 32682 41402 947405 740185 32768 512 62980 57627 750442 565062 65536 4