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: Sun Nov 16 20:17:12 2025 Auto Mode Machine = Linux oleg113-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-oleg113-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 2344 5152 278227 82906 64 8 3428 28242 338589 457452 64 16 2339 36950 532815 484710 64 32 6117 61897 799377 367817 64 64 7201 70018 1033216 217567 128 4 7546 6330 139599 174150 128 8 8874 22065 382167 393656 128 16 6003 57685 535368 477301 128 32 8639 63021 748976 369032 128 64 11569 86191 156668 1032829 128 128 6323 105252 1663139 1162547 256 4 6461 17180 239204 264415 256 8 7272 9868 396828 376512 256 16 11545 14459 534251 461267 256 32 19571 28584 768712 585845 256 64 20567 86894 913973 737558 256 128 12494 104157 316103 1158540 256 256 24736 121329 1219045 1598292 512 4 5433 5456 241051 201191 512 8 16668 15539 129391 231240 512 16 8890 11721 502005 532767 512 32 20586 19877 555938 640694 512 64 14412 108888 712076 763195 512 128 19042 134244 1261144 997991 512 256 31026 110366 1506154 1333173 512 512 30124 52464 351423 1917728 1024 4 10724 7487 198870 199647 1024 8 17668 21798 291741 389643 1024 16 30837 40423 580181 561081 1024 32 31391 57053 704808 521372 1024 64 24443 37720 796277 929886 1024 128 38227 97312 788240 840698 1024 256 27433 93772 1376236 735590 1024 512 32538 81645 1015885 1232130 2048 4 9402 12292 222728 146746 2048 8 15197 12469 430879 194788 2048 16 23038 42356 278597 222826 2048 32 34326 31596 765059 423403 2048 64 48789 59004 1145354 874132 2048 128 32231 39170 1325646 1134613 2048 256 23809 80153 1461916 434629 2048 512 33367 44862 760722 1371798 4096 4 6221 7158 84170 190724 4096 8 17601 10781 430165 181102 4096 16 16740 25445 365289 214371 4096 32 29579 51443 325908 307646 4096 64 22513 38951 1122808 739211 4096 128 18200 44444 471239 1214742 4096 256 25585 33998 587671 1216204 4096 512 24488 45665 1676607 750186 8192 4 8454 7649 103938 194441 8192 8 19283 17859 400021 326831 8192 16 17531 17541 502608 491803 8192 32 21161 30988 795957 741761 8192 64 32821 45420 612027 422593 8192 128 35403 44578 1069304 655047 8192 256 34470 41287 607043 554566 8192 512 42729 60910 1014734 654573 16384 4 6596 9545 224949 193168 16384 8 13905 17662 244383 266962 16384 16 19084 23527 264142 446796 16384 32 31584 32289 491201 461000 16384 64 44421 51575 568315 552394 16384 128 45189 70234 585684 677440 16384 256 46182 79313 1339331 997252 16384 512 47994 69687 1134624 926965 32768 4 8005 10747 100813 89702 32768 8 15646 17710 240642 235030 32768 16 18270 25156 257433 359089 32768 32 21392 41797 263171 431469 32768 64 36407 29134 479197 459462 32768 128 40489 66390 622515 766428 32768 256 46939 36133 473950 316862 32768 512 39430 43024 475380 923017 65536 4