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: Mon Aug 24 01:28:57 2026 Auto Mode Machine = Linux oleg612-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-oleg612-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 4342 13698 592827 409946 64 8 6441 18248 792299 695778 64 16 5016 24051 1124074 754443 64 32 4921 18217 247222 913649 64 64 6955 43684 1255511 1452528 128 4 5268 8411 618653 526444 128 8 9113 21610 559353 600657 128 16 10914 28673 590094 368779 128 32 8311 13553 1133103 291017 128 64 9199 61895 1319723 1303699 128 128 3421 74165 477725 2132084 256 4 3644 5484 569079 419790 256 8 13246 9259 453092 96387 256 16 12336 25900 418155 870974 256 32 19100 28796 1158540 937106 256 64 6880 54912 992545 1036624 256 128 18058 68522 221810 1368162 256 256 11960 95453 1471270 1985448 512 4 4886 2988 232617 418302 512 8 12171 7944 593915 602412 512 16 22141 19521 312370 911184 512 32 17487 36773 870905 520879 512 64 31372 35097 807687 1055894 512 128 38744 92668 756207 221531 512 256 28019 44157 1492545 807687 512 512 24774 90926 1605228 200703 1024 4 11339 4759 157516 151814 1024 8 15934 10999 428647 302062 1024 16 13151 19436 263384 846164 1024 32 14213 17917 758586 257155 1024 64 19283 22295 650969 876737 1024 128 30597 57563 756315 390849 1024 256 44477 91240 1659694 620946 1024 512 15776 30009 996094 1159609 2048 4 5308 4499 238749 230084 2048 8 9182 11755 800343 406339 2048 16 19416 21367 491955 290959 2048 32 21579 31118 1192912 613181 2048 64 20843 36168 1017426 760453 2048 128 33181 38168 1269047 243176 2048 256 16003 33237 726802 778722 2048 512 29838 57134 1558461 1447382 4096 4 5710 4759 185355 229478 4096 8 7459 8392 229800 479405 4096 16 14493 18809 879719 394306 4096 32 1451 33431 890803 934917 4096 64 21394 41955 464448 449125 4096 128 25906 37547 512070 494615 4096 256 31264 43635 309436 334754 4096 512 28143 51695 684026 715833 8192 4 7148 6768 409108 277825 8192 8 10190 11821 229584 221076 8192 16 14138 12951 724570 601211 8192 32 24407 27302 624679 601295 8192 64 27425 34625 967285 762333 8192 128 28906 30361 474399 670109 8192 256 27436 34633 887440 578127 8192 512 21550 43228 1031737 846887 16384 4 4983 5514 265813 98719 16384 8 10988 11741 500550 468420 16384 16 17439 23003 482151 578939 16384 32 22382 26544 705532 792796 16384 64 32414 34559 854318 643267 16384 128 28354 46776 669390 498904 16384 256 31673 51833 759643 671640 16384 512 26867 39800 857933 697668 32768 4 6165 7389 345445 366442 32768 8 12535 11433 502352 347678 32768 16 17216 16190 554910 478100 32768 32