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 12 16:25:00 2026 Auto Mode Machine = Linux oleg401-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-oleg401-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 2544 5164 621657 297664 64 8 2045 25570 512471 695778 64 16 5720 19036 1066042 831569 64 32 6237 30752 1138375 821391 64 64 3398 63045 1066042 1722886 128 4 3411 4339 301985 441576 128 8 8703 15570 901083 39225 128 16 10120 19962 624409 699227 128 32 7213 37079 1048974 814915 128 64 6721 24563 175573 826202 128 128 3481 27020 1424795 1911894 256 4 3603 10014 368881 486559 256 8 12554 17701 842278 695516 256 16 10433 34408 181289 873809 256 32 20635 42447 1254656 1175022 256 64 16444 87732 1415041 624339 256 128 10974 59842 1254656 1292410 256 256 15375 60262 1729594 2533571 512 4 8692 5188 207450 471476 512 8 13522 8492 882718 536092 512 16 9850 27100 1080328 397549 512 32 23552 28381 1309596 1127402 512 64 16703 72061 1350783 1171052 512 128 24578 37730 1379416 1316016 512 256 12139 53668 595397 1410215 512 512 19064 87943 1484293 2124526 1024 4 5130 7646 516110 353850 1024 8 9817 9687 224317 837257 1024 16 9305 24058 256894 988301 1024 32 17982 40862 1514549 1111589 1024 64 26249 45543 612446 260099 1024 128 19763 31457 1439908 1162433 1024 256 46492 50728 1083546 891292 1024 512 23488 95478 527067 362481 2048 4 9448 8567 399684 188145 2048 8 13993 14816 454498 340764 2048 16 18770 30003 574162 439589 2048 32 25259 37045 515206 703297 2048 64 25269 35872 698493 1206823 2048 128 28830 40216 356668 289673 2048 256 34674 51469 881669 676809 2048 512 49451 91937 751012 589854 4096 4 6695 8141 323972 323313 4096 8 10628 15623 472327 356297 4096 16 17517 23061 294823 856005 4096 32 20561 26675 751268 513724 4096 64 25017 43626 283226 966692 4096 128 27593 45233 1585033 451308 4096 256 37435 74349 984869 641906 4096 512 37338 72584 395095 731033 8192 4 2277 7175 505931 386469 8192 8 13529 12890 356981 410791 8192 16 17543 18516 643166 506267 8192 32 16170 32282 674966 391533 8192 64 21792 47998 581611 574387 8192 128 22405 41702 1023744 497147 8192 256 43312 72769 1197128 1034750 8192 512 59850 71051 741697 698627 16384 4 7026 7237 388494 397505 16384 8 12122 12305 653004 228973 16384 16 16204 20887 504337 552465 16384 32 23443 27803 874140 630564 16384 64 32256 45186 663476 550077 16384 128 35852 37970 1200994 811406 16384 256 42977 56183 1258372 933285 16384 512 43317 62295 525483 511553 32768 4 6794 8003 448053 299634 32768 8 12689 13796 679863 429620 32768 16 16029 16702 777762 629813 32768 32 24338 26156 526495 589098 32768 64 29261 32783 649627 388398 32768 128 31849 43675 679254 585205 32768 256 44211 75520 621207 478833 32768 512