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 Apr 14 16:42:56 2026 Auto Mode Machine = Linux oleg325-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-oleg325-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 2466 6598 404998 529661 64 8 7363 33006 178741 780776 64 16 3162 18151 842003 686877 64 32 5043 42294 735831 1232453 64 64 5435 75386 1690338 123090 128 4 5977 17579 662962 544601 128 8 3211 16962 883293 727658 128 16 10179 38519 1065630 819893 128 32 6041 67018 1349580 1022989 128 64 4270 91494 1377278 1471662 128 128 7084 65609 1637771 1206978 256 4 4387 2779 400081 518263 256 8 7742 22942 638445 228611 256 16 10580 22737 447615 996229 256 32 12595 40231 1084800 282206 256 64 12868 21945 478536 1044693 256 128 6058 37597 1212164 1361224 256 256 7563 110720 1514860 1752173 512 4 6474 3171 209657 563376 512 8 5262 29532 349536 519241 512 16 11845 13157 904658 157928 512 32 25692 66338 169255 757541 512 64 25131 40699 436143 1049187 512 128 12407 63580 1422357 1108203 512 256 14741 24825 813808 570258 512 512 18349 40343 828566 990625 1024 4 4174 3615 154752 182626 1024 8 10914 5628 106480 189800 1024 16 7838 18305 97708 484387 1024 32 25820 33930 740408 546655 1024 64 30202 36760 1349004 397984 1024 128 28478 40869 1412443 829175 1024 256 28026 85226 1799462 1473500 1024 512 32954 68462 1291406 472088 2048 4 15467 10402 469400 166301 2048 8 19852 25037 879052 364153 2048 16 28689 28607 347183 180253 2048 32 25640 44659 508556 1129094 2048 64 25263 35640 1015862 502106 2048 128 18856 36482 712100 561110 2048 256 25410 45623 1283841 267993 2048 512 48631 57797 752657 999549 4096 4 5661 7255 205964 210471 4096 8 10455 16084 483017 456076 4096 16 20148 22266 712331 600069 4096 32 24773 37566 367713 218779 4096 64 19627 33254 700652 321024 4096 128 21476 34012 1328600 313170 4096 256 21565 58404 936650 879179 4096 512 35307 65000 1520368 1005917 8192 4 8350 1943 305444 217692 8192 8 10260 15207 301253 235992 8192 16 17203 19725 298900 395326 8192 32 21459 30803 607354 476412 8192 64 28443 33687 382711 502300 8192 128 33109 39353 559524 531499 8192 256 33417 39089 1426437 853874 8192 512 43962 49077 1032139 735238 16384 4 7875 8754 219598 238351 16384 8 11312 12368 407957 303048 16384 16 14353 20541 553886 284568 16384 32 26323 44629 512255 535758 16384 64 24357 37481 834219 1188716 16384 128 34407 114490 956059 546060 16384 256 36342 41753 1179049 470588 16384 512 39884 54745 1267517 919105 32768 4 7228 8601 183481 220316 32768 8 10933 15958 519565 360190 32768 16 16972 18087 295143 341799 32768 32 21037 25024 730581 345038 32768 64 25249 39653 493605 607906 32768 128 37993 48382 751542 405659 32768 256 36150 57106 1003769 871119 32768 512 35574 64831 967206 738201 65536 4