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: Sat Aug 8 04:40:00 2026 Auto Mode Machine = Linux oleg234-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-oleg234-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 3038 11265 546928 459802 64 8 6375 15194 743988 218452 64 16 5444 37910 557144 488236 64 32 2661 20189 171108 866463 64 64 6043 53560 1066042 1562436 128 4 6126 5827 535903 424133 128 8 4458 16058 84098 687585 128 16 7320 25578 1022989 533241 128 32 15477 36068 150055 537512 128 64 5108 42467 1085013 533241 128 128 8941 69906 1471662 1508887 256 4 6084 3631 590031 472430 256 8 3176 12617 714967 343618 256 16 11878 32020 768712 842278 256 32 5705 48678 1495866 917880 256 64 3820 39451 464661 418971 256 128 8646 114742 1212164 1152323 256 256 16487 79898 917880 2187712 512 4 5258 5816 667582 527921 512 8 8470 13411 887461 512549 512 16 19525 37139 1205228 788992 512 32 38638 68854 301875 840566 512 64 14384 22824 1077618 1010197 512 128 14569 73625 137002 1125040 512 256 26416 61156 1518938 1376763 512 512 18390 80554 1450212 1809465 1024 4 3674 5760 311640 120723 1024 8 8586 8593 650180 143314 1024 16 16927 27342 752340 72214 1024 32 19181 31074 548190 1082454 1024 64 15667 42945 769872 633213 1024 128 24970 49464 519795 464631 1024 256 25657 63761 583491 1267398 1024 512 33529 45787 1464956 842843 2048 4 5456 6849 350755 270866 2048 8 10224 20312 728590 443195 2048 16 15268 15901 1067230 970635 2048 32 14720 31426 540356 520040 2048 64 21287 41987 793175 1087085 2048 128 25480 31081 621746 461903 2048 256 36839 42545 221642 663632 2048 512 30581 60237 454811 653087 4096 4 4021 4531 171907 98997 4096 8 8747 1134 565577 593190 4096 16 12776 22988 486161 444018 4096 32 40431 18836 573909 246285 4096 64 17929 24532 637405 564722 4096 128 25357 26405 1571117 505679 4096 256 31839 33108 540522 1107963 4096 512 22698 26113 256753 315419 8192 4 2593 4096 298099 303553 8192 8 12317 12188 310210 267457 8192 16 7723 29128 698797 562483 8192 32 31050 36619 1158695 414553 8192 64 25084 36096 561517 217334 8192 128 20361 27010 780711 289009 8192 256 16560 37615 782792 697308 8192 512 27513 75803 748401 894603 16384 4 7508 6248 299656 265237 16384 8 8604 11831 831544 268089 16384 16 13413 16449 426167 320363 16384 32 16902 29531 1238036 663265 16384 64 21351 30008 974070 644915 16384 128 28733 37388 942811 679436 16384 256 36925 41488 1129236 1035730 16384 512 26717 34196 479038 561521 32768 4 6538 4812 144780 159238 32768 8