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 Sep 13 22:06:49 2026 Auto Mode Machine = Linux oleg334-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-oleg334-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 3270 6916 376589 538156 64 8 3294 15013 69187 771797 64 16 4774 47170 1105556 983980 64 32 4533 18745 1304314 852702 64 64 5241 50669 889431 1722886 128 4 5266 7977 659704 120083 128 8 12036 21025 444501 735635 128 16 7626 17934 921183 715059 128 32 4660 34007 564055 934004 128 64 8475 22918 1185654 334956 128 128 6467 79163 1359835 771581 256 4 6149 6278 557844 226346 256 8 8762 13236 416210 666586 256 16 6688 14065 182460 947860 256 32 7108 24904 1084800 486559 256 64 11872 70345 536654 1075025 256 128 26283 54134 409074 680960 256 256 17041 61273 1262029 1512726 512 4 8775 11054 550523 91820 512 8 11554 13496 925717 605982 512 16 13196 17243 555938 629058 512 32 25878 33624 333573 638408 512 64 18067 77015 1527582 1019791 512 128 24071 61583 346155 747521 512 256 38746 80301 680055 1406520 512 512 31694 74799 1430887 2246778 1024 4 9706 7835 597452 179182 1024 8 12153 14022 360080 376065 1024 16 16196 26842 1012055 778665 1024 32 20134 42779 302509 993100 1024 64 22209 95211 1882266 387429 1024 128 41845 128692 1582636 419848 1024 256 38416 109156 794510 598451 1024 512 34384 94594 1294910 1736178 2048 4 8412 11419 545260 546718 2048 8 14068 11802 499130 438624 2048 16 25792 26317 634420 695890 2048 32 26796 39266 857980 875201 2048 64 37338 42888 1102290 612219 2048 128 42674 60665 590381 1630647 2048 256 39372 93897 1692662 546996 2048 512 72598 82723 976705 861163 4096 4 9075 10104 366372 269493 4096 8 17711 23455 659374 610626 4096 16 23512 23820 1060629 433028 4096 32 30652 37562 873502 463821 4096 64 39407 43882 741380 610431 4096 128 36696 44602 1673993 827634 4096 256 50451 66098 782439 634932 4096 512 54941 64471 723033 1563966 8192 4 9252 7928 498055 351528 8192 8 14291 15469 505395 350056 8192 16 22110 28913 570865 356049 8192 32 32103 28173 953779 795957 8192 64 29571 53335 836353 354495 8192 128 38993 68358 1190697 322037 8192 256 36877 86278 729741 829148 8192 512 41393 81624 1455316 900912 16384 4 9425 9672 477056 422647 16384 8 16540 19719 642785 629571 16384 16 26796 28396 862770 371434 16384 32 35821 53330 804990 502192 16384 64 47669 59304 1290584 793254 16384 128 47892 52498 811885 650316 16384 256 50083 58412 681870 582917 16384 512 55112 76624 999340 673187 32768 4 8814 8931 412212 498849 32768 8 13985 15182 332595 311859 32768 16 19344 20889 765749 524280 32768 32 26192 31712 939337 604284 32768 64 30198 43832 945632 570104 32768 128 49270 68004 662903 638153 32768 256 47644 65620 734826 770536 32768 512 46230 67528 880811 883597 65536 4