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: Thu Jun 11 19:38:13 2026 Auto Mode Machine = Linux oleg409-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-oleg409-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 3996 10469 208444 926260 64 8 7335 19655 280553 688639 64 16 7893 34187 133033 801764 64 32 7472 55798 507625 1013707 64 64 3807 19488 799377 1690338 128 4 3493 4115 28914 247542 128 8 10391 10751 680612 643880 128 16 9601 20476 1162547 386570 128 32 17839 74422 1451764 1111981 128 64 8989 100166 1114289 1377278 128 128 11737 113077 744820 1827299 256 4 3467 2406 644965 413485 256 8 9526 16238 924200 766517 256 16 11671 10586 257565 889002 256 32 6968 29117 1407621 1178892 256 64 11096 40526 1292410 1132871 256 128 13338 75942 1471270 1007446 256 256 17776 36142 714967 214928 512 4 4226 7457 489086 245938 512 8 13173 20873 460062 411884 512 16 14476 33162 1122687 667582 512 32 9912 32734 1289930 1118011 512 64 19613 40333 1447280 1152822 512 128 12622 89966 373683 1380303 512 256 33032 122841 1835760 238800 512 512 27206 86718 1488408 966113 1024 4 9354 9303 599202 167289 1024 8 7462 16413 708178 308240 1024 16 14560 25810 671109 751813 1024 32 15522 62942 651858 292317 1024 64 20496 52726 783494 652650 1024 128 16536 61127 1232130 277886 1024 256 24123 85148 425800 723691 1024 512 32219 39439 1546729 1430318 2048 4 5283 5873 271869 179586 2048 8 8237 11275 663632 337962 2048 16 11861 19976 315125 346944 2048 32 23587 30175 474639 631714 2048 64 26433 34980 408775 426049 2048 128 24376 50435 1622945 768756 2048 256 30249 32240 1028142 816548 2048 512 29905 61136 1768638 1576480 4096 4 6166 5628 222258 123952 4096 8 7532 9972 388730 292111 4096 16 13031 17517 579758 337423 4096 32 14326 18140 306423 347912 4096 64 22329 27924 617896 883519 4096 128 32346 1629 902787 544963 4096 256 25435 54025 416090 198825 4096 512 52506 35602 627258 485886 8192 4 4368 5133 344462 325879 8192 8 7127 8691 341047 177365 8192 16 17279 14714 236373 321155 8192 32 13787 18293 956115 684432 8192 64 25443 26606 878792 461416 8192 128 46319 37325 801023 566797 8192 256 26091 33931 425714 939874 8192 512 25231 45135 244858 388949 16384 4 5550 4787 207120 525600 16384 8 6519 6960 481414 345480 16384 16 18827 18154 306712 412913 16384 32 24257 31045 703719 703265 16384 64 33517 41027 839939 638402 16384 128 34267 41380 783585 477278 16384 256 34870 48150 890589 861774 16384 512 35704 47464 427480 683070 32768 4 5137 5394 238908 204265 32768 8