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 Sep 5 19:31:30 2026 Auto Mode Machine = Linux oleg343-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-oleg343-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 6650 9528 581273 546928 64 8 2444 19650 874936 763021 64 16 4770 30947 1124074 939223 64 32 4503 54330 1188789 1163036 64 64 6272 91031 1363961 1734015 128 4 5576 10926 595328 533241 128 8 6923 22319 744820 498114 128 16 5488 46835 948860 378663 128 32 9967 69906 164744 881842 128 64 12360 78058 889145 1346196 128 128 12267 99295 1455701 1162547 256 4 10124 15393 618227 538809 256 8 6110 8070 357579 76900 256 16 14328 30335 1168627 904732 256 32 15843 46174 1422540 1052888 256 64 9654 49738 1391207 1093639 256 128 26023 71890 249023 1570244 256 256 13915 88733 1391207 1855098 512 4 11947 10488 627404 314520 512 8 8359 9666 768658 764009 512 16 23332 36066 779258 1066380 512 32 20412 27413 671969 423082 512 64 15706 75528 1103647 1842059 512 128 20310 24261 1467055 1213400 512 256 26917 117645 1575781 1650887 512 512 19927 73173 1433753 1815584 1024 4 8621 12505 308329 293918 1024 8 17872 16810 550579 276313 1024 16 16884 36579 546099 608800 1024 32 21460 47350 1219189 479841 1024 64 29036 57142 1418039 516420 1024 128 43103 74738 1088213 755782 1024 256 43124 93491 1358390 1060013 1024 512 35639 99051 1492445 1625154 2048 4 8005 11335 552165 219529 2048 8 11987 15999 504554 393928 2048 16 18691 28980 377019 501461 2048 32 27118 29642 1360931 1190763 2048 64 45143 41438 1027159 771656 2048 128 39247 35908 1597590 1388428 2048 256 39214 66640 701402 452893 2048 512 34641 38758 1346425 1261221 4096 4 8375 11083 188417 204024 4096 8 10337 25722 316709 177801 4096 16 16113 21908 677364 696590 4096 32 26773 34192 732217 504432 4096 64 20569 35132 1498226 1012140 4096 128 32323 44138 620149 665813 4096 256 27376 45155 1030907 515930 4096 512 37685 34872 280104 540301 8192 4 8008 4877 380810 344145 8192 8 2348 11685 242058 533297 8192 16 22988 12403 792707 558951 8192 32 19613 22546 462902 332078 8192 64 21089 24958 772844 733777 8192 128 37824 39376 972790 437749 8192 256 33547 43005 386195 597219 8192 512 31262 64502 445606 705353 16384 4 5804 7353 272553 373246 16384 8 9874 12324 218479 270335 16384 16 22778 26789 297312 453086 16384 32 25779 32541 841327 522781 16384 64 29353 51902 777265 391194 16384 128 32841 48201 1136031 660060 16384 256 34448 44105 873262 1039191 16384 512 34302 76594 556505 478865 32768 4 6972 8111 233726 227303 32768 8 13552 13871 701774 681217 32768 16 20735 25379 464991 708635 32768 32 24863 33707 731821 542281 32768 64 29925 36436 446704 476646 32768 128 39010 55825 673628 493985 32768 256 33108 52588 826433 684880 32768 512 38520 64752 936763 688114 65536 4