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: Fri Oct 10 15:53:42 2025 Auto Mode Machine = Linux oleg338-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-oleg338-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 6179 15377 201255 256188 64 8 8391 28469 576282 343792 64 16 5769 18740 460591 440921 64 32 6775 56538 831569 463774 64 64 4316 67653 1124074 1363961 128 4 4199 15676 229059 233137 128 8 6027 15199 274641 321709 128 16 5606 49692 592699 566435 128 32 15802 67977 852438 809997 128 64 9457 22715 1048974 962469 128 128 7388 103050 1436229 1622919 256 4 7839 15425 161932 296629 256 8 9856 11402 398744 267779 256 16 11258 50672 467900 800221 256 32 12773 70152 847597 780445 256 64 22531 87668 1158540 1089202 256 128 21043 105095 1230218 1300235 256 256 14546 103685 1579483 340891 512 4 7997 11950 347163 187131 512 8 18613 21747 299058 386390 512 16 15738 25908 690996 593423 512 32 16535 41203 831132 816594 512 64 13502 81906 1075459 864942 512 128 40619 83988 1184618 1094088 512 256 29066 100416 1221684 1410215 512 512 22416 116332 1454140 1904125 1024 4 9768 12998 226757 224259 1024 8 23158 24733 445591 314009 1024 16 31471 35814 632840 343740 1024 32 30018 68822 1008017 815943 1024 64 26456 63932 890369 1111877 1024 128 30084 89926 1363565 1289855 1024 256 37245 81684 1617808 1471481 1024 512 40835 127157 1747480 1468964 2048 4 8891 9850 229721 258392 2048 8 22242 25870 285353 178474 2048 16 35054 39300 731942 284163 2048 32 44267 69138 672780 769307 2048 64 48940 73171 1232980 990787 2048 128 28639 100986 1421043 1229979 2048 256 68858 115995 1559876 1425997 2048 512 65708 66363 1673209 776048 4096 4 13791 14073 262513 206576 4096 8 16291 19168 196119 354349 4096 16 26127 28384 276422 289780 4096 32 33995 26912 1029178 733404 4096 64 39971 91481 706937 1021710 4096 128 51197 70855 1000003 1234469 4096 256 63481 91894 1181737 1106180 4096 512 43876 111686 1603675 1475958 8192 4 11470 10382 219079 223192 8192 8 14894 18273 172216 200523 8192 16 16905 27555 701551 341331 8192 32 35305 50230 620695 540623 8192 64 36846 62247 352043 528515 8192 128 42108 35640 676748 1058923 8192 256 41050 64931 1366039 985315 8192 512 44882 79873 1425194 1214691 16384 4 11250 11523 130718 130710 16384 8 20408 18387 358481 308503 16384 16 25833 30954 401619 409517 16384 32 43560 43417 647101 723867 16384 64 43349 64577 866610 574232 16384 128 60923 72869 1209790 993690 16384 256 42493 75643 1122650 1088490 16384 512 50877 68351 836046 1375302 32768 4 9790 9800 133962 131642 32768 8 17513 20435 332477 407770 32768 16 31217 29698 638491 349204 32768 32 40768 51018 839041 771722 32768 64 42719 63843 1238492 891402 32768 128 47986 65518 1366983 1020365 32768 256 53084 72893 871511 982901 32768 512 60320 66751 1718205 1244041 65536 4 12107 11745 237703 237549 65536 8 21467 23874 369591 339020 65536 16 30475 36974 360088 449156 65536 32 42299 48165 805010 507536 65536 64 48436 62041