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: Wed Sep 30 11:02:33 2026 Auto Mode Machine = Linux oleg101-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-oleg101-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 2835 6793 27560 557144 64 8 2099 7106 799377 653436 64 16 1729 8147 799377 1363961 64 32 2152 38972 1013707 1002351 64 64 4552 71112 842003 1492919 128 4 4354 5584 637004 581781 128 8 5523 11042 831319 819893 128 16 7774 14675 1093856 870405 128 32 5983 44169 475609 1231904 128 64 9032 44078 1377278 739689 128 128 16353 48302 940549 1663139 256 4 3009 10658 651223 540164 256 8 8213 17733 531080 797250 256 16 9147 21525 1058076 891956 256 32 3435 28378 809878 1208072 256 64 12832 11478 1729594 635047 256 128 6823 50744 1487577 1075025 256 256 13372 53412 1479379 2305128 512 4 4388 5559 406658 439895 512 8 6570 18907 691887 803757 512 16 14701 26103 522399 891884 512 32 17558 49032 1524329 1062161 512 64 7688 16860 1325766 449941 512 128 24622 37891 1533034 1376763 512 256 16244 34035 1060063 1496706 512 512 21933 58227 1679288 1624659 1024 4 8201 6583 802526 386731 1024 8 8606 20271 367946 944612 1024 16 13270 14358 614989 321195 1024 32 20626 45857 238294 1090700 1024 64 28563 27446 282103 898941 1024 128 25518 36602 1473500 1270397 1024 256 19162 55573 231051 1444266 1024 512 51397 77184 2085132 1140517 2048 4 12274 7006 231779 131206 2048 8 8933 9728 900619 763088 2048 16 19520 22740 476720 201458 2048 32 13307 45442 570009 682238 2048 64 26332 26337 1200414 356609 2048 128 36076 48706 319603 865588 2048 256 47269 87968 1098203 527287 2048 512 35524 58764 404331 516911 4096 4 5423 3650 287136 206471 4096 8 17266 12687 568666 307025 4096 16 12474 17874 385252 190165 4096 32 45183 13733 413068 303741 4096 64 16090 21167 1034071 540301 4096 128 53192 54701 1337703 1069144 4096 256 26605 31957 1165621 812870 4096 512 31581 56445 504684 632198 8192 4 5048 9221 284791 347605 8192 8 2449 23771 700592 634402 8192 16 17628 21308 1302353 483818 8192 32 35167 55530 987240 940440 8192 64 53366 50677 418068 766260 8192 128 34919 46022 806930 401451 8192 256 21400 64008 1173977 303633 8192 512 40690 42841 557581 915507 16384 4 6632 9709 222288 206662 16384 8 9286 14206 332859 278279 16384 16 12655 32144 1136200 488794 16384 32 25824 28836 884661 522534 16384 64 38256 30102 376557 524773 16384 128 38761 56735 448420 459386 16384 256 27545 57056 973214 1206921 16384 512 33952 39500 977742 1153305 32768 4 7677 5048 187178 143369 32768 8 10638 9172 564526 583308 32768 16 12959 12215 515908 513911 32768 32 11961 17036 1036603 485538 32768 64 14127 21980 388205 403019 32768 128