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 Aug 26 18:34:53 2026 Auto Mode Machine = Linux oleg135-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-oleg135-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 1133 3762 491815 538156 64 8 2440 7178 874936 969761 64 16 3504 17405 831569 1183548 64 32 4268 56148 1279447 727850 64 64 4378 23810 1226821 1947927 128 4 2956 8262 652488 355589 128 8 6002 9800 365764 761728 128 16 8217 34362 1319723 1102844 128 32 7490 48193 1363288 1102844 128 64 8797 87971 1363288 1000121 128 128 6991 59475 1406136 2066432 256 4 6392 8453 587127 606357 256 8 6548 19708 962301 913973 256 16 9502 32728 705107 1066483 256 32 13479 46184 1447470 706964 256 64 13842 52935 546765 1321031 256 128 13582 57580 1108314 1487577 256 256 15105 103565 1430119 1694118 512 4 7490 8246 165959 497585 512 8 5450 8569 622855 103245 512 16 10867 17513 844865 948197 512 32 23586 56756 1221684 1032044 512 64 22624 54836 462938 709254 512 128 26604 62181 1635797 645703 512 256 15431 55761 1778004 1096322 512 512 24671 96240 1778004 2265742 1024 4 7823 10835 354346 249637 1024 8 14827 16099 662823 499309 1024 16 22633 16668 499542 348991 1024 32 13734 22311 1317957 1091809 1024 64 8135 20533 720051 834491 1024 128 27236 41991 1220575 885048 1024 256 16036 92353 464631 1565902 1024 512 15200 85783 1753902 1258117 2048 4 4575 8544 147040 179981 2048 8 11643 10316 356298 269760 2048 16 9642 9723 233043 444158 2048 32 29159 19559 793468 338175 2048 64 17615 17506 404026 619281 2048 128 12207 27748 854056 210724 2048 256 25549 47765 1070556 1531781 2048 512 32296 53141 371202 225405 4096 4 5292 5800 152562 113005 4096 8 11547 8003 437282 314109 4096 16 13016 13141 343887 645233 4096 32 18025 23053 578294 689102 4096 64 35014 32934 442326 372674 4096 128 27242 38416 1587083 683699 4096 256 28927 33812 1665715 534652 4096 512 45285 68519 1099595 1303202 8192 4 5635 2329 606507 239279 8192 8 14938 18825 774953 370980 8192 16 17183 14796 707066 306586 8192 32 21154 25222 562326 626593 8192 64 27782 32844 1025424 406692 8192 128 42005 41467 982498 921993 8192 256 40611 43817 566722 440143 8192 512 34615 47282 1300135 972570 16384 4 7282 6916 238340 336495 16384 8 9900 14195 527682 321192 16384 16 13978 23756 1014432 631950 16384 32 15153 17453 679463 299491 16384 64 21328 32699 1015376 709136 16384 128 29852 31716 720459 840895 16384 256 32711 35217 1254421 758411 16384 512 38732 44834 650858 473376 32768 4 6170 5391 282909 137106 32768 8 11158 10049 301456 331986 32768 16 14342 17471 457776 376064 32768 32 26763 45296 766322 773415 32768 64 27767 33778 568710 417693 32768 128 35030 37484 595391 535538 32768 256