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: Mon Jul 13 13:55:29 2026 Auto Mode Machine = Linux oleg610-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-oleg610-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 3405 9171 463774 429630 64 8 3566 18873 811459 799377 64 16 2203 44444 1101022 1163036 64 32 3945 36527 1304314 1119387 64 64 6118 62502 1638743 195111 128 4 5299 5843 564055 643108 128 8 4452 11081 718889 761728 128 16 11801 50673 1048974 670413 128 32 11954 16844 1406136 1206978 128 64 6961 77764 1278855 1424795 128 128 6179 40623 1377278 1579934 256 4 8036 8917 651223 625794 256 8 5349 22245 30705 856386 256 16 4317 16052 1292410 389064 256 32 10514 23102 154321 1274008 256 64 17758 101183 1391207 1292410 256 128 24518 71789 1514860 833776 256 256 25306 66150 1632308 2228578 512 4 4500 4441 319195 115781 512 8 4446 5504 483470 882718 512 16 18649 25113 394772 596721 512 32 11627 29990 531712 958781 512 64 10441 44599 1459080 782951 512 128 17212 75840 1619757 1414860 512 256 30448 100056 1514652 1718254 512 512 19812 78576 1413929 2152206 1024 4 7430 5321 128289 572753 1024 8 12025 15960 375900 646461 1024 16 17543 16982 378985 462729 1024 32 21236 31830 295271 445037 1024 64 21620 54488 1217461 1291406 1024 128 42663 77423 1007781 1072185 1024 256 27966 94990 1638796 814705 1024 512 57216 50728 1687075 603750 2048 4 7554 9685 511463 311288 2048 8 13420 14565 369732 428109 2048 16 19845 20108 310635 872534 2048 32 28971 34399 955732 744503 2048 64 21157 39806 650762 947718 2048 128 31514 58854 803788 415337 2048 256 37778 46185 814999 1425288 2048 512 46340 60871 1802788 923767 4096 4 7375 6719 360976 352250 4096 8 13494 11532 651275 359458 4096 16 13487 21546 636437 531262 4096 32 28279 27783 674333 736296 4096 64 27669 52169 1535863 402831 4096 128 28634 39284 554425 614734 4096 256 29576 53284 1589432 677926 4096 512 40846 36077 755564 1277997 8192 4 4863 7299 222766 390821 8192 8 9883 11025 364932 205653 8192 16 19477 19691 416836 302724 8192 32 21588 23660 399203 348830 8192 64 25840 31899 1014974 946502 8192 128 32455 44403 1470199 919304 8192 256 39107 55659 1256214 631707 8192 512 34379 77356 581650 560017 16384 4 7264 8336 285824 273495 16384 8 12205 11871 674323 284810 16384 16 17906 15648 491777 382793 16384 32 26167 31236 1022340 817935 16384 64 23435 45223 542782 863637 16384 128 34834 38815 1009559 704751 16384 256 33798 43409 594763 703568 16384 512 26131 51593 1253826 414953 32768 4 6525 8934 303561 301836 32768 8 13563 11385 416895 385179 32768 16 19262 16456 791039 488541 32768 32 24294 28897 1078284 757115 32768 64 31955 45587 1195133 666992 32768 128 33967 59106 896326 876782 32768 256