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: Tue Aug 25 07:59:55 2026 Auto Mode Machine = Linux oleg615-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-oleg615-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 3121 7515 349613 195680 64 8 3674 12701 134769 627470 64 16 2034 29727 877797 418250 64 32 3584 37734 666414 1049372 64 64 2970 53969 282919 1562436 128 4 7602 10990 468962 551878 128 8 3349 18205 688467 735635 128 16 5503 48595 1048974 1017175 128 32 9916 70875 1332828 1000121 128 64 9507 98385 1471662 1269781 128 128 13035 70605 789741 940549 256 4 4305 8125 496228 412215 256 8 7339 23425 398744 408297 256 16 12568 39664 1012194 934659 256 32 14965 53166 1206714 1118707 256 64 15180 47682 656399 533190 256 128 9663 124812 1591186 389064 256 256 18037 86072 1673001 2210228 512 4 5222 3734 118600 343883 512 8 12010 18201 463738 398804 512 16 15042 20859 593259 510478 512 32 9582 32386 1514652 1094088 512 64 15960 56888 723105 689886 512 128 24672 53690 909255 1492545 512 256 26521 103684 1797349 1718254 512 512 39402 106180 1240025 267206 1024 4 6876 7124 362848 582146 1024 8 15990 13908 672791 440247 1024 16 9808 25408 835953 826462 1024 32 20322 71235 699414 871578 1024 64 25514 50481 1291406 1111589 1024 128 29662 55914 296208 1107005 1024 256 24298 66402 1061060 1080275 1024 512 44009 66814 1321607 1068983 2048 4 5662 7963 469092 438534 2048 8 13426 13614 456430 182450 2048 16 17271 19434 394688 723923 2048 32 24333 22250 361258 304124 2048 64 32551 48805 452201 650565 2048 128 40108 53208 978485 1122749 2048 256 40071 44261 1512630 795304 2048 512 29444 51190 1162403 294975 4096 4 5962 6269 343536 206640 4096 8 11271 13692 466086 222318 4096 16 17633 21835 687475 339383 4096 32 24516 24848 749498 711711 4096 64 32739 38396 870933 916709 4096 128 46381 72192 1278758 778256 4096 256 29276 52129 476770 559262 4096 512 39156 62016 1799541 1065298 8192 4 9463 6573 211865 229706 8192 8 9841 10802 370980 357151 8192 16 17257 20201 716771 638599 8192 32 19368 34883 762181 351874 8192 64 23437 32983 1120969 639348 8192 128 32868 35904 547044 832947 8192 256 28021 53055 943876 1128220 8192 512 44394 44498 1129630 888518 16384 4 6881 7126 251639 286663 16384 8 9187 12138 283175 271159 16384 16 14742 16065 299458 243638 16384 32 18566 22463 630952 459502 16384 64 22593 40933 635310 410677 16384 128 28633 33235 688780 564673 16384 256 27586 51099 596498 301404 16384 512 34754 51973 672186 661630 32768 4 5091 6108 324451 269403 32768 8 8841 11945 479737 397509 32768 16 16417 18094 459573 531656 32768 32 24172 36748 471556 744152 32768 64