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 Jun 1 14:09:58 2026 Auto Mode Machine = Linux oleg310-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-oleg310-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 3626 2997 456673 621657 64 8 1684 4283 438043 610350 64 16 2925 13527 901377 647135 64 32 2387 24032 1017549 926260 64 64 1267 28701 1017549 1780008 128 4 2260 5729 630273 650117 128 8 2601 2877 334123 120867 128 16 9668 29738 1231904 673778 128 32 2679 54012 1185654 883293 128 64 6404 23857 1133103 1240443 128 128 6551 22783 1455701 1939522 256 4 4475 13505 252954 160504 256 8 6917 4377 518263 460476 256 16 6391 13828 121562 437582 256 32 6650 29728 792543 116624 256 64 12778 53399 1400278 1044693 256 128 16995 41051 1455317 1514860 256 256 16936 84882 1126926 1985448 512 4 7411 10808 406966 392966 512 8 5665 8513 174509 804962 512 16 5737 14646 1216149 690774 512 32 11909 10390 1402845 1145443 512 64 6206 32054 1233614 184431 512 128 11967 26200 1406520 671129 512 256 10354 42391 1610042 882718 512 512 19099 29967 1565443 1570020 1024 4 4103 4829 649688 152019 1024 8 5774 5676 836604 698959 1024 16 6015 9662 400134 268137 1024 32 13692 19396 1117955 977950 1024 64 14500 20350 83686 1117955 1024 128 12561 24109 1357961 1258117 1024 256 17445 65037 836604 590876 1024 512 31198 31106 285307 737231 2048 4 2897 4976 182936 261228 2048 8 7317 5603 148664 262666 2048 16 12617 19443 774649 373592 2048 32 14775 35075 715302 251964 2048 64 30449 25106 505414 209343 2048 128 11482 40680 1563282 506070 2048 256 35889 73871 356180 953398 2048 512 16869 46592 743923 439297 4096 4 4678 5286 108552 158067 4096 8 7132 10480 368209 488608 4096 16 9451 16765 341501 278831 4096 32 16854 28305 702572 722790 4096 64 25064 31134 496846 658414 4096 128 23700 22253 964196 362285 4096 256 40904 49589 822798 409065 4096 512 27795 58798 878055 679266 8192 4 4667 4692 444131 436043 8192 8 6192 8687 315308 407623 8192 16 14675 14765 346062 501684 8192 32 12609 16496 558723 412260 8192 64 12421 21418 1008480 560867 8192 128 20191 22513 326688 251248 8192 256 35496 45179 894137 737890 8192 512 44494 44574 801640 738747 16384 4 3746 3558 206438 242661 16384 8 7412 8210 411255 707581 16384 16 14563 18718 714928 918073 16384 32 18611 32983 756415 970219 16384 64 29067 42707 467432 701614 16384 128 25647 38374 1116086 1041901 16384 256 34596 38194 1209513 923303 16384 512 34225 34688 380643 295804 32768 4 5557 6658 245477 353457 32768 8 10101 11544 319320 401913 32768 16