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 12:30:00 2026 Auto Mode Machine = Linux oleg347-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-oleg347-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 5145 8482 608965 598110 64 8 2097 4035 435202 695778 64 16 2947 45003 1183548 1066042 64 32 4826 46371 1421755 325058 64 64 4389 69872 1087638 1780008 128 4 6093 12650 604036 609522 128 8 7519 15655 624409 280086 128 16 4964 49025 1152564 1048974 128 32 14818 75384 1319723 1065630 128 64 14562 43240 1231904 1332828 128 128 10116 48428 1579934 895074 256 4 8940 11602 231469 472430 256 8 12028 25306 928195 877379 256 16 8872 26831 504861 1044693 256 32 13612 48046 856386 475147 256 64 10875 102350 1514860 1347557 256 128 23688 103186 1445521 357460 256 256 9774 70428 203329 2045979 512 4 5896 8027 725058 241757 512 8 11694 15793 168089 54549 512 16 12081 13710 1227971 1127995 512 32 12033 56011 526240 192120 512 64 27845 38935 1300082 973559 512 128 11788 56499 1239310 731480 512 256 20717 89793 1015932 1795846 512 512 15132 80187 286835 575917 1024 4 5484 6329 305935 290498 1024 8 15221 24379 883591 651363 1024 16 28431 26041 909410 252336 1024 32 26223 18854 586439 859714 1024 64 25669 50614 1456510 564473 1024 128 21174 65847 1153071 1051192 1024 256 39934 95089 654740 204680 1024 512 41439 75885 1193442 731455 2048 4 6549 5798 456746 284596 2048 8 11289 10898 513543 310579 2048 16 16593 25924 627836 467891 2048 32 23606 26616 554733 391433 2048 64 32890 30071 761059 339351 2048 128 33788 57627 929163 456721 2048 256 34012 54476 1590196 586471 2048 512 41473 88958 1747411 1880538 4096 4 6067 8024 352828 436993 4096 8 10444 10329 702314 595782 4096 16 16097 18554 375772 620059 4096 32 27947 33927 801082 515141 4096 64 27213 74773 455158 327236 4096 128 38626 48124 1032518 354942 4096 256 45674 109372 520794 491010 4096 512 44417 65025 762607 637807 8192 4 7240 2303 379733 303856 8192 8 11250 15504 465536 294536 8192 16 21119 24647 684664 744461 8192 32 30686 40378 845241 585646 8192 64 48719 47197 714030 763688 8192 128 38958 65625 897453 269252 8192 256 36073 45998 592758 586655 8192 512 36641 61691 1188967 1120676 16384 4 5901 11005 345298 115968 16384 8 9474 11797 482337 225253 16384 16 15669 16533 840771 547060 16384 32 31237 32865 587432 595000 16384 64 30201 60594 842493 1159102 16384 128 33761 59323 1088852 593987 16384 256 38392 51630 915005 386836 16384 512 44959 51206 757817 587829 32768 4 7743 9146 334627 393747 32768 8 10474 12074 267414 485818 32768 16 16112 23610 1045570 518096 32768 32 31719 45017 602229 613657 32768 64 39197 56555 616830 590551 32768 128 44543 52821 948608 892664 32768 256 46030 55225 1126319 793931 32768 512 47524 64424 721078 431913 65536 4