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: Thu Apr 23 22:06:34 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 4 720 1573 429630 420873 64 8 1084 3392 397796 32322 64 16 786 2230 752329 546928 64 32 1563 14953 889431 727850 64 64 2281 8081 467002 831569 128 4 710 822 41146 70180 128 8 1160 1780 464097 568836 128 16 1938 3579 287587 82534 128 32 1018 5141 666253 103467 128 64 1778 10763 673778 735635 128 128 1889 16964 841746 1306873 256 4 1203 1936 170224 223985 256 8 1089 3039 352184 272675 256 16 1537 2276 68028 122074 256 32 1956 7194 96137 739590 256 64 4284 4284 850282 773697 256 128 6238 3887 427478 459491 256 256 3111 12896 780445 677095 512 4 712 880 38817 216659 512 8 1475 2674 49670 432802 512 16 2464 3100 756207 570865 512 32 2599 4697 113980 641651 512 64 3117 7088 780390 757274 512 128 4773 10988 626672 796306 512 256 4916 9463 491774 941133 512 512 4276 17049 129884 704368 1024 4 1320 1008 49043 63684 1024 8 2231 2373 453687 128450 1024 16 2566 8536 197953 26031 1024 32 4493 4872 486031 598868 1024 64 4218 9287 649296 514810 1024 128 4271 7747 81593 689976 1024 256 7774 34207 572982 106080 1024 512 6500 24429 42056 501935 2048 4 1363 997 67751 47324 2048 8 2618 1775 105321 78560 2048 16 3062 4130 276792 160740 2048 32 5032 4963 94947 95669 2048 64