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 Apr 14 14:28:36 2026 Auto Mode Machine = Linux oleg205-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-oleg205-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 7262 18151 586352 503814 64 8 6077 35242 453587 627470 64 16 13010 55077 1101022 863676 64 32 6364 73993 1143223 418250 64 64 6478 21606 1143223 1638743 128 4 8552 11782 508012 445978 128 8 3851 19141 895074 1254941 128 16 9951 56812 953918 767171 128 32 20602 89570 1105114 921183 128 64 13337 107378 1231904 2004703 128 128 18596 61211 1096089 2905056 256 4 4433 4354 342195 548161 256 8 16129 25981 827989 778183 256 16 19097 27702 556398 870974 256 32 34986 12925 1219045 1084800 256 64 45884 116840 731528 1080434 256 128 64824 123435 395076 883152 256 256 41995 137187 1707589 2170027 512 4 7793 15053 242193 538377 512 8 11720 23213 1402845 526111 512 16 22047 45644 746222 878386 512 32 9405 46154 1394645 256513 512 64 42282 83785 1219602 1125040 512 128 11718 94866 1451192 1312798 512 256 19723 74377 2016784 1221684 512 512 15854 34288 123434 333573 1024 4 4602 5677 270535 419479 1024 8 13076 6255 383794 732453 1024 16 21755 33829 867003 931702 1024 32 31363 57152 429891 523469 1024 64 47967 72032 545822 900637 1024 128 51087 81256 688207 760197 1024 256 50159 95122 286583 1035479 1024 512 56368 75024 1054547 852039 2048 4 5836 10709 245561 351473 2048 8 15823 21352 419332 171826 2048 16 21965 22206 729890 1122162 2048 32 15590 43225 579195 529334 2048 64 21205 41001 1387530 460344 2048 128 36406 41531 1585208 1513696 2048 256 38653 41175 906129 1649117 2048 512 39034 110102 1232980 1719773 4096 4 8153 8115 196178 125275 4096 8 13326 14510 156078 117377 4096 16 10614 15429 711711 398875 4096 32 13654 22376 629280 720124 4096 64 25740 35329 1033822 807901 4096 128 29324 28421 564573 1086178 4096 256 26363 67201 1609988 1099595 4096 512 31284 63290 916562 636131 8192 4 6851 7198 196149 151546 8192 8 13122 14961 428672 303521 8192 16 15911 17064 349323 603153 8192 32 16579 28075 434961 631859 8192 64 31283 34820 567706 614040 8192 128 20078 27866 242474 205808 8192 256 28747 40419 922735 873631 8192 512 29568 38545 316502 411017 16384 4 6038 7026 367354 377563 16384 8 13419 16236 306874 326680 16384 16 19198 22616 760282 592446 16384 32 26717 49853 356094 360929 16384 64 29546 34078 977395 573988 16384 128 28050 35967 730616 480482 16384 256 34998 75025 1319047 693766 16384 512 34717 53179 1173993 1011535 32768 4 8656 8397 468998 366803 32768 8 13599 13722 362341 398608 32768 16 15809 20147 575856 345726 32768 32 22589 40695 640159 377502 32768 64 33557 46462 647168 972662 32768 128