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: Sat Aug 22 03:07:07 2026 Auto Mode Machine = Linux oleg237-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-oleg237-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 3176 10727 450541 426897 64 8 6012 9925 1392258 306501 64 16 6608 31949 818885 863676 64 32 2919 57091 1255511 1279447 64 64 5398 69945 1599680 1210227 128 4 5682 8608 64097 245280 128 8 8442 16171 631014 710329 128 16 13838 23875 677178 785122 128 32 7511 21411 1076312 344854 128 64 13085 63491 1440082 1183041 128 128 14778 77194 1436229 1231904 256 4 7386 5514 809878 126982 256 8 5713 9104 675391 630202 256 16 14178 24561 941213 572721 256 32 19142 44054 581719 602276 256 64 14519 24107 455398 800221 256 128 14874 71345 1384034 1347557 256 256 32136 86488 775933 2170027 512 4 7883 9289 378424 754083 512 8 15296 11245 771143 488530 512 16 13970 8603 1127402 297155 512 32 10397 42447 742096 912733 512 64 16533 53166 1760512 1199171 512 128 27752 75139 1574625 1302447 512 256 28463 86296 1406520 1372364 512 512 25589 103960 579179 2030130 1024 4 8125 4489 246570 768219 1024 8 7636 12233 128546 749060 1024 16 16020 35899 951517 913471 1024 32 13081 14232 1166221 1068983 1024 64 28026 52867 1378445 1136293 1024 128 32039 85148 856970 985580 1024 256 48810 101134 1568189 915809 1024 512 25109 80194 1490373 1058967 2048 4 7972 6463 571754 353716 2048 8 11876 9487 868564 392112 2048 16 17412 23402 1059987 496361 2048 32 22688 29701 1175124 221739 2048 64 33797 42254 1327285 1162246 2048 128 29172 58143 1453505 566214 2048 256 37596 54822 1530689 1338453 2048 512 34655 35630 1616531 1016824 4096 4 5240 6830 152893 256271 4096 8 12974 13446 500917 380668 4096 16 18525 20060 870536 543085 4096 32 26249 24494 822522 213499 4096 64 15414 30796 1410404 382413 4096 128 37294 38360 737371 479458 4096 256 42030 45340 1595040 1143205 4096 512 31258 34005 649429 1145721 8192 4 1989 8122 241339 225582 8192 8 12523 12758 388136 612442 8192 16 14167 20931 725213 475726 8192 32 21492 22734 327039 542989 8192 64 16593 24798 729927 573792 8192 128 25069 43352 782489 903115 8192 256 26730 43115 465032 535491 8192 512 30788 50580 389077 803759 16384 4 4770 4386 225253 266718 16384 8 7711 7388 220187 256645 16384 16 14465 15803 730640 293778 16384 32 19145 25446 511969 374440 16384 64 23451 33738 930114 632829 16384 128 29203 42394 969234 717938 16384 256 29462 37602 737358 879251 16384 512 38451 37225 940952 867059 32768 4 5766 5900 205358 187703 32768 8 9426 8940 303564 258156 32768 16