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 Aug 11 12:10:49 2026 Auto Mode Machine = Linux oleg351-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-oleg351-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 5163 10670 415659 546928 64 8 10403 20299 889431 695778 64 16 7471 35242 1304314 1049372 64 32 5965 38697 1828508 571375 64 64 8523 70091 710511 1879725 128 4 8013 8573 653282 522346 128 8 4091 26822 223807 506097 128 16 14857 23125 962469 1076312 128 32 12532 55560 1220700 1074159 128 64 18280 91556 1885042 1878447 128 128 9470 123908 486381 2336194 256 4 8340 12186 164739 209641 256 8 8409 23435 281614 387379 256 16 16975 44368 1103757 450054 256 32 13179 64319 716876 1152323 256 64 17503 49835 1369908 1298662 256 128 23840 74483 289980 1391207 256 256 32396 91555 996229 1952947 512 4 8272 9927 488975 575917 512 8 16310 20024 479369 613951 512 16 19925 47894 603089 376764 512 32 28899 74690 503536 1091863 512 64 45361 86110 658170 219740 512 128 43760 75483 1542947 1450212 512 256 34487 111738 768934 262695 512 512 40666 75525 1147892 2007358 1024 4 12527 12777 392348 556573 1024 8 13867 26931 198990 484168 1024 16 16837 27172 449932 279787 1024 32 36188 38836 909410 705155 1024 64 35057 92285 811472 744257 1024 128 18080 62128 518477 1063425 1024 256 58527 64248 1426517 1078919 1024 512 46625 93840 1272279 937805 2048 4 13462 10576 540934 209190 2048 8 17561 14424 261786 705955 2048 16 17197 30596 1144896 516662 2048 32 30495 65773 969758 930471 2048 64 50374 55948 414756 886949 2048 128 53621 84662 1419165 1013465 2048 256 29996 79370 1388428 688637 2048 512 65964 68630 856184 1728424 4096 4 11740 10082 454857 455617 4096 8 16669 22611 840181 574638 4096 16 31865 43414 1034881 927097 4096 32 35547 37386 1125603 969255 4096 64 53358 67261 751827 992264 4096 128 65996 93944 1376723 1096087 4096 256 49934 65598 1483990 1406133 4096 512 58324 94584 628889 1540960 8192 4 10490 11444 508371 264070 8192 8 18967 20632 314365 374849 8192 16 26805 22371 1008628 472624 8192 32 46194 50077 936748 881136 8192 64 37791 45264 1088787 1125596 8192 128 35831 65849 1400562 940620 8192 256 29672 47321 1364900 517303 8192 512 46570 93779 982357 1068605 16384 4 2955 10795 489514 548177 16384 8 19980 22700 555956 571748 16384 16 23850 28619 560884 821582 16384 32 41240 31512 1108292 1011535 16384 64 25102 26668 894717 802461 16384 128 41193 69939 1298853 575748 16384 256 49745 50651 1327173 1252113 16384 512 50341 79296 835791 989911 32768 4 9443 11425 284089 486871 32768 8 16263 18160 878733 676956 32768 16 29835 23087 1186006 1038931 32768 32 32796 43415 1062454 1032352 32768 64 48935 47635 803037 1018203 32768 128 56662 55146 1451005 1195424 32768 256 56546 66786 1498857 1263274 32768 512 52991 74171 1190011 1335606 65536 4 10689 12298 627420 532769 65536 8 18379 18311 860424 737195 65536 16 30891 46650