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 Jul 6 11:04:21 2026 Auto Mode Machine = Linux oleg146-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-oleg146-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 3433 11220 771797 552557 64 8 2935 15960 889431 138525 64 16 4825 37164 1279447 273409 64 32 4767 32736 1255511 1255511 64 64 5058 66185 1599680 1452528 128 4 5118 10368 646983 234461 128 8 5360 16747 927549 887675 128 16 7767 26919 1142750 476031 128 32 8076 49692 1332828 962469 128 64 8676 57916 1319723 1281909 128 128 4706 60148 1436229 2004703 256 4 6379 8972 434747 539079 256 8 7872 20013 651619 412215 256 16 9714 24514 980760 669913 256 32 10625 43612 1213534 930608 256 64 16352 53682 1185399 490560 256 128 16370 93778 1347557 1570244 256 256 18123 79086 73203 2114473 512 4 8166 12132 458393 436143 512 8 11530 15352 666546 617482 512 16 14258 27774 692780 382331 512 32 21032 45197 1279935 1024169 512 64 19415 58122 1051757 946526 512 128 20905 63193 1166599 1286067 512 256 27344 85979 1580419 1657257 512 512 19796 62248 1605228 312233 1024 4 6852 9306 636404 647631 1024 8 9842 16488 613145 805688 1024 16 17416 26560 1122630 955115 1024 32 13001 34146 883591 1104443 1024 64 16637 30549 807657 147063 1024 128 25640 28829 977282 557440 1024 256 17683 65289 1695065 493231 1024 512 38885 97200 1508167 1172909 2048 4 6045 6638 131072 118903 2048 8 12684 11415 930875 467153 2048 16 21831 25150 712100 977594 2048 32 23521 38468 724962 319901 2048 64 34809 56980 384753 471021 2048 128 40833 68591 1516101 586511 2048 256 35433 78221 1655474 157697 2048 512 39151 76899 1158327 800045 4096 4 4451 4489 360151 157326 4096 8 5373 9419 330669 389868 4096 16 18196 25026 771511 201198 4096 32 23952 27210 679508 456683 4096 64 29414 46605 557574 247431 4096 128 39744 50705 700053 353897 4096 256 44637 45441 1294561 570157 4096 512 22358 34965 497148 360506 8192 4 5212 4123 174227 244741 8192 8 11034 11867 589393 337383 8192 16 13592 2593 856812 857711 8192 32 18924 14383 433507 470643 8192 64 13707 25183 446800 280914 8192 128 14965 32942 538665 736419 8192 256 29370 34552 330242 495434 8192 512 26591 44631 1126666 619900 16384 4 4901 5930 305866 330076 16384 8 7824 7781 586604 477696 16384 16 13311 15349 429765 235294 16384 32 17164 23048 397064 274884 16384 64 23451 26390 1013743 694797 16384 128 26277 44425 738222 650649 16384 256 31405 27773 555709 887931 16384 512 24864 37691 1405743 568574 32768 4 3949 4837 222747 271091 32768 8 8075 10777 450814 441178 32768 16 12824 15885 717997 652969 32768 32