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 Jul 16 03:53:25 2026 Auto Mode Machine = Linux oleg259-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-oleg259-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 5816 6434 633392 603489 64 8 4153 23651 842003 484710 64 16 7891 38691 1029254 863676 64 32 4267 42108 1119387 863676 64 64 2800 43388 1210227 1828508 128 4 3838 6708 566435 53198 128 8 4568 37691 481150 688467 128 16 12190 40086 881842 962469 128 32 7981 31372 1209698 902598 128 64 8490 66768 1406136 1278855 128 128 9810 96894 1579934 687585 256 4 7178 4922 567575 554101 256 8 4607 6654 739590 827989 256 16 10407 26405 2065659 947860 256 32 14610 43404 1588832 567575 256 64 24316 42859 1514860 572721 256 128 28030 87347 907792 1642294 256 256 14580 150852 1802167 2984226 512 4 15581 13432 307318 81529 512 8 13435 16564 570865 720195 512 16 14923 17105 695472 1066380 512 32 9754 33846 1252318 857687 512 64 7957 27705 932550 305482 512 128 24641 39748 283803 1458090 512 256 24641 46929 1734911 89494 512 512 26369 72863 1224470 134345 1024 4 6050 3691 192007 86581 1024 8 6467 12139 793189 268556 1024 16 12040 13009 705271 972414 1024 32 24483 32370 1039489 1004951 1024 64 40123 26105 1556257 227707 1024 128 22541 51133 588851 1424152 1024 256 22375 45321 1166538 798201 1024 512 16506 64826 910953 679496 2048 4 3909 2856 90347 106228 2048 8 4765 5970 471668 255837 2048 16 5553 10297 725697 1036454 2048 32 12836 13762 322580 1195569 2048 64 18374 20203 484163 314352 2048 128 17163 40878 757369 818884 2048 256 35093 65510 313480 1485169 2048 512 13530 73948 286466 648894 4096 4 792 3213 504314 179334 4096 8 13626 10286 215817 232645 4096 16 13345 12538 266334 659374 4096 32 19497 18001 594916 200991 4096 64 15263 49293 564815 666459 4096 128 22134 68794 572074 301910 4096 256 17017 26459 147588 174275 4096 512 38442 31557 992493 792582 8192 4 5553 5389 315574 315661 8192 8 9894 13161 361089 472157 8192 16 19735 22257 638504 471807 8192 32 25906 29319 744316 730781 8192 64 29150 45130 631905 536797 8192 128 26605 37787 994527 698797 8192 256 35342 62191 580089 310232 8192 512 32794 54023 523148 535809 16384 4 7061 6566 433873 314025 16384 8 9940 11507 538310 252406 16384 16 9916 23752 999340 469078 16384 32 23815 30929 614028 422159 16384 64 25187 35882 1144374 894857 16384 128 29583 56360 1253163 1224426 16384 256 28055 50775 927178 767328 16384 512 34046 64786 1869469 1652116 32768 4 5057 6078 358520 266551 32768 8