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 30 19:18:56 2026 Auto Mode Machine = Linux oleg157-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-oleg157-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 1437 7159 653436 557144 64 8 3522 23163 842003 239716 64 16 2823 13737 1083249 863676 64 32 5788 44414 603489 520419 64 64 4272 50195 1183548 926260 128 4 3902 10955 621518 436904 128 8 6786 13775 249497 529038 128 16 5240 24223 1172704 983630 128 32 7400 21508 1332828 1254941 128 64 11559 79953 1391557 992724 128 128 8688 28608 1254941 735635 256 4 2419 6598 407058 252419 256 8 8319 12251 895676 448362 256 16 6221 12219 1190657 1027695 256 32 5868 39215 1347557 651223 256 64 13023 51980 598249 523570 256 128 13164 40365 677095 1112909 256 256 13998 80023 1629830 1956506 512 4 7323 8659 456735 587256 512 8 8259 9468 836636 459177 512 16 13400 16807 723105 666753 512 32 16989 41323 912733 751971 512 64 18930 44256 1007827 859060 512 128 9848 30886 1155302 733478 512 256 23453 51261 1135150 1185272 512 512 19737 75886 1560891 1433753 1024 4 4162 5653 656842 550227 1024 8 8649 15712 774592 312115 1024 16 8481 14552 1072185 1019987 1024 32 15718 32774 407654 527585 1024 64 15793 32365 680357 950885 1024 128 39654 100648 644038 998874 1024 256 40021 55861 942745 661496 1024 512 26893 43520 736094 477175 2048 4 5681 3074 194828 164697 2048 8 4704 9287 733505 184587 2048 16 6450 9659 387286 345257 2048 32 23780 32362 617057 1175607 2048 64 28867 40687 1514764 953821 2048 128 36843 32302 781414 1235996 2048 256 42080 46653 597236 1481839 2048 512 23005 71623 566065 640380 4096 4 5181 4772 363442 428043 4096 8 9935 8240 587329 172827 4096 16 17923 24074 590194 282969 4096 32 13756 46223 1040648 508373 4096 64 16390 28148 470916 362890 4096 128 36069 37343 1627373 599190 4096 256 18152 28881 1145797 257299 4096 512 29775 41408 497695 297518 8192 4 4045 1264 153155 434961 8192 8 6279 8276 319864 424940 8192 16 10929 10602 281813 463189 8192 32 11031 18029 606818 376092 8192 64 16499 25600 634542 615845 8192 128 29195 55860 1214519 796418 8192 256 39765 51832 796344 1040233 8192 512 18687 48424 1108063 816750 16384 4 5097 5009 272407 166782 16384 8 8493 18395 409549 398889 16384 16 11069 11562 506255 371493 16384 32 14780 19726 310615 501577 16384 64 20466 34392 744484 524304 16384 128 20524 25441 413631 398899 16384 256 20880 43815 540439 491612 16384 512 33630 47229 733494 592890 32768 4 4183 4515 269995 242474 32768 8 9453 10575 497971 463185 32768 16