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 Jun 23 08:51:01 2026 Auto Mode Machine = Linux oleg326-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-oleg326-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 2841 11642 351905 520419 64 8 3535 13467 666414 621657 64 16 7936 39899 913649 720041 64 32 3362 41586 1255511 1105556 64 64 3759 57079 769584 1991276 128 4 5712 6151 407707 186880 128 8 6516 8522 240662 646983 128 16 6520 12716 1065630 227313 128 32 4213 25039 889145 1172704 128 64 6946 20915 1175271 1022989 128 128 3579 41358 1359835 1827299 256 4 4274 5213 318825 208137 256 8 4398 23096 319584 739590 256 16 14580 30508 1044693 659625 256 32 5847 20003 962301 1003679 256 64 17774 63273 1044693 535583 256 128 17743 66896 1514860 1368162 256 256 14801 84097 1660068 292907 512 4 9125 9273 262310 126324 512 8 13528 6324 550523 701378 512 16 12722 24109 343388 831132 512 32 23139 53980 1132755 399992 512 64 20795 47149 867738 1145443 512 128 15967 80349 538377 752761 512 256 30092 53426 848872 1556366 512 512 15340 88688 1040545 986529 1024 4 7018 7515 569563 175521 1024 8 7540 6300 196810 702847 1024 16 16313 15895 305587 804480 1024 32 18516 56743 847667 1009913 1024 64 21425 35820 915028 825827 1024 128 42746 49181 983548 614637 1024 256 42454 82594 994250 1083546 1024 512 32283 70993 1521524 943781 2048 4 5667 4746 455293 148095 2048 8 11050 19542 627057 522317 2048 16 12770 13313 578688 315125 2048 32 27950 27783 507535 584158 2048 64 30732 42034 777805 299104 2048 128 27321 27244 730697 306675 2048 256 21403 32869 509461 1359854 2048 512 36009 68433 608619 251684 4096 4 6423 5685 172688 112545 4096 8 6843 11879 217365 231018 4096 16 11614 17104 737086 881434 4096 32 34868 45034 425688 678809 4096 64 24494 25250 432613 361295 4096 128 20121 33850 1188605 851761 4096 256 30017 52488 602531 606102 4096 512 27980 41756 771823 174811 8192 4 6168 9102 323630 480947 8192 8 9403 7950 445023 527387 8192 16 25789 24964 443078 287527 8192 32 20364 20361 513093 503905 8192 64 19739 36505 407377 538066 8192 128 24332 36667 1046251 460896 8192 256 31565 44729 1124933 1401534 8192 512 30773 43968 1069004 669835 16384 4 5667 4743 337535 258345 16384 8 15017 9458 248510 257626 16384 16 12211 13503 283043 353759 16384 32 19892 30511 476349 351059 16384 64 25128 28714 753744 611232 16384 128 30845 42351 515997 471347 16384 256 33700 57529 1026570 407724 16384 512 38589 53853 887736 354732 32768 4 6630 6927 381920 278008 32768 8 10417 11657 327362 307701 32768 16 16114 20134 447986 519649 32768 32