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 Jun 1 12:44:05 2026 Auto Mode Machine = Linux oleg202-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-oleg202-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 4304 11790 598110 542506 64 8 5324 15971 639427 710511 64 16 6309 28117 344233 877797 64 32 8106 42161 1204796 1070292 64 64 5634 42468 1163036 1526887 128 4 3320 11625 538051 320940 128 8 8795 22455 847059 766076 128 16 9646 32744 1254941 1000121 128 32 12204 51366 1377278 927549 128 64 14948 34224 1421023 908709 128 128 13175 153268 1939522 3199360 256 4 10412 17208 822913 536654 256 8 9752 21790 670332 785010 256 16 6219 14377 1126926 988889 256 32 4078 50462 1430119 97006 256 64 26641 85306 1447470 1718521 256 128 15929 104614 1479379 1497953 256 256 11551 44561 1094754 1911233 512 4 4919 10086 593259 244872 512 8 7991 29371 687237 777002 512 16 10885 29042 1110496 1030064 512 32 13487 14842 476709 511451 512 64 22125 86543 445646 644927 512 128 25448 28814 1450212 1406520 512 256 9784 26840 1689859 1571169 512 512 13872 83781 2548017 2256220 1024 4 6626 6683 430236 589902 1024 8 6590 7916 359537 842017 1024 16 17795 27093 468024 1026078 1024 32 35846 93387 788819 970656 1024 64 43990 133559 1187831 955327 1024 128 78324 86573 298452 1251882 1024 256 75029 141436 1444266 1244266 1024 512 64398 196092 1875690 2225595 2048 4 8013 10479 507835 257802 2048 8 12319 6925 291156 806657 2048 16 10148 9057 1033213 129104 2048 32 10418 11845 345771 517316 2048 64 9597 21689 412485 426494 2048 128 12994 43548 1645012 1316907 2048 256 29644 34342 873333 826129 2048 512 12769 35509 1750259 1531781 4096 4 6313 5258 278754 243984 4096 8 12539 27802 641906 622305 4096 16 24514 20066 598147 518546 4096 32 10687 18775 360400 353525 4096 64 16722 40416 558880 361934 4096 128 24612 1066 2113455 1517548 4096 256 22655 21496 330269 878594 4096 512 26340 82654 973153 1346510 8192 4 4089 3587 133661 137438 8192 8 9747 12794 313607 410668 8192 16 11925 21591 742579 622258 8192 32 15171 18338 915605 771300 8192 64 29271 36268 587157 437749 8192 128 21957 31423 303440 279114 8192 256 23409 45061 1482953 807006 8192 512 27974 57283 492014 554709 16384 4 4135 4896 248997 257820 16384 8 5734 7593 336842 457130 16384 16 11105 9558 450815 385369 16384 32 17302 22572 687161 596648 16384 64 19399 36539 853236 863496 16384 128 24873 40081 294628 308282 16384 256 31015 51643 1373460 1688364 16384 512 32358 59713 898789 716053 32768 4 4475 4760 261241 179618 32768 8