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: Fri Jul 3 23:57:33 2026 Auto Mode Machine = Linux oleg104-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-oleg104-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 1336 7915 566551 546928 64 8 1521 7659 720041 811459 64 16 2092 22106 1066042 710511 64 32 2319 6544 194545 293434 64 64 4364 32768 1638743 1357066 128 4 2492 4792 518312 513847 128 8 2100 13631 747933 652488 128 16 2910 13254 907174 301138 128 32 3007 32104 1266785 506097 128 64 2767 69008 1067750 1332828 128 128 3824 77584 1217930 1467639 256 4 5664 5409 71109 530031 256 8 3786 4048 856386 20516 256 16 7464 11054 927393 493264 256 32 5007 31302 1128110 284073 256 64 6723 40042 1300235 1153561 256 128 16119 57462 1384034 1231629 256 256 13922 28616 1532153 1729594 512 4 6940 3176 362885 538377 512 8 5135 12401 447970 165588 512 16 14232 23330 65716 122455 512 32 7758 29738 737762 771143 512 64 14049 51016 485767 876593 512 128 16357 47245 288609 979331 512 256 6625 58992 1079785 544106 512 512 10453 68623 748563 870552 1024 4 4938 3331 251405 215267 1024 8 6755 6858 474959 170038 1024 16 8842 17672 556501 111729 1024 32 19392 34868 1097669 591609 1024 64 25504 29316 114411 959596 1024 128 17242 38975 581831 337182 1024 256 27695 64617 1544504 472763 1024 512 33511 83271 1321200 610965 2048 4 8724 6775 319853 397740 2048 8 9619 9943 203718 274458 2048 16 10577 7795 155303 371829 2048 32 10381 16486 170937 646452 2048 64 24683 35273 324775 267993 2048 128 19348 45629 471798 322157 2048 256 18441 28743 895829 1256425 2048 512 24580 58437 366108 617234 4096 4 5140 4592 216628 210494 4096 8 12713 13684 576335 303430 4096 16 12754 15868 258224 580247 4096 32 22853 17761 761626 341705 4096 64 29199 43554 1546926 522711 4096 128 18815 29029 623050 863405 4096 256 30885 40679 1067549 639588 4096 512 33379 50579 1540545 597087 8192 4 2115 4232 190977 121092 8192 8 8538 9564 206352 236429 8192 16 11469 14073 350563 344967 8192 32 19536 20828 436442 359611 8192 64 22797 25637 660334 775548 8192 128 26976 47901 478922 453852 8192 256 29839 41810 548914 357679 8192 512 45333 45513 640301 737146 16384 4 5005 4145 171326 173406 16384 8 6658 9787 404242 480116 16384 16 18309 12926 408417 249961 16384 32 15293 14575 842100 520622 16384 64 18271 23493 625747 428319 16384 128 17726 23952 1137630 869450 16384 256 23265 38035 781864 712807 16384 512 27435 38788 418256 931009 32768 4 5018 4135 485516 111468 32768 8