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 May 19 10:59:24 2026 Auto Mode Machine = Linux oleg404-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-oleg404-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 2173 1908 542506 524487 64 8 1370 5387 789967 537079 64 16 1729 8463 769584 842003 64 32 2236 21269 1087638 769584 64 64 4992 19522 598110 1013707 128 4 1726 2655 511887 152571 128 8 1759 3716 612303 673778 128 16 5057 18038 927549 504196 128 32 5660 6579 183683 934004 128 64 2696 25728 1093856 529038 128 128 4712 12526 1306873 770474 256 4 3521 5947 316849 543720 256 8 4123 6117 897923 476835 256 16 10120 34763 1079348 417018 256 32 15639 27829 898674 996229 256 64 12943 44260 588736 1292410 256 128 17885 124451 837026 787890 256 256 21527 115421 1561112 706964 512 4 5001 3581 254236 445553 512 8 4981 13574 650593 499902 512 16 18415 15946 1042566 633699 512 32 11765 36534 753025 816594 512 64 8567 23395 690996 1057974 512 128 18347 33363 1300082 1127402 512 256 19217 83171 729244 1438555 512 512 9781 28662 531712 1741948 1024 4 3616 3225 113112 317515 1024 8 4568 7491 770977 422616 1024 16 11279 20790 625103 319000 1024 32 27308 44888 1021928 519795 1024 64 19541 63760 696126 209706 1024 128 27693 73473 1352828 859026 1024 256 30077 27405 1307923 210477 1024 512 16783 27721 253408 1503942 2048 4 4420 4201 352859 209752 2048 8 8586 9515 390313 813995 2048 16 16837 12441 1072293 450896 2048 32 11700 23088 362738 292107 2048 64 22248 33116 868915 853292 2048 128 23642 43890 950865 195475 2048 256 25398 38742 512012 827801 2048 512 15821 32485 456843 1531781 4096 4 5193 4799 342960 272321 4096 8 10462 8730 505248 151026 4096 16 8078 17996 505620 359270 4096 32 13450 13541 496243 658111 4096 64 21060 18463 478270 176620 4096 128 20707 33102 579172 405742 4096 256 26383 39601 1629998 717088 4096 512 36449 43988 555177 670177 8192 4 4244 4882 439912 223276 8192 8 7795 8074 482195 454807 8192 16 12410 13856 496543 396494 8192 32 18267 25817 719367 556786 8192 64 20805 28357 485363 435050 8192 128 25003 26937 713719 732011 8192 256 21411 35777 708714 403047 8192 512 26819 42811 407826 446817 16384 4 5021 4952 226539 179220 16384 8 7474 13355 559696 480495 16384 16 15135 11662 487850 261499 16384 32 13680 23221 363610 329208 16384 64 20693 32906 455364 285107 16384 128 27843 35068 469793 524000 16384 256 33734 35459 322551 466832 16384 512 36656 45521 751321 384023 32768 4