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 Sep 4 23:57:00 2026 Auto Mode Machine = Linux oleg231-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-oleg231-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 2521 12064 418250 81299 64 8 3379 5059 566551 191492 64 16 4311 15166 312204 1330167 64 32 3887 55844 488236 463774 64 64 3144 64592 1484662 889431 128 4 3673 7045 262296 508012 128 8 4290 7286 443033 631014 128 16 5547 35547 848397 757430 128 32 7536 53736 1015251 539674 128 64 12017 53763 1121270 424133 128 128 10496 107744 2066432 1967960 256 4 4569 11136 562520 495999 256 8 5647 17888 39987 272675 256 16 17129 6558 762164 809878 256 32 15122 49729 792543 825443 256 64 15408 44138 1098113 965763 256 128 7715 50245 561637 980760 256 256 6133 61862 168540 2205688 512 4 6653 9964 384384 470134 512 8 9935 19350 603089 661414 512 16 16154 16296 756207 713021 512 32 20944 18572 1066380 385212 512 64 12163 79826 1625889 677267 512 128 24414 85204 426697 673655 512 256 25538 88243 478408 1155924 512 512 35177 103166 1657257 2124526 1024 4 7538 5592 213331 100549 1024 8 4885 9588 196738 126204 1024 16 11998 21049 304590 764255 1024 32 18418 43563 1002839 551711 1024 64 15528 47506 310873 579476 1024 128 14357 33382 263773 145909 1024 256 25659 92820 1233900 1768345 1024 512 44281 52346 250921 1316341 2048 4 10818 11842 243170 166449 2048 8 13363 18051 219271 340818 2048 16 9697 12931 204737 338402 2048 32 11602 24235 300160 950339 2048 64 34018 23503 590706 616127 2048 128 42115 51812 791348 584476 2048 256 33591 50271 769582 444917 2048 512 35489 65102 1422220 669529 4096 4 9821 12355 514570 321030 4096 8 8273 9541 286934 443193 4096 16 11535 18466 450515 403190 4096 32 15136 29842 721879 505545 4096 64 20645 27394 685062 582806 4096 128 29134 41015 597959 968108 4096 256 20093 38333 1011305 180233 4096 512 28760 54375 740166 457449 8192 4 7212 6764 243961 232470 8192 8 8812 9891 575802 405162 8192 16 14862 20873 488551 529101 8192 32 17642 22720 488725 455869 8192 64 16765 29044 739622 677201 8192 128 24707 46101 823741 296200 8192 256 31250 44171 981656 526176 8192 512 30964 55654 291002 595130 16384 4 5673 7249 293625 281106 16384 8 14225 14006 526598 638426 16384 16 19444 24409 390831 542226 16384 32 19169 23092 761934 488082 16384 64 23862 30449 705359 643870 16384 128 46777 39390 786328 793639 16384 256 34628 39961 876146 603592 16384 512 25777 40449 729081 317169 32768 4 6553 5914 403541 300026 32768 8 8569 7877 395490 344458 32768 16