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: Thu Sep 17 18:25:30 2026 Auto Mode Machine = Linux oleg402-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-oleg402-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 3397 5591 627470 410573 64 8 4358 23391 842003 205886 64 16 4305 27515 576282 969761 64 32 3299 29315 1124074 603489 64 64 5573 22330 1599680 1648808 128 4 4539 10073 327399 505620 128 8 8606 15552 609522 692017 128 16 6891 47654 921183 785122 128 32 11777 52307 402510 379734 128 64 5946 44521 1133103 1185654 128 128 10089 62261 1436229 1487977 256 4 5423 5670 126489 297616 256 8 5008 17306 904732 750970 256 16 5793 9776 1128110 917096 256 32 11350 42370 1143731 442086 256 64 25053 52805 1339154 1298662 256 128 13891 88703 1391207 1158540 256 256 18845 136316 1384034 1970871 512 4 10218 7102 255628 146497 512 8 8598 12327 588544 122897 512 16 16629 14612 211225 542457 512 32 9814 22108 332283 426273 512 64 14095 30979 1230786 944444 512 128 29629 71760 1365383 988345 512 256 33562 43426 866338 888930 512 512 10853 61933 1282994 1647088 1024 4 5696 7971 265157 253962 1024 8 5982 10897 368483 277420 1024 16 12639 24593 259502 214814 1024 32 20628 17129 712644 399539 1024 64 23564 27799 237477 166369 1024 128 18116 21110 409130 703308 1024 256 15248 28050 1565902 800731 1024 512 38133 67981 1664841 549312 2048 4 5429 5242 101829 415157 2048 8 15615 16589 548639 381456 2048 16 22363 16840 364787 450706 2048 32 12487 20110 637623 453395 2048 64 28767 34187 1503627 968774 2048 128 21051 48229 1506000 880133 2048 256 26499 65672 1065642 324101 2048 512 26472 50870 1113723 1491617 4096 4 9175 7172 158348 104171 4096 8 8555 10566 272105 182247 4096 16 1759 20890 402397 801232 4096 32 27280 25121 650658 600488 4096 64 27578 42254 660109 723825 4096 128 35592 53419 888868 1089622 4096 256 39311 60792 1647663 843315 4096 512 34647 58883 588597 942715 8192 4 6393 7407 189572 178891 8192 8 13556 14952 466541 384708 8192 16 19845 27824 461912 573103 8192 32 23559 38803 727270 770867 8192 64 28447 40430 452245 598426 8192 128 31708 48066 741425 628403 8192 256 34860 51675 1262028 718976 8192 512 34909 67346 688809 271008 16384 4 6833 7576 267236 252216 16384 8 11431 16280 381013 290208 16384 16 15979 22422 363378 412477 16384 32 29795 36768 863225 519897 16384 64 38794 53187 593341 731557 16384 128 35741 62549 932816 556312 16384 256 40607 64790 938805 515575 16384 512 54088 92320 558836 735700 32768 4 8929 8322 451207 301342 32768 8 13628 14362 508316 246863 32768 16 19316 21984 714615 515786 32768 32 24466 34728 910144 622231 32768 64 31952 43629 885504 654001 32768 128 36912 55715 1031059 822343 32768 256 36399 55701 1024579 658946 32768 512