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 Aug 27 16:36:47 2026 Auto Mode Machine = Linux oleg345-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-oleg345-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 2198 6162 598110 491815 64 8 3334 25295 752329 608965 64 16 7057 43985 942521 484710 64 32 1995 30473 1183548 272300 64 64 4512 13576 1017549 1183548 128 4 6769 12459 609522 486381 128 8 8024 6653 540217 624409 128 16 11220 33746 947186 385460 128 32 13212 44506 1093856 841746 128 64 4786 77483 1065630 1377278 128 128 7486 54192 1436229 1642783 256 4 8019 6181 567575 539079 256 8 13816 19245 62228 475779 256 16 14761 37268 802614 870268 256 32 14997 31295 723153 992545 256 64 6842 21498 1306564 955451 256 128 23177 80125 1398455 1032636 256 256 18108 61596 1254656 1152323 512 4 4509 4311 193365 127456 512 8 12172 17423 328220 486317 512 16 12710 15759 633699 602243 512 32 18149 23513 996139 1032044 512 64 19480 38166 1218910 967855 512 128 23641 100529 988345 748563 512 256 18701 62976 1446306 1414860 512 512 39984 111890 1276891 2047551 1024 4 7940 12437 554417 265419 1024 8 9992 11914 492553 682195 1024 16 14026 35475 353094 616490 1024 32 24047 58023 588851 263643 1024 64 19292 64289 1512948 1291406 1024 128 29432 32187 1145383 938625 1024 256 38714 82394 1424152 1035229 1024 512 41408 105112 1019987 692311 2048 4 5901 6262 352063 156945 2048 8 11921 14494 770549 253436 2048 16 20520 25097 221551 362279 2048 32 25634 36978 1190598 952130 2048 64 19516 22494 504169 720885 2048 128 17978 66597 317079 396199 2048 256 15517 38696 1454489 575933 2048 512 36392 68806 483155 974821 4096 4 7890 5503 350804 240628 4096 8 8588 10152 289692 223667 4096 16 16597 20445 375402 471226 4096 32 30865 25194 624204 655900 4096 64 24686 24073 975696 504743 4096 128 30418 27738 729605 983628 4096 256 43256 59404 1101640 715207 4096 512 50698 60289 1481942 758533 8192 4 6533 6820 250074 191500 8192 8 11547 14192 442838 545550 8192 16 13380 17887 607891 506461 8192 32 21202 22813 585396 685182 8192 64 25689 31424 805039 356015 8192 128 32384 53220 1269301 527768 8192 256 36450 38483 460927 585436 8192 512 30792 72766 648103 537006 16384 4 5955 7652 273595 238917 16384 8 15174 14861 345624 330222 16384 16 23232 26567 800312 571510 16384 32 27976 33219 700405 495508 16384 64 33546 56597 724119 606908 16384 128 34946 62407 908761 843403 16384 256 46130 85485 1022081 827767 16384 512 39401 63189 550258 533263 32768 4 8704 9917 321908 244502 32768 8 19807 17274 439509 322582 32768 16 17588 17174 348013 816040 32768 32 39064 31624 940584 810405 32768 64 26447 29148 872208 438449 32768 128 26039 36730 563420 517213 32768 256 43831 97791 1095700 666927 32768 512