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: Wed Aug 5 09:12:54 2026 Auto Mode Machine = Linux oleg322-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-oleg322-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 1453 3746 571375 520419 64 8 1519 8752 720041 863676 64 16 5481 9533 955947 27777 64 32 1923 29011 1255511 955947 64 64 1769 69402 71434 1734015 128 4 2219 4700 615814 496272 128 8 3281 7608 907174 809997 128 16 2935 17980 1059322 1007629 128 32 2436 25207 1254941 992724 128 64 3009 36729 992724 1306873 128 128 7155 35573 1471662 2027414 256 4 2707 4816 229196 593947 256 8 5349 6520 686182 217145 256 16 7042 14762 1117543 768712 256 32 7525 17524 1128110 1016025 256 64 10195 47364 1298662 1142514 256 128 19874 69905 1398455 771473 256 256 16469 77343 1237306 1911233 512 4 9739 6164 671969 527792 512 8 11265 21169 673867 872320 512 16 23393 31970 1032540 293099 512 32 28466 24876 944860 812884 512 64 29465 19375 1388334 127524 512 128 17671 14930 1479181 1179413 512 256 16957 23292 1734911 267505 512 512 11135 20334 927315 1910902 1024 4 3088 3268 561154 253962 1024 8 12439 6231 79502 798053 1024 16 9455 13613 1020956 501935 1024 32 11322 17848 545822 399985 1024 64 12214 20122 1171629 1305935 1024 128 10510 42055 1199106 974400 1024 256 23412 88299 904621 1179999 1024 512 33896 42728 839384 628580 2048 4 4176 10003 309683 190511 2048 8 5292 8541 276873 211289 2048 16 6615 9832 1164293 209941 2048 32 12658 14714 289507 503194 2048 64 8589 13079 1575323 1209712 2048 128 10693 25846 1593737 114038 2048 256 15106 23568 317126 189909 2048 512 14877 24710 415659 1097501 4096 4 5521 2413 281167 213322 4096 8 7005 4753 122826 115794 4096 16 4400 7776 158006 385330 4096 32 5668 11483 320928 161565 4096 64 8805 16181 288365 413446 4096 128 13582 16302 403389 316564 4096 256 11347 17010 592249 1007392 4096 512 15639 40734 175778 213967 8192 4 2876 2792 199042 76232 8192 8 7621 8396 247695 110956 8192 16 11118 8891 264352 167576 8192 32 6456 9150 258185 217663 8192 64 9542 15529 425471 215234 8192 128 18183 43425 427403 512481 8192 256 17877 22826 209637 291770 8192 512 10008 14733 391698 370408 16384 4 2961 5310 203679 140076 16384 8 7993 9444 299086 232885 16384 16 12477 15021 376973 344208 16384 32 13913 24389 530002 625844 16384 64 20608 20791 1081961 662006 16384 128 19747 20088 644812 322176 16384 256 13698 20031 349339 224118 16384 512