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 19 02:19:41 2026 Auto Mode Machine = Linux oleg327-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-oleg327-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 2502 6322 363829 598110 64 8 5838 12769 771797 260160 64 16 6729 28661 1083249 789967 64 32 2445 8947 1336792 1304314 64 64 6402 23738 799377 1638743 128 4 4117 4194 376538 566435 128 8 6749 18241 907174 753179 128 16 4578 6967 969421 63747 128 32 6623 58154 492178 348661 128 64 8152 21676 1406136 881842 128 128 10333 39323 1561553 2004703 256 4 6694 4237 462260 123251 256 8 4170 20283 603970 805021 256 16 13075 33732 844929 870974 256 32 17160 18873 1361224 1016025 256 64 27039 40953 1391207 1248819 256 128 19982 96569 1422540 675391 256 256 14726 29270 194068 2045979 512 4 4266 7040 263242 154397 512 8 11636 10055 887094 571472 512 16 7545 23678 1216149 657364 512 32 12375 26389 1036527 849208 512 64 27283 62347 1267845 1100818 512 128 25081 55102 788992 157200 512 256 16957 103704 946526 1216149 512 512 32722 107493 1455126 1299295 1024 4 6093 7052 621755 245387 1024 8 10249 9689 869284 345593 1024 16 10979 12645 725157 677246 1024 32 10858 19406 162775 800582 1024 64 28666 24971 723691 1259592 1024 128 35213 43268 1670669 764663 1024 256 19924 38429 1284839 874417 1024 512 35045 70952 719087 1635675 2048 4 5102 6405 166275 192393 2048 8 9338 9690 210183 829159 2048 16 14536 32520 1124071 567936 2048 32 31147 18892 405304 279585 2048 64 31302 30251 317172 506428 2048 128 35888 57358 505177 798706 2048 256 40892 37176 245561 389569 2048 512 27410 33859 688858 606813 4096 4 6906 6114 263241 343763 4096 8 12786 11474 317177 595266 4096 16 15118 18931 620709 535151 4096 32 20554 30993 567951 524996 4096 64 23097 1611 1487330 379583 4096 128 22779 35790 618808 478177 4096 256 32126 48414 1015610 1451394 4096 512 28890 45997 446580 579269 8192 4 6119 6959 269349 289255 8192 8 8386 15162 487269 382374 8192 16 17128 13250 726040 431065 8192 32 18510 29738 299865 473256 8192 64 23285 36807 597697 735049 8192 128 27327 48308 1588830 394242 8192 256 30994 48785 1241956 571264 8192 512 37857 55045 765236 610700 16384 4 5490 5931 246476 161199 16384 8 9103 10375 277111 305300 16384 16 15509 17383 660003 525198 16384 32 21029 25914 402624 376547 16384 64 21758 37714 708529 337167 16384 128 33580 42903 629306 514445 16384 256 37169 44680 943938 982130 16384 512 47656 44235 355879 405805 32768 4 6712 6022 203076 311684 32768 8 12195 11987 481855 471849 32768 16 18953 16460 561856 373926 32768 32