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: Mon Jun 1 14:26:45 2026 Auto Mode Machine = Linux oleg347-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-oleg347-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 1714 5522 639427 576282 64 8 2145 23632 877797 818885 64 16 5721 25245 942521 877797 64 32 4756 52074 1421755 1033216 64 64 2427 60041 193843 1017549 128 4 2713 6392 531131 245729 128 8 6664 14838 914904 586868 128 16 4258 8293 1196221 978253 128 32 8441 39274 927549 1040839 128 64 5608 52894 492178 1059322 128 128 10183 40149 1332828 1526043 256 4 6468 3739 211208 91524 256 8 9559 18463 670332 414923 256 16 8337 28877 420942 999940 256 32 5559 23553 1201314 1040643 256 64 11686 84209 1306564 1163562 256 128 13380 53973 58848 844929 256 256 8277 31565 807442 2305128 512 4 5930 4861 149527 601568 512 8 8422 16494 147900 414908 512 16 9162 25616 928920 622855 512 32 17480 49897 1034530 1125630 512 64 16263 43304 1610042 1264113 512 128 10502 48563 1282994 262952 512 256 15281 54629 557237 295438 512 512 30663 105264 829847 2275345 1024 4 7320 5105 365815 378951 1024 8 8388 16126 185409 295597 1024 16 10375 13316 1137798 367411 1024 32 10121 38693 741047 543473 1024 64 17466 54871 729964 775712 1024 128 15671 50216 1535119 722595 1024 256 20973 62618 230889 972414 1024 512 37087 67036 1248970 723203 2048 4 4458 5172 686326 264738 2048 8 7562 7936 368622 147540 2048 16 16987 16924 1154436 447164 2048 32 17300 29377 1367213 584317 2048 64 25246 24894 1422220 346524 2048 128 22806 35844 888141 942932 2048 256 48314 77699 1165715 1425997 2048 512 61599 93124 1140942 411655 4096 4 6386 6603 483248 257222 4096 8 11558 12478 599441 401804 4096 16 25643 27824 640303 414944 4096 32 18772 23766 790394 405665 4096 64 30191 41452 789958 937929 4096 128 28564 44192 1060040 725323 4096 256 47796 61646 954341 727904 4096 512 59862 80568 1117912 996349 8192 4 7357 6447 453074 597645 8192 8 17234 13085 421742 387161 8192 16 17797 21202 261559 605428 8192 32 31696 39820 612770 1234638 8192 64 27139 29172 813251 568655 8192 128 43099 56705 1092734 381466 8192 256 42190 82253 774499 372941 8192 512 26258 37123 789211 763824 16384 4 4490 5377 278365 225457 16384 8 11803 18554 413811 440594 16384 16 13424 30077 1061143 697484 16384 32 28124 21026 351965 360897 16384 64 29061 30876 725311 593361 16384 128 31012 72940 668491 528583 16384 256 40759 39337 691337 813336 16384 512 33016 92233 929749 420900 32768 4 6922 9670 458626 341315 32768 8 9467 10860 384082 529901 32768 16 18510 20431 543514 410169 32768 32 16508 26498 641755 605770 32768 64 29852 31620 681914 801702 32768 128 36013 53440 890726 948176 32768 256 32042 50396 1130795 934388 32768 512 41517 61194 1169744 890334 65536 4