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: Fri Oct 2 09:32:45 2026 Auto Mode Machine = Linux oleg225-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-oleg225-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 2293 7268 645579 512471 64 8 2050 18028 760859 703068 64 16 3474 23348 760859 210404 64 32 1796 30332 955947 1143223 64 64 2579 40660 1163036 1392258 128 4 2225 11307 598647 95668 128 8 3092 21351 940549 85044 128 16 6960 18526 595328 1007629 128 32 2910 22342 1209698 927549 128 64 4884 66151 1436229 1142750 128 128 6428 72728 1421023 1526043 256 4 5339 7644 330300 414923 256 8 5804 5995 750445 125249 256 16 4771 24276 199069 518263 256 32 11013 11961 1430119 996229 256 64 4131 46133 1361224 638445 256 128 2770 30253 413485 807442 256 256 4361 85880 910872 1842366 512 4 3700 2962 463738 385558 512 8 9027 13750 298726 189409 512 16 13479 11727 697505 570865 512 32 4892 19051 682649 875164 512 64 15061 13489 1101383 1158418 512 128 7657 33111 831132 892254 512 256 14801 55489 663252 1322500 512 512 21274 60880 124025 539459 1024 4 5655 2280 146142 61745 1024 8 8900 14222 479627 462729 1024 16 13838 18823 1367037 180031 1024 32 15125 14253 573365 107506 1024 64 25637 51003 1412443 708646 1024 128 13240 42172 1139005 635274 1024 256 10395 33461 293496 394728 1024 512 25726 60316 1563053 1473500 2048 4 6552 5728 163696 117688 2048 8 13405 10217 619862 295564 2048 16 14761 22037 593809 880855 2048 32 27006 20753 414496 198506 2048 64 17442 26924 529334 1101159 2048 128 16461 26696 228883 285837 2048 256 16859 43284 647915 870060 2048 512 26653 35196 451702 245182 4096 4 4914 3667 159844 177531 4096 8 6333 8023 215330 290392 4096 16 14148 11916 217365 166260 4096 32 17662 16615 472054 439531 4096 64 17182 15376 707316 528110 4096 128 1547 27400 246954 264038 4096 256 21978 32178 759639 865754 4096 512 40048 35958 593887 353591 8192 4 3448 4630 263130 242768 8192 8 11065 17542 479852 241866 8192 16 13458 14501 645498 513799 8192 32 26953 21599 699694 563220 8192 64 22817 31818 1082475 881249 8192 128 18085 41310 521789 545732 8192 256 26861 40456 345842 484562 8192 512 31262 27609 329366 174953 16384 4 4577 5438 429529 204251 16384 8 8562 10477 369350 440123 16384 16 13091 13144 468088 249885 16384 32 17265 26921 262345 344251 16384 64 15267 32697 872043 729221 16384 128 20943 24635 311122 365346 16384 256 18439 24549 505867 650365 16384 512 19221 30564 398203 332076 32768 4 4276 6264 243657 250057 32768 8