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 Nov 14 16:01:10 2025 Auto Mode Machine = Linux oleg209-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-oleg209-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 3277 6476 294723 318502 64 8 5656 21672 340306 274809 64 16 3217 44290 532815 394870 64 32 4111 54013 799377 712397 64 64 8029 71835 886494 1518251 128 4 3679 11631 36046 33093 128 8 2785 6474 386848 436904 128 16 8981 32538 707520 584313 128 32 3510 57922 826202 262810 128 64 11229 92280 1209698 870405 128 128 11006 64974 677178 1451764 256 4 10689 12491 73034 243103 256 8 7652 27769 416856 348300 256 16 12534 20696 668246 510866 256 32 17706 29452 879535 465466 256 64 9599 39919 1118707 891956 256 128 16355 92279 1600674 1070737 256 256 16126 63333 131476 1430119 512 4 3484 8213 288958 70708 512 8 19015 24965 476709 403146 512 16 18283 16585 98328 570258 512 32 13101 66131 798675 379226 512 64 9562 71769 664073 547017 512 128 18492 34369 1245780 1055375 512 256 19669 84921 351423 70163 512 512 29510 32048 1541840 1537424 1024 4 8502 10756 179556 186690 1024 8 18983 26265 427921 265501 1024 16 22899 40567 643652 484168 1024 32 31287 34242 853903 852716 1024 64 28259 48938 649394 384550 1024 128 37255 41418 790125 882865 1024 256 28923 102738 1368780 1214706 1024 512 28183 65143 280628 948157 2048 4 7172 6809 235832 112887 2048 8 7357 19826 289517 354870 2048 16 28480 27273 690298 298979 2048 32 41411 27277 922874 643835 2048 64 46118 88451 905843 964207 2048 128 55602 82888 975263 1171598 2048 256 57884 89511 1271301 1227167 2048 512 49693 105856 1557613 1027036 4096 4 7469 7252 79234 47423 4096 8 11747 11715 394678 287963 4096 16 30277 17009 301529 246345 4096 32 24378 22589 656627 295522 4096 64 37122 35064 271349 323484 4096 128 33384 62746 1423729 339410 4096 256 37798 53266 399338 1232255 4096 512 71170 48463 1499272 377755 8192 4 5873 8468 175376 133121 8192 8 10245 2202 219771 346603 8192 16 18006 14832 729091 401587 8192 32 22379 18465 872876 242316 8192 64 27035 33181 383951 412487 8192 128 19171 39050 995017 934836 8192 256 21755 33531 407744 369023 8192 512 36879 44755 320676 269163 16384 4 6028 6296 102501 84492 16384 8 10793 8708 158419 101938 16384 16 27392 21902 176679 390729 16384 32 35241 29140 781526 622945 16384 64 30080 32763 349598 713955 16384 128 35248 43576 927428 760559 16384 256 45246 35586 579286 740321 16384 512 44971 42552 401509 292305 32768 4 7205 5892 65586 124683 32768 8 11780 10081 158540 171162 32768 16 15657 19888 345166 559735 32768 32 33798 33423 484990 371961 32768 64 31077 40779 441671 831362 32768 128 30757 38403 307770 472222 32768 256