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: Thu Aug 27 07:39:43 2026 Auto Mode Machine = Linux oleg321-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-oleg321-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 7653 16772 752329 507625 64 8 8861 23087 763021 666414 64 16 11255 57854 1599680 842003 64 32 11880 77969 1363961 261427 64 64 10433 81005 2561267 1690338 128 4 9849 16552 621518 529038 128 8 5768 21195 579270 439767 128 16 20450 55849 1543594 250897 128 32 15221 54980 2066432 1057236 128 64 8061 44646 1254941 1254941 128 128 27597 94957 1487977 1705404 256 4 16159 18922 618584 446684 256 8 22334 45886 917880 719277 256 16 29698 20192 1142514 963164 256 32 23825 69924 1312954 1208072 256 64 30655 53444 433869 955451 256 128 23916 93737 1495866 921029 256 256 15057 160985 362162 2114473 512 4 12223 16735 575300 464139 512 8 13518 30844 399026 407971 512 16 20025 15985 778128 644927 512 32 31103 49669 408670 949875 512 64 40679 97357 1344020 1176828 512 128 33427 141479 1730717 1467055 512 256 33950 153481 1657257 1854787 512 512 32949 157581 1829505 1869318 1024 4 10842 17773 596705 642400 1024 8 19289 28987 984450 310850 1024 16 22487 47446 719087 844168 1024 32 31192 49335 1101046 1172909 1024 64 34529 100956 821247 1149368 1024 128 39999 107350 817340 317421 1024 256 51879 100451 1454537 1544504 1024 512 29347 94013 1444266 540941 2048 4 13089 11639 228165 433161 2048 8 9400 16303 923370 495273 2048 16 18997 22272 1013345 480641 2048 32 42301 30377 352728 569367 2048 64 14461 47224 234084 216672 2048 128 31459 37516 628387 472993 2048 256 28828 48280 215536 376342 2048 512 41113 34818 535972 1479797 4096 4 13139 5428 359202 313628 4096 8 15841 9562 354693 343159 4096 16 19997 24563 471239 261343 4096 32 22866 43240 1104970 401410 4096 64 18421 27171 437271 210128 4096 128 46495 43615 430381 426884 4096 256 29176 52632 830193 997333 4096 512 44229 42577 966746 1515272 8192 4 8766 9033 468066 341803 8192 8 14923 9874 228061 340199 8192 16 2133 24304 551646 472300 8192 32 17756 39289 619386 801097 8192 64 38182 69682 448485 575156 8192 128 35260 52039 555499 517436 8192 256 34467 68461 371718 795644 8192 512 25686 92471 914995 784311 16384 4 10112 9683 451360 386351 16384 8 8514 12872 745202 481813 16384 16 19548 22731 879724 949730 16384 32 32314 41109 656360 332576 16384 64 41814 44049 538183 680257 16384 128 33241 64576 972058 1184761 16384 256 60034 62360 882378 871402 16384 512 31800 53708 821209 550518 32768 4 9588 13125 245231 340493 32768 8 15292 24643 1004510 893297 32768 16 29860 57837 1298715 1186559 32768 32 62654 85386 1457576 1351870 32768 64 81467 120870 1802010 1451327 32768 128 78139 163063 1744020 1427302 32768 256 56483 117625 1953956 1518581 32768 512 87081 59996 1856961 934839 65536 4 12993 11581 676716 396580 65536 8