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 Sep 10 01:08:24 2026 Auto Mode Machine = Linux oleg429-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-oleg429-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 1970 10037 542506 481234 64 8 3104 17099 780776 743988 64 16 2297 47269 198135 792299 64 32 4279 52843 1279447 1033216 64 64 9391 81103 1279447 297664 128 4 7101 11189 508012 571865 128 8 8636 18884 816154 162255 128 16 4869 53666 301307 1142750 128 32 8143 31357 1165070 1254941 128 64 12701 90844 1278855 731625 128 128 6817 28126 1319723 1939522 256 4 8035 12125 573946 572721 256 8 10694 21761 980760 764334 256 16 5968 29290 548161 609801 256 32 11222 10056 1175022 358056 256 64 6893 20782 1158540 488551 256 128 11889 43221 231719 1332507 256 256 18869 50373 1032636 1231629 512 4 8568 5752 105918 230520 512 8 8324 10960 856319 816594 512 16 10805 13732 992456 270198 512 32 14887 38676 746222 588544 512 64 26686 35368 1442420 1255246 512 128 31505 77906 960496 1333173 512 256 34044 127456 1642050 1368865 512 512 33180 81959 1616100 1506154 1024 4 8338 9238 418131 610965 1024 8 13147 14287 840041 359297 1024 16 12893 11706 606564 475169 1024 32 10685 19183 831100 1067654 1024 64 21444 23826 969780 414260 1024 128 26323 82893 821090 988529 1024 256 22998 28358 1466957 286029 1024 512 21150 58958 749060 859026 2048 4 4668 5687 247016 316833 2048 8 9988 6774 478953 362860 2048 16 11438 18920 361197 423403 2048 32 28704 31928 661079 643016 2048 64 34819 45566 815308 890443 2048 128 33952 45126 1448358 904603 2048 256 30095 60892 643016 522317 2048 512 25948 49214 575277 1001413 4096 4 4857 5241 319199 313416 4096 8 6146 7758 204768 258212 4096 16 13292 13729 585408 400502 4096 32 20241 25846 977083 202722 4096 64 19238 17251 707054 235767 4096 128 18579 26592 588416 452497 4096 256 17446 38118 452139 352524 4096 512 25682 31481 490477 348180 8192 4 6080 8437 202087 174714 8192 8 15902 17586 570401 417322 8192 16 18370 22029 855021 388268 8192 32 17000 23518 460711 359393 8192 64 23182 39789 757593 670645 8192 128 30351 30328 1004177 737558 8192 256 35677 54120 987694 627073 8192 512 40353 41879 574550 588595 16384 4 6840 9386 336523 303199 16384 8 10476 12594 601315 313262 16384 16 19862 20294 369499 322013 16384 32 24431 19415 774506 204636 16384 64 19335 48071 960093 672521 16384 128 31099 55799 1253186 550721 16384 256 35297 63341 1111537 789554 16384 512 34580 74755 935686 658864 32768 4 7258 7828 349503 276969 32768 8 12030 14477 492440 449208 32768 16 19882 22185 473628 520210 32768 32 23061 32848 753702 556816 32768 64 32356 54671 751472 873861 32768 128