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: Sat Jul 18 18:23:16 2026 Auto Mode Machine = Linux oleg312-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-oleg312-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 9208 21269 551422 548044 64 8 13625 22008 855419 754443 64 16 11142 37471 1392258 809014 64 32 15259 58130 1124074 361867 64 64 19335 81745 1492919 1828508 128 4 12396 17701 800337 554157 128 8 13147 32306 962469 481150 128 16 21592 47160 1076312 940549 128 32 20853 80613 595328 1142750 128 64 28868 89690 1175271 1254941 128 128 21212 122132 1152564 1663139 256 4 13154 16613 746272 507006 256 8 20956 30199 770920 785584 256 16 27115 53079 1248819 1543163 256 32 26120 55689 2441400 1094754 256 64 43589 135303 1600674 1447470 256 128 39689 135508 1911233 1523457 256 256 47726 148228 1489641 1911233 512 4 15446 18859 563968 540681 512 8 26030 34455 833713 828566 512 16 23186 51062 2047551 882718 512 32 28832 75205 1127995 944860 512 64 45620 76863 1556366 1036527 512 128 40528 154175 1024169 1480200 512 256 38667 136749 1829505 1475116 512 512 52632 171239 1947291 2253852 1024 4 14999 18246 600963 597036 1024 8 24447 27591 865605 590470 1024 16 35586 50453 1183575 800582 1024 32 48393 77004 1492963 911146 1024 64 48831 113575 379554 1207534 1024 128 69537 108984 1703807 1268896 1024 256 58004 148492 655539 1738989 1024 512 68595 145909 1490373 1648862 2048 4 15938 20225 608446 468964 2048 8 23144 28947 1168888 385184 2048 16 34335 42962 1194904 1125249 2048 32 49402 69775 1398828 1108835 2048 64 39152 85319 1149185 981728 2048 128 66433 83153 1470172 1210394 2048 256 75868 97070 976261 1863809 2048 512 59889 113544 1571864 1230683 4096 4 15382 16792 580993 706443 4096 8 26383 28558 995426 896661 4096 16 45631 49004 1114866 870933 4096 32 48197 65801 1642308 861413 4096 64 73230 111937 1422315 995426 4096 128 71748 131459 1414352 1469645 4096 256 90433 113005 1791845 1365344 4096 512 91206 123585 1840212 1479772 8192 4 15806 14320 349145 562566 8192 8 19584 25898 626638 566097 8192 16 40266 46684 982610 993808 8192 32 58622 66838 897852 1310299 8192 64 71475 89696 1501487 1188268 8192 128 78727 119601 1219952 1128850 8192 256 84598 138626 1170777 1337277 8192 512 92675 147478 1489704 1396748 16384 4 15569 16110 683151 622071 16384 8 27858 28516 706120 757850 16384 16