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: Mon Nov 3 05:48:35 2025 Auto Mode Machine = Linux oleg352-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-oleg352-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 7130 17630 240575 231050 64 8 7239 25570 333126 361380 64 16 8359 43870 608965 598110 64 32 7547 62140 681644 799377 64 64 9066 72222 432398 1392258 128 4 9597 18790 231030 261785 128 8 13013 28834 334331 372102 128 16 13707 41816 559353 468553 128 32 20398 76100 895074 731625 128 64 14126 87855 1206978 969421 128 128 23835 83277 1123617 1217930 256 4 11978 20108 257318 254754 256 8 12422 30831 323240 606700 256 16 25048 48837 519266 580461 256 32 12276 76718 996229 537999 256 64 28225 86342 1112909 1142514 256 128 29223 91135 1286217 680960 256 256 17053 109971 1740810 1407621 512 4 10097 16626 242905 254326 512 8 21678 31387 417976 352115 512 16 26156 46554 691887 474078 512 32 35302 68083 929322 545904 512 64 43276 81412 868089 936209 512 128 39714 109846 1142396 1135750 512 256 39445 111866 1326585 1484293 512 512 53815 81542 1770674 2007358 1024 4 17477 19292 291405 238970 1024 8 23185 30193 417968 376196 1024 16 44475 50605 625923 716687 1024 32 45308 79311 966071 755118 1024 64 50274 114774 1080275 1014685 1024 128 58493 119345 1349004 1233900 1024 256 58507 108371 1768345 1361836 1024 512 58527 134986 1454537 2160657 2048 4 16443 18685 273001 265803 2048 8 27123 30338 444365 465029 2048 16 37465 53180 722401 566550 2048 32 58412 77452 1015382 966920 2048 64 71570 97999 695214 909391 2048 128 84544 121239 1315496 1198405 2048 256 75194 126193 531134 1425051 2048 512 91723 133977 2238241 1546675 4096 4 17553 19261 291719 284289 4096 8 29821 33628 546436 481541 4096 16 49030 57206 887903 802992 4096 32 59388 72934 1261110 969912 4096 64 69836 100219 1135573 1011127 4096 128 78895 113252 1503734 1268841 4096 256 89728 123956 1750403 1215430 4096 512 83165 122711 1726827 1556174 8192 4 16937 17523 308027 238034 8192 8 28640 31964 472598 437983 8192 16 42650 50671 794485 727208 8192 32 62780 72098 1350257 1263792 8192 64 76592 101289 1346922 1167633 8192 128 90004 125561 1456612 1462626 8192 256 92136 124712 1839602 1469130 8192 512 87813 127153 1755662 1327922 16384 4 17433 19342 294200 281314 16384 8 30260 33215 482178 524236 16384 16 46862 48839 736821 717653 16384 32 56366 78440 1029847 997875 16384 64 75483 100496 1372884 1075560 16384 128 80788 117665 1540146 1294668 16384 256 91456 114054 1744467 1398419 16384 512 95850 134296 2039346 1650608 32768 4 18497 20184 332316 324496 32768 8 31769 35363 506318 552141 32768 16 48935 55171 803356 726303 32768 32 66745 80444 1080598 1204180 32768 64 78789 98916 1373801 1402498 32768 128 79429 113365 1548803 1364526 32768 256 94881 122632 1837694 1509840 32768 512 93713 137801 2163343 1786016 65536 4