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 Aug 15 15:01:54 2026 Auto Mode Machine = Linux oleg423-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-oleg423-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 3002 7765 380864 557144 64 8 1805 7126 608965 234481 64 16 4159 8264 1124074 576282 64 32 6167 23364 1330167 1029254 64 64 3330 53969 608965 703068 128 4 2620 8090 621518 563463 128 8 6515 9612 757430 238736 128 16 3479 15583 1093856 866192 128 32 4649 20711 1266785 1145188 128 64 7747 46479 1561553 1373754 128 128 7735 13767 1421023 2132084 256 4 3067 11705 644965 468717 256 8 3707 14935 516022 475779 256 16 8550 27170 1147398 599585 256 32 12151 21516 1108314 102978 256 64 10500 42560 1422540 1354356 256 128 8171 57102 1662639 1588832 256 256 5985 45092 1707589 1354356 512 4 8627 9829 182132 154486 512 8 11714 12975 684390 633699 512 16 14677 27560 816594 405047 512 32 9651 29087 1309596 1164070 512 64 10913 27859 1344020 1168504 512 128 15750 51769 1406520 1333173 512 256 16507 83469 1677976 1021732 512 512 11672 90474 993834 1700565 1024 4 7162 6678 238307 386418 1024 8 15495 12153 631259 849848 1024 16 18451 16776 808265 684914 1024 32 19559 17449 665390 810859 1024 64 14852 30624 975063 720655 1024 128 26171 37528 1556257 789544 1024 256 28938 73679 1592612 1172909 1024 512 33563 74106 859714 1711956 2048 4 6536 7113 242504 411241 2048 8 10278 10133 503194 469836 2048 16 13285 25068 654480 643016 2048 32 21504 23167 1381950 1155834 2048 64 22137 28214 876720 1261777 2048 128 25774 54425 1651337 1005399 2048 256 38608 69852 1168252 401158 2048 512 31895 47282 370610 774579 4096 4 6511 6283 121755 257030 4096 8 9995 11584 574389 353868 4096 16 15404 24327 459455 371892 4096 32 17890 39933 678836 861197 4096 64 32619 45462 704994 834387 4096 128 47229 75252 959940 1057886 4096 256 54567 77465 1010057 837478 4096 512 22649 75715 1182469 977305 8192 4 6500 8972 360245 327326 8192 8 10675 13585 533778 549098 8192 16 17834 15572 815684 428250 8192 32 19849 23929 962759 481176 8192 64 22039 31298 997211 473060 8192 128 38346 45181 1121591 527630 8192 256 35492 47546 1457168 921276 8192 512 41951 52283 1076911 920141 16384 4 7694 7113 325117 295564 16384 8 16010 20467 560692 368319 16384 16 29219 28181 742770 815934 16384 32 29613 37576 1009915 673576 16384 64 42373 34573 1301140 486375 16384 128 43773 66898 353812 296360 16384 256 21381 36253 511839 829066 16384 512 36622 31818 294936 273266 32768 4 4462 5570 322500 195272 32768 8 10831 9425 954836 279495 32768 16 19317 16975 346256 556192 32768 32 27089 36991 590637 558913 32768 64 38520 45612 570651 469975 32768 128 33198 28671 412914 751957 32768 256 26119 34952 438602 581302 32768 512 27348 38539 1277102 908352 65536 4