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 Sep 5 17:18:10 2026 Auto Mode Machine = Linux oleg651-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-oleg651-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 2904 8607 581273 516414 64 8 3330 11777 929467 780776 64 16 3713 25683 969761 653436 64 32 5672 38458 1143223 460591 64 64 2739 35141 1421755 1526887 128 4 5304 12427 563463 436904 128 8 4321 7327 819893 774922 128 16 3815 17949 78826 985435 128 32 2978 12697 1252014 1017175 128 64 7471 51842 297632 1319723 128 128 4640 27205 1391557 1827299 256 4 2722 6344 633548 613985 256 8 6909 12998 985259 838988 256 16 10083 18243 521536 1032636 256 32 9942 11227 1112909 1123389 256 64 8334 48893 1262029 668246 256 128 12866 49932 933846 661657 256 256 12284 20506 711178 1952947 512 4 8571 10623 515131 502946 512 8 9292 17964 621233 145742 512 16 6762 18069 252205 694797 512 32 13464 49694 144506 812577 512 64 20764 65498 1017858 645703 512 128 24158 61821 1213400 1218910 512 256 15738 30699 1556366 1450212 512 512 13510 72398 408281 1753325 1024 4 3403 6120 160879 524364 1024 8 8840 13625 274389 321003 1024 16 14424 18013 1017088 189349 1024 32 11522 18733 916590 796868 1024 64 22692 38611 255351 1064479 1024 128 15651 65801 852716 482320 1024 256 36709 54432 1654579 959810 1024 512 38781 109076 1294520 919140 2048 4 11197 6899 170439 284955 2048 8 9819 11128 574623 389728 2048 16 12368 12200 1080249 365594 2048 32 25956 34427 663889 786782 2048 64 22046 25263 318407 414396 2048 128 19163 40400 408212 1179643 2048 256 24134 44805 480883 540254 2048 512 35371 23591 1027036 597277 4096 4 4982 5944 205272 205984 4096 8 8926 9347 301217 390808 4096 16 17418 20388 406876 680503 4096 32 21713 25660 554944 427160 4096 64 19916 29507 504047 404414 4096 128 23080 32215 491417 362476 4096 256 37592 55754 951909 820519 4096 512 35652 33647 705486 300758 8192 4 7103 7480 301451 205036 8192 8 10891 13340 373074 418384 8192 16 2760 19764 385121 481425 8192 32 20683 27107 583557 709079 8192 64 32175 37986 516619 806059 8192 128 26643 54551 588212 957901 8192 256 44525 45330 640206 771820 8192 512 42704 43712 498843 692236 16384 4 7047 8962 249805 167563 16384 8 10976 14734 456429 403707 16384 16 13963 16073 277389 272952 16384 32 12392 20786 285211 513603 16384 64 23028 30084 391203 739087 16384 128 20963 33157 780381 333958 16384 256 22244 70030 899189 883717 16384 512 29212 36186 556636 429395 32768 4 5513 7949 308442 405871 32768 8 12263 11089 747016 369725 32768 16 11933 11808 351184 245985 32768 32 14870 41613 293512 654350 32768 64 20410 23641 379069 321084 32768 128