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 Aug 27 16:47:01 2026 Auto Mode Machine = Linux oleg230-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-oleg230-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 1962 12066 608965 538156 64 8 2803 19081 720041 263480 64 16 4552 27316 889431 1066042 64 32 1707 56946 1279447 101265 64 64 3491 32673 703068 1232453 128 4 4193 9741 290859 354649 128 8 2547 8596 1254941 612303 128 16 3721 34161 1306873 866192 128 32 14081 26117 1278855 1145188 128 64 10394 42609 1346196 1802755 128 128 7489 48051 1040839 1939522 256 4 7680 8796 433169 458902 256 8 7765 13271 805021 426628 256 16 9305 18001 335879 944525 256 32 6143 36598 1219045 1168627 256 64 17545 55137 753077 1361224 256 128 9798 37317 1280084 407058 256 256 15834 111943 1673001 2305128 512 4 4562 6275 522399 596058 512 8 5063 10477 628322 823167 512 16 17335 34042 676414 746222 512 32 21177 49718 785241 834037 512 64 22136 43334 1340664 334457 512 128 11019 74799 1017858 1132755 512 256 16382 92187 875521 1570020 512 512 20686 88780 1772135 2032051 1024 4 3113 5423 800582 280244 1024 8 5267 13698 764119 768219 1024 16 7060 14721 1096268 587160 1024 32 27713 40943 970656 1074599 1024 64 32216 62560 1097388 1202127 1024 128 31729 69712 893517 572066 1024 256 35225 53361 1554004 1466957 1024 512 40709 40512 1146913 988301 2048 4 8836 7442 246385 268630 2048 8 8185 6044 503194 237666 2048 16 21096 30169 1117200 344606 2048 32 26509 42141 1257160 1092199 2048 64 30447 31372 1201926 1196902 2048 128 44066 40873 1259372 287482 2048 256 39783 72950 1668983 911417 2048 512 42028 116376 1130878 761059 4096 4 6078 6086 300621 182809 4096 8 6351 12458 690015 213234 4096 16 12093 17710 526944 572227 4096 32 34219 20774 352380 257026 4096 64 25044 50914 1496008 494501 4096 128 25761 40877 518358 910828 4096 256 37610 57694 580483 747444 4096 512 27240 43631 2209116 372029 8192 4 6085 6472 202968 198843 8192 8 8347 8890 288664 269401 8192 16 14203 17026 314158 459190 8192 32 22782 21525 291686 305556 8192 64 26161 36211 747783 622213 8192 128 22957 43803 858246 862772 8192 256 36186 46650 816828 822577 8192 512 37973 51187 1072106 803683 16384 4 6728 7033 498690 324102 16384 8 10032 12869 381635 402702 16384 16 15238 20847 369116 422149 16384 32 20597 21160 396516 348931 16384 64 22654 34991 826135 751354 16384 128 32735 38693 1082250 936554 16384 256 33009 38089 514198 407429 16384 512 37653 55629 1158945 779850 32768 4 6259 6981 379049 213400 32768 8 8486 12753 765374 503192 32768 16 20169 21104 421263 453223 32768 32 24388 30998 849023 516666 32768 64 23165 39928 1022338 950977 32768 128 28126 33456 844557 618799 32768 256 33725 41812 872972 923172 32768 512 30380 39446 891917 767220 65536 4