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: Fri Aug 14 21:16:41 2026 Auto Mode Machine = Linux oleg318-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-oleg318-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 2920 7461 653436 241440 64 8 3936 22478 852702 105774 64 16 3833 22751 1066042 1163036 64 32 4152 29616 1330167 780776 64 64 6451 23818 1066042 380864 128 4 3310 11580 743788 1085013 128 8 5862 19016 800337 735635 128 16 4495 19005 1114289 1000121 128 32 6687 15859 699227 821147 128 64 9878 21397 1085013 1663139 128 128 4396 72817 1319723 1885042 256 4 6471 6261 556687 330300 256 8 6465 16294 423933 889002 256 16 5051 23653 1224606 768712 256 32 15019 29048 1093639 1132871 256 64 10164 37825 1237306 1274008 256 128 12607 36950 1881098 479390 256 256 12018 64844 1600674 907792 512 4 4603 6554 605128 552932 512 8 11997 19565 906185 775599 512 16 7104 16041 587738 857687 512 32 14314 23693 1166599 563376 512 64 13855 24525 1556366 1158418 512 128 19935 39741 533297 1383861 512 256 21411 55219 645703 1179413 512 512 14547 72194 1070633 891884 1024 4 5251 5943 222990 374132 1024 8 7577 15237 329146 177714 1024 16 15565 19073 607336 726138 1024 32 14576 21181 784067 830457 1024 64 30684 55543 694214 745808 1024 128 19167 34049 600207 148082 1024 256 32282 88228 1398645 1406431 1024 512 29014 54331 1577984 1340582 2048 4 7003 7935 414496 150189 2048 8 15792 8553 684958 554267 2048 16 21243 23289 499130 293073 2048 32 20820 34177 278074 387950 2048 64 27729 45922 717094 337843 2048 128 37035 35150 757636 801613 2048 256 32174 37394 420811 1473451 2048 512 34044 74259 1062873 256195 4096 4 6024 5530 275827 162765 4096 8 13339 12255 473185 336070 4096 16 16280 20505 1207909 278713 4096 32 18287 23950 363704 356171 4096 64 31031 27329 1474438 413446 4096 128 33441 37796 354349 679723 4096 256 42471 40271 686211 1475071 4096 512 35840 36029 394832 872216 8192 4 5963 6744 193339 271906 8192 8 8838 12323 355787 506961 8192 16 12073 12215 469159 368493 8192 32 2808 38905 491627 850050 8192 64 31018 59739 1341192 772827 8192 128 34721 40451 340952 608569 8192 256 26840 39112 412072 838660 8192 512 44253 48710 1741867 499634 16384 4 9754 8028 247723 161438 16384 8 8824 7210 584847 344043 16384 16 19781 21665 642557 295425 16384 32 18014 23544 784300 395003 16384 64 43193 67051 585979 496966 16384 128 26287 32349 972746 809771 16384 256 31658 41199 482832 495026 16384 512 28282 47507 1014417 868988 32768 4 6333 6661 187441 211155 32768 8 11191 8812 820159 511169 32768 16 15513 14148 572297 546999 32768 32 19562 19954 467446 459243 32768 64 19105 22900 571149 320228 32768 128 23495 34515 807790 627882 32768 256 31165 47604 1119895 385356 32768 512