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 19:59:15 2026 Auto Mode Machine = Linux oleg242-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-oleg242-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 3218 6684 653436 520419 64 8 5925 17153 306151 557144 64 16 3201 22260 983980 566551 64 32 2696 12436 1210227 313664 64 64 4517 27139 1002351 532815 128 4 3299 7858 753179 544601 128 8 6712 20148 1000121 723735 128 16 2897 12404 263973 940549 128 32 7771 32684 1024942 1142750 128 64 7373 26096 1852520 1332828 128 128 5749 38381 1487977 1833539 256 4 9736 13293 616807 559005 256 8 11189 12028 518263 555535 256 16 14486 32707 1190657 1004618 256 32 17425 78865 1321031 1137672 256 64 19629 46478 130216 1319408 256 128 18256 64993 1137672 1461259 256 256 11974 88645 1158540 2242541 512 4 9074 4150 221166 345988 512 8 7511 5754 826971 324451 512 16 11163 37531 1122687 690996 512 32 17633 43112 1150351 982467 512 64 31872 62569 882718 816594 512 128 25352 84754 1429934 1383861 512 256 36155 84560 1556366 772252 512 512 34311 121816 1695195 2187279 1024 4 6300 4178 408779 161794 1024 8 7244 15754 838565 162930 1024 16 11351 12832 1090423 662414 1024 32 19130 44073 599955 606650 1024 64 27800 65227 1154311 1424152 1024 128 28414 55794 1551758 331713 1024 256 34158 84355 676819 1105865 1024 512 52805 96987 1045053 333439 2048 4 5593 8632 309081 312488 2048 8 7112 8311 396199 220952 2048 16 13048 13272 833181 285913 2048 32 25447 25177 454210 460541 2048 64 34026 30202 1360715 702836 2048 128 23802 40663 1992189 494817 2048 256 38807 35223 639617 143096 2048 512 26842 39957 912676 647475 4096 4 7264 5782 324688 262529 4096 8 10623 9675 462510 476229 4096 16 6824 14737 448036 595947 4096 32 20543 24652 341705 273940 4096 64 16112 38332 1871281 539792 4096 128 28201 44736 831841 892191 4096 256 26288 36088 1641680 396820 4096 512 20552 61294 266893 517032 8192 4 5814 7988 429191 411268 8192 8 13413 12683 200636 133790 8192 16 12357 24619 792652 800855 8192 32 20827 31193 630884 685360 8192 64 26340 37481 691011 300382 8192 128 29164 35664 1459458 511558 8192 256 31144 34451 476994 915824 8192 512 31972 58410 685702 582321 16384 4 5276 4387 469832 366146 16384 8 7426 9021 444361 296489 16384 16 14644 18332 753388 496575 16384 32 19926 26299 742232 671470 16384 64 22713 35091 766250 719042 16384 128 25030 33564 847511 710522 16384 256 39230 67422 1263114 819847 16384 512 35041 33303 848076 678450 32768 4 9087 6557 272130 267340 32768 8 11384 14259 339814 501123 32768 16 19714 24960 766091 633578 32768 32 20606 33133 389372 367445 32768 64