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 Jun 11 19:03:17 2026 Auto Mode Machine = Linux oleg420-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-oleg420-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 1610 7398 500060 538156 64 8 5112 12376 666414 754443 64 16 2418 16611 877797 733819 64 32 6460 63179 249057 1232453 64 64 4071 51773 1363961 1562436 128 4 5254 12095 680612 425478 128 8 8097 17208 584313 165813 128 16 4564 14220 776042 636249 128 32 6504 14409 266595 881842 128 64 8904 50874 1093856 312169 128 128 15211 41477 502309 1755594 256 4 3650 7563 347398 458706 256 8 6990 5007 242883 221856 256 16 18339 30888 1219045 1036624 256 32 6438 31749 1019886 612584 256 64 21069 28131 1447470 768712 256 128 20197 84262 1254656 1561112 256 256 22309 41809 673696 396828 512 4 3932 4206 427376 185226 512 8 9029 20707 369630 529483 512 16 11638 37900 784094 873740 512 32 19725 31347 1014013 190197 512 64 20345 59723 390536 202845 512 128 13396 95593 97858 1442420 512 256 13512 56505 1520013 584380 512 512 18588 35078 240484 2065273 1024 4 7304 4776 100343 353471 1024 8 5457 8252 194054 161770 1024 16 15385 21279 237424 293155 1024 32 22378 33343 131381 356552 1024 64 21597 66510 814550 664978 1024 128 36163 52963 546377 806899 1024 256 44949 103506 617998 888894 1024 512 24279 40764 1521524 756315 2048 4 10815 7440 388917 119774 2048 8 6967 15514 372361 391504 2048 16 11661 15706 761937 212140 2048 32 42044 38901 549516 1161617 2048 64 30564 60189 847316 832938 2048 128 36592 37179 456236 980384 2048 256 35622 100668 541650 804089 2048 512 20752 38956 1665101 229414 4096 4 4386 5080 141778 232148 4096 8 15180 1170 604035 487734 4096 16 11854 11302 456331 416009 4096 32 17511 33280 698743 540013 4096 64 15219 45655 517765 588577 4096 128 41028 51448 566921 764882 4096 256 23411 20396 648203 876532 4096 512 20796 38115 460947 327392 8192 4 3789 5675 403824 227453 8192 8 12514 8562 244588 276130 8192 16 9809 22957 399008 292478 8192 32 15477 20603 370344 301198 8192 64 22043 19827 887165 579805 8192 128 25690 32349 778112 493555 8192 256 37889 42781 673076 352372 8192 512 30495 41412 1061016 861863 16384 4 4761 6799 360690 246557 16384 8 13281 10029 228364 195226 16384 16 12279 13465 278284 272326 16384 32 18854 23554 351391 278171 16384 64 21964 31546 947269 718343 16384 128 24795 38236 1109276 660270 16384 256 33531 41986 554659 348520 16384 512 47029 56175 774401 563178 32768 4 7385 6879 260551 329937 32768 8