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 12 00:08:38 2026 Auto Mode Machine = Linux oleg114-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-oleg114-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 1986 11418 447537 491815 64 8 4725 12570 852702 725882 64 16 2947 38978 789967 735831 64 32 6156 46443 365314 1049372 64 64 6038 58664 1562436 2067979 128 4 4564 10449 288981 272273 128 8 5911 15030 848397 794416 128 16 7550 33622 1206978 643108 128 32 9574 48155 1346196 1778862 128 64 5373 30754 948860 1220700 128 128 7685 88639 1196221 1471662 256 4 3329 6736 480463 310257 256 8 6638 6872 737558 557844 256 16 10616 29391 1015065 973645 256 32 14397 42036 1108314 582983 256 64 14698 53668 847597 1213534 256 128 12721 64208 1662639 1384034 256 256 16434 73650 1652404 2242541 512 4 7656 11706 584380 541227 512 8 13017 13369 878386 500951 512 16 7564 12991 875164 876593 512 32 5699 35960 1323315 104273 512 64 14882 45349 1075459 1770674 512 128 28630 88905 2207515 375643 512 256 23291 77717 1130370 772252 512 512 25308 68321 1176828 2225819 1024 4 7133 7911 90037 224505 1024 8 5011 6630 748016 387464 1024 16 16294 15218 668497 924283 1024 32 9910 18208 922497 1130014 1024 64 20388 57869 554990 509739 1024 128 14826 44187 492327 906339 1024 256 18226 53145 1438461 1256644 1024 512 16289 54329 434062 1416636 2048 4 5150 5846 279213 354563 2048 8 5352 8527 120398 207557 2048 16 7313 10588 260263 166057 2048 32 28757 40318 817559 420275 2048 64 32719 52334 1132668 735892 2048 128 17868 61163 837323 1014302 2048 256 37908 61468 1650385 581981 2048 512 16632 30446 837567 1535341 4096 4 10083 5680 184454 277225 4096 8 14419 13201 322646 225068 4096 16 10926 15596 419074 338707 4096 32 23575 23006 703176 683128 4096 64 23252 50168 588436 515806 4096 128 51860 55911 405704 384639 4096 256 20126 39937 398135 391253 4096 512 53580 90379 690847 609522 8192 4 5473 4981 232602 247267 8192 8 12588 14186 254535 281298 8192 16 18221 32547 515441 712225 8192 32 26586 24573 651495 566722 8192 64 24544 31498 732463 979529 8192 128 41224 45120 1217747 628794 8192 256 39778 59944 947494 1093151 8192 512 43232 56832 1173977 694644 16384 4 6321 8313 328941 250439 16384 8 9215 11990 456644 335333 16384 16 15169 18351 566722 542752 16384 32 17595 26884 873340 773007 16384 64 29428 32609 916433 694614 16384 128 32518 40766 876012 750009 16384 256 37442 51364 749804 716807 16384 512 46528 53396 969685 745874 32768 4 7483 6450 314050 214527 32768 8 12025 10497 461683 468864 32768 16 17889 22333 736674 587303 32768 32 22886 33784 791786 745303 32768 64 20515 28197 469227 940153 32768 128 32589 50527 930913 1005892 32768 256 30180 36241 818830 730301 32768 512 33253 41115 950787 661019 65536 4