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: Tue Sep 15 20:39:18 2026 Auto Mode Machine = Linux oleg233-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-oleg233-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 1713 4842 621657 546928 64 8 3369 6471 471099 608965 64 16 4105 27608 225423 186051 64 32 4638 43536 1163036 929467 64 64 4914 30929 969761 1879725 128 4 3809 9916 615814 486822 128 8 1505 8879 780556 609522 128 16 9845 4365 335166 809997 128 32 10001 39349 819893 615814 128 64 2046 17699 52957 1093856 128 128 6341 78826 1526043 631014 256 4 7421 3420 342741 477684 256 8 12756 18228 792543 387939 256 16 9136 60009 1028679 679237 256 32 10579 66215 1147398 672010 256 64 5215 34078 1208072 1558845 256 128 23902 70581 1447470 1062263 256 256 19718 78000 1274008 2081678 512 4 3792 4879 450697 281017 512 8 11897 7920 837942 239145 512 16 25793 33096 778128 591951 512 32 27193 49626 674502 592604 512 64 38183 54031 825699 655558 512 128 11320 39686 1329871 105809 512 256 16753 85561 1640796 1312798 512 512 35831 95682 1429934 1895721 1024 4 6360 4993 237477 182758 1024 8 11552 20528 764255 707245 1024 16 22879 24737 1040496 569186 1024 32 11907 16367 1088213 703884 1024 64 33975 50638 749060 1072185 1024 128 34669 86927 960454 75800 1024 256 19559 32891 1031252 417278 1024 512 28084 101992 1530742 1414304 2048 4 4084 5907 251536 632878 2048 8 12445 8522 813301 154470 2048 16 9826 8678 501110 440626 2048 32 22312 40085 653485 1126429 2048 64 30563 43058 408775 722887 2048 128 22603 37283 1470172 300643 2048 256 26771 83459 1230860 1455475 2048 512 27413 23768 329207 235348 4096 4 6697 9406 236801 194501 4096 8 5745 8827 298304 214023 4096 16 15576 15494 387958 167903 4096 32 18765 24784 563814 864100 4096 64 21103 22070 1423729 303339 4096 128 18476 24356 417232 581741 4096 256 22286 33636 444592 792399 4096 512 23895 78076 1105183 964413 8192 4 6785 5111 174320 287864 8192 8 6804 8202 402320 389536 8192 16 13830 19569 351435 266702 8192 32 17977 20969 713897 584440 8192 64 25405 30869 329764 399142 8192 128 25763 34531 422116 387126 8192 256 25021 48382 618127 325688 8192 512 30127 51323 621447 797342 16384 4 5122 5874 373390 304172 16384 8 10578 11057 574612 328711 16384 16 16384 19885 612370 432182 16384 32 19901 26196 728208 600281 16384 64 24257 28310 573691 879060 16384 128 30828 37478 806738 760097 16384 256 26748 37822 640801 973393 16384 512 34029 48309 1005408 1162651 32768 4 4884 5543 241487 348313 32768 8