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 18 17:26:35 2026 Auto Mode Machine = Linux oleg246-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-oleg246-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 6722 19716 369844 842003 64 8 7546 27350 752329 929467 64 16 9384 42664 844652 778512 64 32 7665 66745 484710 763021 64 64 7991 28469 780776 1484662 128 4 16789 18851 667081 581781 128 8 13882 28169 790905 643108 128 16 17285 44991 1085013 1022989 128 32 22420 95958 2132084 969421 128 64 13094 111411 357483 1229084 128 128 20856 118076 1543594 630273 256 4 13542 14348 765970 536654 256 8 17377 24641 193334 962301 256 16 22456 52276 2114473 882426 256 32 32282 110344 1455317 901693 256 64 32985 89666 1163562 817898 256 128 29605 127238 1112909 1398455 256 256 30156 87912 1011241 3465855 512 4 11379 17769 375053 415630 512 8 15370 31500 1091308 707152 512 16 19178 49665 1077618 1123275 512 32 36234 98536 1329871 1589779 512 64 52463 96222 1472083 1145443 512 128 47024 113907 1391933 1182661 512 256 31974 131482 2486072 2275345 512 512 40836 181946 2152206 3653390 1024 4 17208 20213 601636 566110 1024 8 22262 38214 1319577 1015885 1024 16 33566 57938 1185209 884319 1024 32 54142 87873 1157109 1250425 1024 64 64084 113037 1947119 1312720 1024 128 77476 66966 1547286 1340164 1024 256 40636 150611 485756 1470977 1024 512 50041 104297 2035716 1718120 2048 4 15611 18507 631714 580840 2048 8 27181 39384 1006931 835612 2048 16 37739 51129 1083656 970087 2048 32 68591 88283 1747411 1872340 2048 64 65556 88753 1415424 1218982 2048 128 85007 139680 1382840 1156923 2048 256 76934 149455 2162727 1451540 2048 512 92615 162126 2041428 1518244 4096 4 16638 18598 667339 842819 4096 8 31135 34027 1207825 1173664 4096 16 46514 53919 1367192 1179384 4096 32 56212 77597 1398920 1377717 4096 64 86849 111653 1392683 1322667 4096 128 83152 147411 1824383 1545674 4096 256 98625 153707 2000961 1738535 4096 512 89130 148729 1785514 1637143 8192 4 16416 17712 507935 813752 8192 8 29021 29753 1097832 839090 8192 16