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: Wed Aug 26 04:49:44 2026 Auto Mode Machine = Linux oleg359-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-oleg359-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 2864 7980 639427 520419 64 8 3772 12590 818885 743988 64 16 5714 40531 904414 1226821 64 32 3962 49610 1363961 1101022 64 64 5540 10064 1033216 300665 128 4 5749 14189 597981 267791 128 8 8874 22339 391360 780556 128 16 6581 26851 330015 962469 128 32 9368 33410 1196221 871818 128 64 3929 69070 1440082 1346196 128 128 11771 65171 1579934 1705404 256 4 3316 8366 639967 245718 256 8 8165 18683 903970 656399 256 16 9088 33840 1036624 109299 256 32 12707 32587 365740 453858 256 64 21097 68562 1339154 1266495 256 128 16132 59576 1610276 1132871 256 256 20716 110685 937924 1143731 512 4 5220 6875 598217 184971 512 8 13344 19309 251232 759685 512 16 16960 43353 1212715 752761 512 32 22874 36853 1267097 1195832 512 64 40858 51831 1245780 772252 512 128 23778 34643 811349 1434711 512 256 29632 160501 1523247 1078159 512 512 18485 142862 317637 1245780 1024 4 7881 15300 664053 274670 1024 8 10280 12499 261827 342015 1024 16 19823 19636 1044037 837257 1024 32 34016 63433 1350701 542992 1024 64 19400 24584 228263 240819 1024 128 41124 64711 1556257 1060013 1024 256 43395 84093 500999 915028 1024 512 31011 62595 1450607 861266 2048 4 5705 10459 227784 196643 2048 8 16386 16613 461060 660215 2048 16 14396 21471 845565 329522 2048 32 16772 34240 475059 1206823 2048 64 27113 39188 1571864 665123 2048 128 26777 54494 862979 1024953 2048 256 33922 81691 1795252 911031 2048 512 59296 74221 311864 881217 4096 4 9147 8240 293242 341562 4096 8 13308 15231 464599 311863 4096 16 18489 28044 285675 554425 4096 32 24111 41185 472327 561088 4096 64 27156 40183 350082 737624 4096 128 33396 40231 834549 479070 4096 256 29966 43291 1737831 782867 4096 512 33176 54317 1715961 1351808 8192 4 10559 8331 288146 279266 8192 8 13329 11703 212189 234257 8192 16 16651 23986 742306 396229 8192 32 22575 25785 625577 513224 8192 64 26147 38702 896376 501040 8192 128 28611 50490 1037343 585137 8192 256 29708 69468 640253 700950 8192 512 35629 65223 367468 560291 16384 4 7243 7175 240367 340617 16384 8 16712 19536 649640 628483 16384 16 21222 23792 864495 762509 16384 32 32835 55613 1131877 734835 16384 64 38681 49003 926278 897310 16384 128 60939 54018 907849 867431 16384 256 48156 40988 1263021 978327 16384 512 43045 68682 398007 1324819 32768 4 9078 9885 364250 254682 32768 8 7321 17057 706649 397139 32768 16 19042 27193 614761 286271 32768 32 19483 27328 420529 296058 32768 64 23447 30384 870214 488272 32768 128 30387 54938 1011511 1135373 32768 256 75576 101920 1152626 1368521 32768 512 30898 64724 1504715 1483712 65536 4