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 Jul 28 02:35:50 2026 Auto Mode Machine = Linux oleg110-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-oleg110-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 2965 8285 639427 227718 64 8 1328 3608 688639 889431 64 16 2506 18884 520419 710511 64 32 1965 45848 2006158 969761 64 64 4607 51614 1183548 1638743 128 4 2942 4387 1231904 688467 128 8 5931 12427 254947 340480 128 16 5177 29379 1346196 927549 128 32 6702 59199 1102844 727658 128 64 10198 65473 1319723 1561553 128 128 7439 18577 1521718 1939522 256 4 3829 7094 603970 609455 256 8 6203 12937 886067 557844 256 16 9199 32544 1019886 656399 256 32 9359 39512 1003679 934659 256 64 6237 36066 1004618 714967 256 128 12112 57487 1368162 1430119 256 256 9089 59939 1704877 1471270 512 4 5000 4708 544796 74612 512 8 7558 22269 765371 407275 512 16 9552 12186 216027 161515 512 32 14901 40203 1132755 513039 512 64 12491 37320 1047141 695697 512 128 16274 53355 189559 1308798 512 256 6856 46963 1350783 1541840 512 512 16753 43529 522908 1062161 1024 4 5574 6341 273498 213650 1024 8 5216 8447 593653 270979 1024 16 10935 13217 1071116 856970 1024 32 38724 18465 1183902 1097669 1024 64 18487 34808 1193442 500007 1024 128 19622 24250 402195 399539 1024 256 34985 73106 1436056 1999700 1024 512 37565 89159 1768345 1796451 2048 4 5908 5823 262225 285040 2048 8 14709 16182 1143524 496849 2048 16 25445 34539 653485 290202 2048 32 33040 42197 333981 853717 2048 64 26372 52607 668851 633485 2048 128 45228 77602 1016944 984541 2048 256 45555 81616 515608 485422 2048 512 45263 82653 917943 1183218 4096 4 4683 6714 334858 250199 4096 8 17648 13042 424710 283712 4096 16 21865 12152 459812 182702 4096 32 35134 35355 822010 1190004 4096 64 33679 46295 647690 433213 4096 128 20160 28116 305828 465834 4096 256 37245 57580 1511939 398449 4096 512 48802 44989 973595 538455 8192 4 7069 6445 241473 169294 8192 8 10832 13125 354126 178242 8192 16 20041 27394 740418 542620 8192 32 28172 25033 1160495 890153 8192 64 4062 48072 712402 829909 8192 128 24602 32908 415415 507433 8192 256 42890 58568 719412 670044 8192 512 50742 69843 547890 977105 16384 4 7595 7393 421605 262450 16384 8 10542 11950 440419 235666 16384 16 21458 21140 759433 471453 16384 32 26021 32444 714742 275259 16384 64 22881 30024 667861 930316 16384 128 39937 35862 661445 920607 16384 256 51392 63634 1403704 643797 16384 512 40239 50536 1777589 793685 32768 4 7013 7391 367087 584558 32768 8 12720 13160 520415 454303 32768 16 13496 19708 769290 446150 32768 32 21948 33134 982459 648013 32768 64 27916 47528 1078927 909235 32768 128 35439 41734 1119047 711341 32768 256 35499 47184 742179 620405 32768 512 46012 57212 1046836 899747 65536 4