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 Sep 2 10:25:31 2026 Auto Mode Machine = Linux oleg332-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-oleg332-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 2552 3409 118315 28445 64 8 2573 15900 821391 727850 64 16 6299 34633 1083249 801764 64 32 6260 40790 1255511 1188789 64 64 6071 34575 939223 1679761 128 4 4409 7168 669577 348888 128 8 6967 21411 901083 761728 128 16 5255 23034 1217930 940549 128 32 6510 18181 450846 333500 128 64 5470 75692 1579934 1359835 128 128 6492 68593 1539168 2035099 256 4 8157 10408 644578 95991 256 8 10460 11240 980760 550409 256 16 7542 33661 1180188 934659 256 32 6196 16553 350117 1128110 256 64 15774 46300 1398455 490336 256 128 11392 70758 725596 1729594 256 256 17550 79952 1334162 2030503 512 4 7373 9109 689001 293741 512 8 6479 16954 652967 277208 512 16 14306 24435 1051242 948197 512 32 8661 30731 1299295 1160923 512 64 12742 44614 135089 773364 512 128 8096 26193 1086890 1205228 512 256 16829 41578 1695195 1476130 512 512 15962 75749 1523247 2047551 1024 4 6913 6003 390529 127983 1024 8 7694 9586 636781 832550 1024 16 7247 26313 815788 433362 1024 32 19740 43068 1074331 1151834 1024 64 11256 26862 1460472 968686 1024 128 22557 55609 1582636 1343938 1024 256 28706 68280 1185209 1126458 1024 512 18849 45527 1464956 721139 2048 4 5820 4264 223261 302869 2048 8 10654 8503 249360 604507 2048 16 12527 14075 782268 862373 2048 32 17205 27946 266075 294419 2048 64 35395 49231 807263 563281 2048 128 24332 40775 538526 260531 2048 256 34981 56220 990787 1447382 2048 512 35959 67992 745278 1611376 4096 4 9926 5346 185096 426312 4096 8 16202 14206 612520 485364 4096 16 17837 16787 556382 480195 4096 32 25400 19629 489708 792729 4096 64 27199 29285 1456685 1364802 4096 128 25950 72340 1656241 604843 4096 256 29000 62649 832164 779174 4096 512 36386 53487 950802 1060302 8192 4 5841 6267 292142 148030 8192 8 8200 11884 636718 274946 8192 16 13817 12986 215267 506961 8192 32 17693 15905 560281 1042505 8192 64 25000 43140 1511460 303529 8192 128 23307 28213 646165 652547 8192 256 29858 36080 687940 768265 8192 512 35338 34384 474957 369889 16384 4 5675 5561 154873 328369 16384 8 8777 8862 454644 350025 16384 16 16738 16812 536913 437442 16384 32 18724 30143 548348 489689 16384 64 25685 30180 689360 688490 16384 128 25611 37130 624366 547300 16384 256 28418 42644 746392 467912 16384 512 29400 36190 723067 906543 32768 4 5574 6567 316966 282188 32768 8 10232 10394 377142 374072 32768 16 15513 18330 559573 580097 32768 32 22781 21931 568395 437103 32768 64 20985 38531 964052 890992 32768 128 34066 34348 495038 883881 32768 256