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: Sat Sep 5 09:05:05 2026 Auto Mode Machine = Linux oleg348-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-oleg348-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 4835 13795 170240 507625 64 8 3404 19722 901377 789967 64 16 8151 32873 1204796 889431 64 32 4707 8231 666414 1087638 64 64 6575 22567 1045286 399573 128 4 3349 7327 618653 542400 128 8 5048 13260 883293 799146 128 16 6107 18259 1065630 723735 128 32 7865 27886 1254941 1291158 128 64 6246 42190 1048974 927549 128 128 7995 45421 1543594 1827299 256 4 6235 14840 597916 587127 256 8 4251 7607 1023775 785010 256 16 16926 35431 1235882 690151 256 32 14538 15437 1230218 349206 256 64 10251 65139 1173737 1347557 256 128 11997 69096 817898 1195962 256 256 14491 131815 551540 2170027 512 4 5874 5079 624485 345932 512 8 12491 23039 907717 636894 512 16 10890 26880 1187895 881269 512 32 10171 9646 1399189 1032044 512 64 15923 50869 850554 755144 512 128 23642 45250 1537424 1218910 512 256 34709 82713 899731 884172 512 512 35699 109824 2681653 2244430 1024 4 7338 6978 667977 178898 1024 8 15818 14996 394149 374818 1024 16 21423 26292 853394 470588 1024 32 35027 36393 1291406 694326 1024 64 28971 39564 1488307 549382 1024 128 50515 52059 470794 784067 1024 256 34320 77869 1113030 955115 1024 512 24570 94971 729344 737104 2048 4 5486 10978 149969 176657 2048 8 20943 15043 328527 625914 2048 16 25514 30565 795378 983189 2048 32 36138 27560 1388652 288778 2048 64 61315 23471 1437211 463348 2048 128 46984 38959 824464 748786 2048 256 22243 35204 686546 821154 2048 512 26345 26584 1204792 624005 4096 4 9560 14972 358767 121140 4096 8 17854 12266 902408 696138 4096 16 18251 31835 625910 832204 4096 32 37176 29874 773700 740549 4096 64 21763 33776 585967 430931 4096 128 24995 23410 564110 483425 4096 256 28131 50028 915292 1626141 4096 512 32195 66410 1745246 1159016 8192 4 4962 5680 126532 159616 8192 8 16640 12754 273641 248476 8192 16 12300 21862 411884 278147 8192 32 25181 24954 442998 306989 8192 64 24647 36642 921894 700164 8192 128 25926 46274 599449 522948 8192 256 29717 40550 806683 344245 8192 512 32562 39532 994527 405301 16384 4 8634 11522 365412 264398 16384 8 15029 16696 529182 309617 16384 16 18336 27554 275546 548843 16384 32 23509 33220 792495 672054 16384 64 28317 41212 957511 437025 16384 128 29122 47472 942643 745574 16384 256 50631 55043 656328 574636 16384 512 66678 100012 649130 709297 32768 4 7570 10864 420097 334350 32768 8 12030 11636 333123 248804 32768 16 19113 21562 536161 314390 32768 32 26011 28488 539363 398477 32768 64 33443 42710 1091870 975243 32768 128 36894 53335 1014453 782295 32768 256 35891 59744 1441116 786462 32768 512 42522 50600 487554 463570 65536 4