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 Jun 2 02:20:27 2026 Auto Mode Machine = Linux oleg216-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-oleg216-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 2533 8175 463774 633392 64 8 2018 24474 811459 771797 64 16 4052 10720 1066042 1083249 64 32 3512 37824 1304314 1017549 64 64 5118 13748 1879725 1879725 128 4 3782 6716 821147 563463 128 8 6641 6954 795593 747933 128 16 6889 14916 921183 650117 128 32 8525 37858 1206978 1111981 128 64 8911 78286 1421023 1440082 128 128 8539 94739 1642783 715059 256 4 5732 9497 516270 312970 256 8 4436 4701 711178 192192 256 16 6348 11456 354042 924200 256 32 24960 84018 1455317 1570244 256 64 15274 58223 1219045 768712 256 128 15692 21064 1639786 1632308 256 256 18509 77977 1729594 1802167 512 4 7154 21190 414187 600895 512 8 4382 8354 193854 451930 512 16 10261 13619 1176828 1002183 512 32 18658 39686 929322 859060 512 64 8381 10311 1299295 682649 512 128 13379 107628 1009722 1433753 512 256 20630 64524 731480 1080328 512 512 28197 90478 1533034 1677976 1024 4 7181 18968 255747 190263 1024 8 16476 14840 550227 520614 1024 16 16130 15176 335182 948995 1024 32 12342 40829 760197 455757 1024 64 11218 39369 1437980 128450 1024 128 32003 27675 1158358 1243906 1024 256 23704 37094 258331 661904 1024 512 43768 91781 1080004 1189476 2048 4 8987 9277 489711 375913 2048 8 5543 11244 184670 819196 2048 16 17011 18224 285201 990330 2048 32 15624 16415 715064 650368 2048 64 14590 23125 329573 235103 2048 128 38762 71937 857552 1002933 2048 256 25602 92686 1067230 771379 2048 512 54802 60159 1725300 795968 4096 4 5859 5189 321528 340257 4096 8 14774 9872 610887 358512 4096 16 19741 23245 260112 347293 4096 32 31409 21854 251396 285257 4096 64 34984 58738 744303 1614375 4096 128 29954 33481 591129 721879 4096 256 39110 42890 772552 982503 4096 512 24243 55539 635825 607624 8192 4 6540 5604 336649 419114 8192 8 22738 12454 408680 676016 8192 16 21577 28258 3439 683805 8192 32 28593 29467 736625 512603 8192 64 29652 26038 721376 836780 8192 128 39412 53092 1199049 915020 8192 256 40162 52767 911427 501347 8192 512 35550 74187 554378 982133 16384 4 5258 6103 198656 234100 16384 8 8977 9202 280985 463529 16384 16 15291 17297 294803 376677 16384 32 24920 22666 415319 335305 16384 64 27326 30171 753975 608439 16384 128 27939 56924 1296402 717525 16384 256 46073 44970 564696 420349 16384 512 33831 31828 1189663 1278696 32768 4 4580 5456 362906 366725 32768 8 9311 14355 544571 292299 32768 16 11933 13718 493435 303292 32768 32 13373 23521 812479 720904 32768 64 19525 17812 391204 325560 32768 128