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 Aug 22 19:21:28 2026 Auto Mode Machine = Linux oleg647-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-oleg647-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 2409 5665 659861 481234 64 8 2847 14121 831569 877797 64 16 3715 9265 492717 1255511 64 32 3513 29655 1363961 407457 64 64 1713 11093 842003 1947927 128 4 1703 3185 652488 518312 128 8 5335 8814 826202 766076 128 16 2638 47214 1048974 277193 128 32 2202 39886 1406136 1082825 128 64 3792 14408 1424795 1598754 128 128 9097 65338 278922 1802755 256 4 5523 8509 508929 432471 256 8 7429 15063 512084 641497 256 16 9852 27073 995306 225965 256 32 4761 11335 1340826 518263 256 64 6321 41755 1534342 1369908 256 128 11387 71350 408297 894929 256 256 8664 57361 1763685 1911233 512 4 2730 4443 329681 565751 512 8 8618 18150 937845 721163 512 16 10286 14715 1118011 881269 512 32 10389 26572 1387437 112205 512 64 6706 10307 340178 593259 512 128 5811 43144 467168 1361920 512 256 7071 32742 1729323 1066380 512 512 17987 65221 1674052 2107844 1024 4 4994 4555 353937 126875 1024 8 8059 14301 541554 204018 1024 16 13941 13132 194935 905384 1024 32 19874 43197 158463 528689 1024 64 16657 44136 432054 653942 1024 128 12819 33907 777396 694214 1024 256 38408 77160 428092 907105 1024 512 30187 33275 484387 158809 2048 4 9461 5446 359234 206514 2048 8 7704 7361 203154 149554 2048 16 18020 19850 647280 474167 2048 32 10272 24965 1335955 367424 2048 64 40878 59006 646841 1313685 2048 128 27318 44779 1665101 1444219 2048 256 23346 28999 345535 829800 2048 512 34579 71943 1841434 437685 4096 4 5430 5830 228520 146280 4096 8 9425 6972 322694 293262 4096 16 15951 16507 360657 589688 4096 32 20152 25724 326583 423443 4096 64 31560 50409 1514204 663422 4096 128 23582 24057 312390 359676 4096 256 32189 31347 883292 534435 4096 512 30009 37792 338094 611626 8192 4 2325 7677 367088 336983 8192 8 10337 12290 422463 336399 8192 16 13893 13938 406793 428410 8192 32 17534 23516 716577 485713 8192 64 26910 33952 751692 683289 8192 128 33924 47096 439743 721967 8192 256 33055 57562 427403 494300 8192 512 29301 45717 396092 482080 16384 4 5757 7065 203028 222581 16384 8 12199 12050 382240 382642 16384 16 17113 21116 486720 638029 16384 32 23347 28288 354723 588952 16384 64 22694 38005 714712 686928 16384 128 27675 35075 727823 808761 16384 256 32848 31485 579824 415648 16384 512 27444 43871 872464 865464 32768 4 6508 6712 261130 307752 32768 8 9649 14028 362414 236250 32768 16 14751 21302 422040 428721 32768 32 21313 35511 747699 547265 32768 64 27651 34871 710341 507306 32768 128 27165 41445 673849 651101 32768 256