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 Mar 11 08:46:30 2026 Auto Mode Machine = Linux oleg122-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-oleg122-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 6438 18028 202469 432398 64 8 4720 17901 1421755 809014 64 16 7865 36612 1083249 874936 64 32 9440 63372 1049372 1163036 64 64 12263 56730 1734015 1163036 128 4 7498 11380 673778 699227 128 8 12522 32862 432330 859260 128 16 15621 40491 841746 1142750 128 32 16513 74505 1663139 1278855 128 64 10467 66314 990891 1172704 128 128 22558 74371 2248149 1749872 256 4 9867 15348 1032636 472222 256 8 15542 20675 493264 686620 256 16 24055 38426 620012 1163562 256 32 22717 70175 654798 600928 256 64 22124 115359 1345868 1319408 256 128 26674 86838 1407621 1274008 256 256 21243 95845 1489641 1413179 512 4 9369 15196 640885 488530 512 8 19707 24660 685482 717069 512 16 20217 39485 1055894 1120344 512 32 36710 74072 1319250 827289 512 64 37182 78963 1747618 1500891 512 128 35525 131450 1672748 853596 512 256 38369 98292 2205248 1000315 512 512 44016 113223 1376763 2381315 1024 4 11118 13989 864734 718125 1024 8 18478 22842 882683 523533 1024 16 22578 31894 1086012 734081 1024 32 46336 75029 1188159 1167489 1024 64 52528 79116 1167489 1653942 1024 128 47761 100432 1961346 902909 1024 256 54085 102307 2192645 1570483 1024 512 67801 108670 1420384 2024203 2048 4 12782 14933 434365 522444 2048 8 22119 21872 870765 941176 2048 16 33273 42901 1712231 1396100 2048 32 42532 68008 1182403 985558 2048 64 54254 89409 1040094 1137768 2048 128 44695 105605 1584038 1156456 2048 256 41191 145329 1379066 1858566 2048 512 63186 147348 1971160 1802788 4096 4 13307 15126 718347 572132 4096 8 23189 25069 759505 832325 4096 16 34016 40548 1180032 1055935 4096 32 53391 69458 1732574 1509680 4096 64 80364 89121 1231902 1357576 4096 128 84236 113186 1477608 1652894 4096 256 82348 121172 1985468 1563966 4096 512 75988 115201 1994225 2026930 8192 4 14250 14249 551354 499786 8192 8 21530 26121 975940 891700 8192 16 36508 46298 1019431 979557 8192 32 54002 66068 1197837 1133992 8192 64 73807 101787 1764679 1589124 8192 128 65876 100608 2213357 1251638 8192 256 80842 120334 1664409 1303836 8192 512 84403 111537 1486996 1114388 16384 4 14473 15268 621008 538626 16384 8 22245 25385 807411 852400 16384 16 38514 44934 1439609 663316 16384 32 53254 58735 1327609 913776 16384 64 64035 84726 1576467 1161904 16384 128 76506 116689 1709150 1267423 16384 256 82263 89781 1242806 1051274 16384 512 69727 105533 1558306 1336699 32768 4