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 Feb 18 13:37:38 2026 Auto Mode Machine = Linux oleg410-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-oleg410-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 4235 14496 161629 114285 64 8 8217 33597 167478 289635 64 16 11038 44942 780776 598110 64 32 13995 58180 598110 473593 64 64 14125 75364 710511 1421755 128 4 8126 17313 141103 129967 128 8 16922 31466 316961 292922 128 16 22654 45260 415597 458548 128 32 21917 69079 800337 819893 128 64 20411 79893 826202 711270 128 128 25102 101109 1939522 1440082 256 4 12908 17757 152481 159882 256 8 15274 32145 304020 319965 256 16 28467 47548 542347 378637 256 32 29861 83691 705107 684432 256 64 33006 110822 799625 894929 256 128 47119 117814 1347557 1080434 256 256 48559 164613 1642294 2588541 512 4 16140 17047 188098 191264 512 8 23880 28176 249278 287488 512 16 36363 46634 616065 575300 512 32 33042 81502 736750 514637 512 64 55059 104232 1379416 828247 512 128 59576 108525 1303238 1322500 512 256 52165 162801 1689859 1411141 512 512 48347 148401 1712772 1961520 1024 4 16711 18310 170125 171958 1024 8 27657 39931 239918 225649 1024 16 39428 48815 656340 732453 1024 32 49006 86573 718005 638390 1024 64 65741 107903 972414 874417 1024 128 74326 119710 1256644 1161176 1024 256 92712 157585 1499217 1673273 1024 512 89276 149116 2035716 1477555 2048 4 17977 19673 142034 183100 2048 8 27692 37078 355193 243314 2048 16 47843 56431 549938 516911 2048 32 58723 84415 890812 805371 2048 64 70587 114247 1255690 835612 2048 128 81776 120954 1414491 1067761 2048 256 78452 150521 1531781 1449336 2048 512 83759 153053 2183619 1897990 4096 4 14970 19352 164490 187083 4096 8 27017 34512 344632 379298 4096 16 47957 57217 587410 456234 4096 32 69829 77288 707899 654426 4096 64 85085 103288 1121854 830996 4096 128 90858 129044 1546230 1254572 4096 256 97428 158611 1465508 1417269 4096 512 101316 168511 2263247 1737831 8192 4 16484 19768 178389 169040 8192 8 28427 33468 343941 288521 8192 16 49591 55373 657995 501464 8192 32 60836 77297 788903 782649 8192 64 82243 106812 1210199 880301 8192 128 90869 111758 960149 1157875 8192 256 95558 120396 1554752 1403193 8192 512 76051 113484 1639002 1423718 16384 4 16523 18239 178329 158470 16384 8 27202 32656 341183 338723 16384 16 44631 47427 420382 399981 16384 32 58780 67659 733463 665636 16384 64 79440 94215 1126737 954280 16384 128 84414 112605 1556824 1169776 16384 256 96447 122672 1575527 1450304 16384 512 107918 134409 1092627 1631214 32768 4 16503 17553 176162 171078 32768 8 28694 31835 300772 302793 32768 16 45541 54016 607873 469832 32768 32 61550 78402 863430 697221 32768 64 74917 95787 1060798 1071759 32768 128 89730 115535 1385015 1244559 32768 256 91051 133688 1777975 1553723 32768 512 95087 140930 1898254 1610698 65536 4