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 Jul 15 01:30:36 2026 Auto Mode Machine = Linux oleg432-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-oleg432-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 6273 16671 507625 552557 64 8 8566 27164 863676 939223 64 16 12733 41241 942521 560635 64 32 12799 40840 1638743 1168097 64 64 11832 76919 1255511 1392258 128 4 10996 15882 447464 568836 128 8 14956 29768 841746 680612 128 16 17144 50472 1040839 809997 128 32 14142 78814 267658 1067750 128 64 19796 85505 1196221 940549 128 128 14765 115834 1319723 1858934 256 4 8679 17756 554101 512084 256 8 17324 26781 679237 757326 256 16 18353 52980 833776 1137672 256 32 27078 66738 1673001 783292 256 64 28789 102732 1384034 1354356 256 128 19259 121028 1058076 699594 256 256 39120 119746 2533571 2205688 512 4 11649 18566 441069 498509 512 8 16610 30245 762924 664895 512 16 33197 50996 955368 285425 512 32 36081 81657 1355045 861818 512 64 39862 96421 1429934 1383861 512 128 40970 139430 1309596 1329871 512 256 57476 117350 1983258 1060063 512 512 48822 100590 1454140 2187279 1024 4 12766 18286 483242 521879 1024 8 20408 31235 573978 531108 1024 16 37444 50381 525390 1045817 1024 32 45253 70639 1874871 891292 1024 64 46088 106742 1544504 1292961 1024 128 51077 120968 1605111 1475525 1024 256 54733 157516 1517224 1519371 1024 512 60316 157268 1442326 1448162 2048 4 15813 17672 707409 352859 2048 8 26332 29099 1034831 550714 2048 16 36849 52848 1106978 991817 2048 32 58073 67384 1119675 1296240 2048 64 57291 99916 1688337 1203273 2048 128 76472 75252 1511299 1285763 2048 256 63390 124915 924165 1025075 2048 512 82015 128369 1122749 1051295 4096 4 15379 16467 507937 657985 4096 8 26513 29507 816929 671487 4096 16 39666 52819 1023719 777798 4096 32 52229 68857 1631856 988439 4096 64 50606 82085 1598156 758365 4096 128 82869 111065 1889391 1269685 4096 256 70055 114505 589607 1407516 4096 512 88938 90915 1330246 1738535 8192 4 15840 16905 665308 680056 8192 8 25129 31460 605385 779224 8192 16 41567 52150 1460264 828888 8192 32 57874 80075 1301317 1241956 8192 64 58063 84587 1248591 1284629 8192 128 86227 131431 1455069 1451198 8192 256 69175 118712 1234859 1544757 8192 512 102952 131647 1691864 1175986 16384 4