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: Mon Jun 1 11:23:45 2026 Auto Mode Machine = Linux oleg334-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-oleg334-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 5658 7162 647135 418250 64 8 5595 28355 789967 831569 64 16 8394 28047 913649 983980 64 32 5278 53422 1232453 1049372 64 64 7953 68815 1285575 1562436 128 4 4749 13879 436904 334956 128 8 6715 20739 809997 1105114 128 16 5476 42327 1229084 794416 128 32 7807 45684 1349580 1121270 128 64 9800 75745 643108 1406136 128 128 8744 92614 2558895 1778862 256 4 8221 10930 372076 186874 256 8 7257 17613 197241 286728 256 16 10157 47777 1003679 1007446 256 32 14650 49155 1248819 844929 256 64 12106 43948 1213534 958864 256 128 10693 77270 1497953 1487577 256 256 23749 113830 1855098 1325925 512 4 7520 11211 619084 415872 512 8 13795 29650 688118 779258 512 16 22634 50578 1176828 844865 512 32 24295 61076 1326585 1132755 512 64 34543 86764 1442420 1309596 512 128 37835 130246 1143004 616772 512 256 22957 80860 820337 1783912 512 512 36728 122337 1785395 1066910 1024 4 9302 14961 653146 554704 1024 8 16370 23523 664875 618799 1024 16 30290 44233 902909 808874 1024 32 28992 35991 1188159 390671 1024 64 46600 84866 914444 914249 1024 128 28675 71080 1376236 1159609 1024 256 43289 126826 1777861 1242826 1024 512 47892 113336 1436537 1625769 2048 4 11290 12304 490662 516135 2048 8 17020 22668 773742 473854 2048 16 24511 42621 739376 996650 2048 32 44619 69268 1767183 1098624 2048 64 40193 79278 1307885 736460 2048 128 59907 106454 786782 1478778 2048 256 44112 98042 1561009 1594920 2048 512 60990 124544 1325646 1562145 4096 4 14583 16614 478964 499635 4096 8 24594 22728 688632 414034 4096 16 31073 42614 1331586 934307 4096 32 51608 57875 1343352 800001 4096 64 54192 95134 1257971 1187208 4096 128 70824 116888 1480792 1471785 4096 256 80449 112889 928801 1259169 4096 512 74699 103927 1183446 1350426 8192 4 13698 14652 494151 526273 8192 8 23322 28488 868727 944966 8192 16 35245 44836 819693 542955 8192 32 43010 58708 1147665 893742 8192 64 48130 67812 1831854 1209347 8192 128 53866 72103 1746648 1170298 8192 256 50076 71242 1794541 1257409 8192 512 66957 93433 1702341 1299939 16384 4 10713 11615 282532 340799 16384 8 16828 19523 570651 766788 16384 16 29521 38126 829526 892567 16384 32