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: Thu Jul 16 14:11:29 2026 Auto Mode Machine = Linux oleg346-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-oleg346-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 5287 13252 645579 481234 64 8 6304 22685 799377 423529 64 16 8488 44755 653436 552557 64 32 6930 54551 1204796 1163036 64 64 8667 77008 1828508 2467108 128 4 5705 15881 581781 637004 128 8 7877 25863 753179 761728 128 16 13537 37174 1007629 960747 128 32 12620 71185 1346196 976473 128 64 12115 88274 1421023 1436229 128 128 9311 97722 1278855 1778862 256 4 11401 14505 686620 582983 256 8 11600 17268 1103757 1076103 256 16 19724 46085 422432 794889 256 32 28991 63731 1274008 1062263 256 64 19592 78336 1361224 1048775 256 128 31379 114595 1479379 1497953 256 256 15077 116523 1415041 2371308 512 4 12280 15012 559560 531712 512 8 17379 27308 819085 700234 512 16 27332 46916 1329871 814117 512 32 27771 65148 925717 884172 512 64 33833 97005 1350783 1261144 512 128 39794 119180 1510391 1462061 512 256 33186 119292 2032051 1589779 512 512 27254 106803 1718254 1961520 1024 4 10287 15891 670166 500007 1024 8 19836 28879 845498 889631 1024 16 29148 49175 1136593 557440 1024 32 47621 69788 1331440 1452570 1024 64 51421 98177 1365299 1141730 1024 128 62771 112205 1625769 1381993 1024 256 58792 110108 1818510 1414304 1024 512 59667 121026 1612948 1762539 2048 4 14033 16151 616525 613531 2048 8 24435 30083 826447 893499 2048 16 35284 48089 1224194 1391126 2048 32 49708 71339 1274507 1098765 2048 64 55919 101652 1402711 1280015 2048 128 69248 91645 1689998 1363523 2048 256 69205 117155 1825390 1477760 2048 512 71493 131899 1735408 1523630 4096 4 14901 15687 695997 708658 4096 8 26271 29308 954129 849991 4096 16 37986 49110 1146715 1092810 4096 32 51555 69674 1005681 778574 4096 64 70397 98608 1518621 1121562 4096 128 61865 101373 1620160 985547 4096 256 56866 97347 1931884 1616349 4096 512 76326 129153 1822062 1428702 8192 4 14715 16698 706208 623726 8192 8 25891 27687 952880 863769 8192 16 39942 42689 1077350 942917 8192 32 52430 66511 1309051 1201523 8192 64 61640 83619 1496256 1170816 8192 128 79537 103715 1225391 1208794 8192 256 81374 94976 1652561 1196419 8192 512 79763 110414 1763955 1622211 16384 4 15209 16757 707639 623578 16384 8 24149 25708 941610 868538 16384 16 40364 38835 1100183 956778 16384 32 39923 58003