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 Aug 3 16:09:29 2026 Auto Mode Machine = Linux oleg626-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-oleg626-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 7495 16016 492717 532815 64 8 10394 31667 735831 688639 64 16 8435 45684 1638743 763021 64 32 10189 65379 1143223 1363961 64 64 9660 88891 1083249 1828508 128 4 11143 14741 640042 227410 128 8 16359 24767 1579934 595328 128 16 17807 47583 1185654 914904 128 32 24643 75151 1802755 1123617 128 64 23438 101261 2326073 1155043 128 128 21358 126745 1561553 1939522 256 4 13768 18940 567575 592636 256 8 19030 23029 838988 507966 256 16 28712 38811 1231629 1016025 256 32 25048 74483 1319408 1168627 256 64 38682 126043 1715775 1102624 256 128 38352 140490 2557711 740100 256 256 33555 158513 1632308 1842366 512 4 14057 17237 553502 560729 512 8 25947 31918 909640 844865 512 16 35965 60535 997991 1132755 512 32 40815 80112 901241 814117 512 64 35319 79304 1700565 1248678 512 128 43768 152511 1635797 1467055 512 256 43544 123313 1700565 1488408 512 512 69236 181762 2081286 2256220 1024 4 12203 15271 446982 621305 1024 8 24397 30680 909602 778665 1024 16 31846 45985 1201790 1546729 1024 32 48590 82380 1180972 1102176 1024 64 46871 97405 1604512 1238168 1024 128 61449 120371 1681790 1638796 1024 256 54656 154407 2305644 1004951 1024 512 70200 156980 1265531 1150600 2048 4 15251 17027 537112 564948 2048 8 24237 34055 827163 970525 2048 16 36587 45273 985106 682238 2048 32 45577 84810 1225591 1552826 2048 64 60532 86710 1027528 1868674 2048 128 84211 94937 1715309 810462 2048 256 60366 125075 1105837 1771556 2048 512 89089 137949 2345819 1535341 4096 4 15988 17707 700881 614646 4096 8 27692 31735 1119734 747835 4096 16 40004 41347 522124 728676 4096 32 58709 71658 1118859 644846 4096 64 59531 82148 1196219 1315778 4096 128 71446 112647 1632476 1338954 4096 256 73502 116645 1711516 1536962 4096 512 78710 108716 1850121 1389866 8192 4 15189 16248 452871 594317 8192 8 26712 29549 968321 845074 8192 16 37732 53781 1056481 974666 8192 32 50840 66809 1333333 1371273 8192 64 67293 108038 1642999 1192433 8192 128 76968 117427 935498 1161790 8192 256 76833 126574 920042 1231672 8192 512