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 Jun 11 23:26:59 2026 Auto Mode Machine = Linux oleg315-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-oleg315-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 2335 4628 704914 576282 64 8 3297 7798 939223 789967 64 16 6184 33753 789967 1119387 64 32 5466 47054 771797 1143223 64 64 2572 67297 1690338 1255511 128 4 6663 9693 731625 520321 128 8 2547 21111 942199 805138 128 16 7392 25647 889145 1076312 128 32 7455 46394 848397 160845 128 64 3721 19601 1266785 1387960 128 128 4040 25718 1642783 1749872 256 4 2012 3165 184434 468717 256 8 5555 8135 894929 744204 256 16 3188 7207 1108314 797250 256 32 6751 14785 1420658 1131677 256 64 7855 101145 1532153 1202660 256 128 14390 16687 1532153 1093639 256 256 5455 64840 448362 1855098 512 4 4363 13439 426273 32549 512 8 7754 5931 786391 869494 512 16 4340 13380 1176828 937845 512 32 10356 26123 2438090 898225 512 64 9848 25797 118738 1451192 512 128 12426 35612 202443 796306 512 256 9914 17313 533827 1707325 512 512 23117 60857 1143004 2047551 1024 4 4862 4090 479198 141608 1024 8 6391 21241 800582 127474 1024 16 14083 12279 1142945 758452 1024 32 12963 14309 359929 1003073 1024 64 14089 21299 292656 352485 1024 128 10933 21889 1484193 675011 1024 256 21645 28363 531108 237924 1024 512 10954 14202 156028 1535119 2048 4 5023 7411 153729 161998 2048 8 11029 21268 604167 989874 2048 16 24663 22102 1190598 431702 2048 32 7606 13440 610435 1120844 2048 64 18867 17548 608964 1252577 2048 128 21324 20984 202794 108652 2048 256 14099 18643 237115 931278 2048 512 13355 17905 1752044 1601164 4096 4 3192 6516 203761 288981 4096 8 17550 22212 563259 741092 4096 16 17886 12386 535702 254076 4096 32 8539 11443 143267 271259 4096 64 13959 42105 1467636 220926 4096 128 28073 39086 1622302 784977 4096 256 1162 27838 250002 169669 4096 512 14584 47815 523715 975253 8192 4 5186 10440 257724 284781 8192 8 13579 11294 482195 268044 8192 16 14681 15476 482622 359137 8192 32 16271 24005 1049703 531261 8192 64 24966 25809 343738 589818 8192 128 50891 80969 1523253 474839 8192 256 33045 33755 466300 1438982 8192 512 64271 73633 1133206 678874 16384 4 6780 7122 267393 322025 16384 8 9620 9359 288162 383359 16384 16 12431 17931 408405 328606 16384 32 24734 30139 814194 396160 16384 64 30371 27877 640551 534828 16384 128 27495 35837 594465 755858 16384 256 29215 36216 491542 473895 16384 512 37075 43007 911885 485222 32768 4 6492 8132 368988 327336 32768 8 12378 15140 234852 176114 32768 16 15025 12018 504509 388771 32768 32 19253 21703 397288 317953 32768 64 25539 47892