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: Tue Sep 22 14:17:04 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 2557 4188 615952 571375 64 8 3959 19295 842003 725882 64 16 3237 21739 1105556 942521 64 32 4563 50270 1255511 727850 64 64 2034 40556 1002351 1070292 128 4 5475 15033 193969 226164 128 8 5536 11552 399812 422464 128 16 5744 43331 1152564 776042 128 32 5249 39349 158051 1152564 128 64 5105 41077 1377278 907174 128 128 12469 96754 1487977 1939522 256 4 2065 4273 528987 610842 256 8 4268 9695 917096 812944 256 16 13370 28375 390337 1032636 256 32 11352 21064 1339154 534517 256 64 10191 16652 1340826 1195962 256 128 18986 100870 91955 1514860 256 256 6163 51106 1168627 1855098 512 4 4719 4079 245797 185306 512 8 8173 6562 223467 712076 512 16 6635 13506 1062161 906185 512 32 13142 38423 728255 802555 512 64 11076 48641 1399189 778128 512 128 19704 25543 1329871 1313601 512 256 9807 42691 1662389 771143 512 512 11869 44607 1829505 585814 1024 4 9302 10216 639626 367694 1024 8 7468 7754 869989 629409 1024 16 22136 33663 1192117 803127 1024 32 28572 47056 1278718 530583 1024 64 9880 50887 94004 375933 1024 128 11341 30757 224963 1130312 1024 256 24951 93448 574285 259690 1024 512 13783 70557 161922 932714 2048 4 4600 5677 423153 242196 2048 8 6968 20158 925858 825811 2048 16 11022 11626 519914 437128 2048 32 10367 13590 255426 341333 2048 64 12766 36924 1442279 518221 2048 128 17913 42191 1575323 359730 2048 256 25607 27428 377450 1508115 2048 512 30169 70191 1662201 1128353 4096 4 4673 4748 183053 244916 4096 8 9508 5071 270167 174549 4096 16 7218 12912 780307 780661 4096 32 21320 30239 660007 650166 4096 64 33810 58573 1394605 365841 4096 128 23728 39148 816774 278673 4096 256 61958 27420 1686316 758667 4096 512 20280 60272 563093 1547902 8192 4 2254 4100 151219 142278 8192 8 10443 7223 253230 177885 8192 16 10021 13224 312469 245497 8192 32 23364 28307 480920 382591 8192 64 16865 21206 402419 367190 8192 128 24259 30398 618083 514253 8192 256 28686 40125 649549 382179 8192 512 31334 57673 1039572 327445 16384 4 5011 5432 324667 249675 16384 8 8670 9609 525463 548567 16384 16 12985 12903 259836 572029 16384 32 17395 29919 817857 756132 16384 64 19493 26404 886350 764536 16384 128 21633 30910 966902 825391 16384 256 38437 33331 824896 1173311 16384 512 30012 32506 436730 387200 32768 4 5010 5579 261622 251896 32768 8 8998 10443 450159 257143 32768 16