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 Aug 25 21:36:50 2026 Auto Mode Machine = Linux oleg258-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-oleg258-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 1887 7230 420873 457452 64 8 2971 9052 598110 821391 64 16 1737 32688 877797 842003 64 32 2634 26633 831569 743988 64 64 4253 51455 244297 1330167 128 4 3465 2633 621518 381082 128 8 5403 15254 349797 373136 128 16 7361 42187 490380 568836 128 32 11196 17548 901083 329812 128 64 4333 37657 1085013 1024942 128 128 5395 76599 859260 1802755 256 4 3927 3477 280072 117595 256 8 5787 13641 660030 262284 256 16 10218 16748 850956 127798 256 32 10842 33759 233127 775933 256 64 9409 49070 462858 962301 256 128 6201 28513 462260 760006 256 256 7467 51231 1190657 1312954 512 4 6854 8109 133129 209310 512 8 11464 15426 403146 377293 512 16 12733 29243 745186 713970 512 32 12615 21525 784094 590486 512 64 16934 29225 479905 524697 512 128 7240 13495 62737 629796 512 256 21033 56109 498047 1258188 512 512 19660 67482 1446306 542320 1024 4 4428 4450 112886 496137 1024 8 8670 14496 387744 214771 1024 16 16415 31504 208434 384378 1024 32 17529 35570 543542 849848 1024 64 22641 33840 752472 193905 1024 128 26135 36928 473650 1051192 1024 256 26883 65891 961529 612446 1024 512 29899 79133 1568189 1075676 2048 4 5887 5523 162550 120767 2048 8 7227 7554 797816 68089 2048 16 12883 19606 1292923 1079028 2048 32 17589 17030 286275 922081 2048 64 15580 29875 609526 908237 2048 128 21007 51184 502811 633859 2048 256 31619 27640 423132 514065 2048 512 25808 42658 1498120 1503891 4096 4 4065 5962 140457 107391 4096 8 7831 6646 534169 369675 4096 16 16122 10356 566453 314132 4096 32 11417 9845 241967 500669 4096 64 14749 23087 380778 267171 4096 128 23982 30615 447068 276809 4096 256 39289 34432 232739 209309 4096 512 40863 60229 447849 388396 8192 4 6648 5647 304672 254654 8192 8 10496 8335 520327 293495 8192 16 8290 15311 415882 369194 8192 32 17097 29221 639503 438923 8192 64 29033 36662 194514 379435 8192 128 27941 19478 533471 663317 8192 256 24763 24615 315949 377335 8192 512 31643 27410 462428 482162 16384 4 3875 5077 195795 197962 16384 8 8556 15362 497405 316397 16384 16 15327 16413 987408 474953 16384 32 26750 30524 1117756 730189 16384 64 18345 31101 356484 434150 16384 128 23857 27764 1081093 782122 16384 256 22542 32879 857708 669559 16384 512 32251 41934 535737 447821 32768 4 5276 6488 197458 263548 32768 8 11372 10423 601115 735039 32768 16