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 23:33:47 2026 Auto Mode Machine = Linux oleg327-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-oleg327-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 4074 3762 353760 533875 64 8 5230 7192 608965 143793 64 16 3584 27586 987600 627470 64 32 3393 37942 207798 926260 64 64 3157 16024 2278628 1648808 128 4 1729 4401 637004 587511 128 8 6276 13264 382167 637004 128 16 7940 15808 907174 780556 128 32 4919 20695 1082825 789741 128 64 7578 45946 1175271 1243315 128 128 8668 55098 1440082 1579934 256 4 8058 6957 585845 450620 256 8 4492 6447 913973 817898 256 16 17943 14971 1128110 855703 256 32 7713 14077 1128110 1262029 256 64 9037 67561 1254656 510866 256 128 17971 71071 1437779 1368162 256 256 8033 29160 372593 1868008 512 4 4330 6883 489086 358822 512 8 7147 12583 696600 235294 512 16 10047 24844 836636 710192 512 32 14018 25494 1168504 1030064 512 64 27051 73807 1442420 1391032 512 128 16900 72408 953248 219943 512 256 32896 69216 1080328 411253 512 512 25802 87703 1182010 2073249 1024 4 4205 5598 271407 538094 1024 8 6685 8284 211005 541486 1024 16 14769 37933 313826 461883 1024 32 28323 79669 1286378 1115342 1024 64 41693 77160 1408275 815323 1024 128 31291 78401 1622698 1150292 1024 256 17497 45279 1659694 1475525 1024 512 16349 55703 493969 1155864 2048 4 6034 6140 271114 303308 2048 8 11764 14183 315901 208125 2048 16 18793 13044 740396 748851 2048 32 26123 28276 290821 351157 2048 64 29110 35028 396364 604294 2048 128 38193 47026 991702 1203947 2048 256 34538 64801 718353 691910 2048 512 25717 65599 438467 406358 4096 4 5709 7211 325235 244581 4096 8 10031 12705 574715 398015 4096 16 23092 39642 603781 449020 4096 32 25220 40545 561547 550834 4096 64 35690 32541 785875 576084 4096 128 69214 116241 640303 789668 4096 256 43287 61440 708892 1066687 4096 512 52931 97920 1052378 703435 8192 4 9742 8031 493640 343193 8192 8 17885 15598 486283 582064 8192 16 22425 30402 940543 887440 8192 32 30326 42848 821339 569163 8192 64 31601 57815 700592 1066515 8192 128 34648 54374 754896 673683 8192 256 31070 64096 703303 786789 8192 512 72624 74635 1331627 522249 16384 4 8827 9867 497978 492264 16384 8 11880 13332 859823 379741 16384 16 20153 26896 811972 544969 16384 32 29577 51864 668140 843103 16384 64 32658 39214 416313 319047 16384 128 60454 45338 624082 566960 16384 256 42756 83839 1572067 944042 16384 512 47379 60703 1382746 759433 32768 4 8837 7829 295230 272796 32768 8 11025 14708 341312 555493 32768 16 17209 19486 373492 448421 32768 32 18442 17110 438379 355012 32768 64 16867 31255 859762 468950 32768 128 22201 35240 563090 374290 32768 256