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 Jun 2 03:17:36 2026 Auto Mode Machine = Linux oleg142-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-oleg142-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 1875 4125 177794 474430 64 8 2882 10264 261173 627470 64 16 3448 21024 942521 481234 64 32 1367 39822 983980 1083249 64 64 2180 4904 1526887 688639 128 4 4078 3440 458548 520321 128 8 3174 15666 809997 549056 128 16 3658 23765 901083 718889 128 32 6161 17181 221499 969421 128 64 4293 67405 1133103 853794 128 128 3482 19941 1508887 1878447 256 4 2144 7385 306537 463858 256 8 8225 15429 576411 646518 256 16 10889 25731 1012194 458706 256 32 12327 36591 1202660 714967 256 64 13988 45397 1084800 481109 256 128 10846 96240 1447470 528727 256 256 8864 20747 1514860 449112 512 4 5033 3723 586454 523418 512 8 10786 9438 292222 408592 512 16 8958 8579 516122 166499 512 32 5538 23398 135695 912733 512 64 6426 20850 1261144 658978 512 128 8207 32941 1302447 1187895 512 256 16165 36023 1547395 1293037 512 512 22442 61635 1492545 581846 1024 4 4629 8345 269482 508954 1024 8 11818 10451 360442 673740 1024 16 7847 15686 339958 438002 1024 32 14483 11397 1255175 1163693 1024 64 13366 24694 919928 1163693 1024 128 24776 32617 226100 1207874 1024 256 28703 36670 1517224 267236 1024 512 14624 23612 450121 1013967 2048 4 3937 2582 100392 93911 2048 8 6336 4825 309081 726740 2048 16 8032 9632 515453 297973 2048 32 26690 26367 463674 1101583 2048 64 25811 46511 542951 1064453 2048 128 29092 46623 205045 417457 2048 256 22608 29792 1344739 415679 2048 512 42690 68139 1636862 1369829 4096 4 4385 4185 241338 256095 4096 8 8336 7214 369207 294000 4096 16 8905 11634 359585 223080 4096 32 12471 19871 176704 497753 4096 64 1441 29811 578119 722274 4096 128 23241 21893 614382 534868 4096 256 22281 36094 913686 583559 4096 512 21716 22567 1702527 1180438 8192 4 2876 2603 133163 144775 8192 8 7227 7500 389553 388299 8192 16 10538 17027 401944 297675 8192 32 19051 31293 713837 469916 8192 64 13812 17845 398735 265782 8192 128 20555 31590 665141 496730 8192 256 18372 27677 865772 647383 8192 512 35100 36909 448778 455694 16384 4 3519 4113 178459 178208 16384 8 5390 7196 187810 320375 16384 16 9802 11511 409027 463023 16384 32 18865 24573 441926 328666 16384 64 18925 44915 549097 268392 16384 128 29726 31329 388465 319337 16384 256 18769 31154 1345493 911691 16384 512 30820 38400 712408 443578 32768 4