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: Sat Aug 22 04:41:13 2026 Auto Mode Machine = Linux oleg411-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-oleg411-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 1305 6323 627470 172982 64 8 3159 14856 831569 581273 64 16 4072 15321 1188789 874936 64 32 5289 59974 1392258 1049372 64 64 2168 36955 1210227 206997 128 4 4801 6493 364522 318465 128 8 4472 9554 795593 24549 128 16 7124 27526 889145 393656 128 32 7302 26671 325809 1114289 128 64 5933 37949 284388 1291158 128 128 9355 26981 1220700 1997245 256 4 3303 5826 572721 352647 256 8 6491 13353 831194 789628 256 16 9536 20285 544547 955451 256 32 6489 62976 1158540 1062263 256 64 8620 55459 815414 691930 256 128 15550 44045 1430119 1354356 256 256 8999 70758 1755037 1354356 512 4 6056 3682 83906 589837 512 8 11863 19346 695697 628138 512 16 13137 18508 879825 773364 512 32 15302 16912 890404 1062161 512 64 12580 21597 1438555 750919 512 128 17624 46142 387017 619084 512 256 14748 54220 1619757 422084 512 512 26524 65640 1640796 1938502 1024 4 4854 5475 220686 601299 1024 8 11727 18726 363124 537219 1024 16 20238 15267 644811 965203 1024 32 15739 23760 247994 913471 1024 64 20120 39136 1460472 1174192 1024 128 21027 68249 416267 772225 1024 256 25779 103401 1155864 879790 1024 512 21555 54914 707712 1530742 2048 4 5966 5646 319449 195248 2048 8 9142 8618 466722 413996 2048 16 11045 14499 893592 556674 2048 32 21367 16761 1448358 1174964 2048 64 11612 49327 911031 1263447 2048 128 41322 71560 753185 879773 2048 256 39744 35734 1194738 587313 2048 512 40940 67760 719376 1071223 4096 4 5288 9515 171869 311721 4096 8 9716 10239 475070 352980 4096 16 15953 19422 366630 329338 4096 32 20808 20327 612433 441712 4096 64 21284 30266 396518 348237 4096 128 25227 33136 494871 532365 4096 256 38805 32034 1034881 827315 4096 512 35551 35666 495642 533605 8192 4 5324 9638 314494 162646 8192 8 7650 8734 201560 294761 8192 16 10694 17211 393092 321609 8192 32 16038 33227 546096 614556 8192 64 20517 39842 832180 543952 8192 128 29291 37949 760073 526410 8192 256 24753 35367 825304 648054 8192 512 32500 41156 574233 694054 16384 4 5597 5846 206759 163871 16384 8 9048 10578 318600 345588 16384 16 16701 14815 405315 195387 16384 32 20689 19972 606950 831634 16384 64 23881 31184 605085 903789 16384 128 34968 50993 483429 500962 16384 256 33560 37032 598894 782167 16384 512 36271 55497 649204 673602 32768 4 5327 5960 242365 436697 32768 8 8703 9110 595608 375520 32768 16 14829 13918 283742 365894 32768 32 20109 27729 494842 468040 32768 64 22932 29931 715675 352704 32768 128