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: Fri Sep 18 01:28:28 2026 Auto Mode Machine = Linux oleg252-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-oleg252-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 2879 8871 571375 639427 64 8 3034 11502 1452528 789967 64 16 3233 37164 1204796 127716 64 32 7763 67297 1363961 542506 64 64 3893 46653 1722886 1722886 128 4 3783 7258 1185654 672934 128 8 4571 14937 387686 386570 128 16 13228 31519 1243315 990891 128 32 5440 86025 1165070 1939522 128 64 12659 85682 1471662 1508887 128 128 15959 120976 1000121 1852520 256 4 10963 14349 570288 459687 256 8 11100 18147 969251 682691 256 16 10578 26814 141211 197676 256 32 17875 43685 1437779 1202660 256 64 7559 57840 1089202 1340826 256 128 16346 72258 1479379 1591186 256 256 13869 50584 2754556 1453348 512 4 6587 12052 640694 205543 512 8 5360 12906 432106 263242 512 16 20915 20094 630536 201022 512 32 15843 41974 255750 665926 512 64 22350 80693 342675 1174254 512 128 25215 65032 793657 1282994 512 256 15270 73990 1261144 1940253 512 512 21695 85776 619978 2150051 1024 4 7354 4761 696578 255245 1024 8 10158 16365 729840 450687 1024 16 17062 29039 908640 488130 1024 32 27512 26845 1073257 239023 1024 64 28872 48367 565439 1430318 1024 128 20664 70634 1197769 1865101 1024 256 30051 74662 1544504 573365 1024 512 36661 102987 1878973 1200447 2048 4 5946 6310 600241 577055 2048 8 8727 14419 534306 511372 2048 16 24439 23518 543639 795599 2048 32 31912 36353 947195 306358 2048 64 27335 80430 395524 803112 2048 128 44730 81415 1008823 1219675 2048 256 57889 84370 1111274 1043885 2048 512 47670 78636 1597293 795673 4096 4 8752 10677 274146 294126 4096 8 15405 12890 582806 604035 4096 16 19183 30923 994907 812025 4096 32 17899 36690 426576 585727 4096 64 28222 68241 1069210 801868 4096 128 29910 61179 1842581 563167 4096 256 36026 71538 517032 452544 4096 512 53397 69526 938390 670282 8192 4 7612 9268 384527 211991 8192 8 13159 17263 519894 580952 8192 16 25914 21427 1185726 832704 8192 32 26250 29437 324642 611799 8192 64 44635 27484 487996 675245 8192 128 35922 46392 637155 635387 8192 256 44288 48320 876796 538631 8192 512 32640 71919 477558 1445337 16384 4 3319 8718 395537 289097 16384 8 10216 11271 768014 306592 16384 16 21329 24393 724577 1113572 16384 32 28676 31517 656147 626683 16384 64 31254 39910 919056 631660 16384 128 38336 53916 641376 843796 16384 256 45624 65448 512415 1424066 16384 512 43207 62090 1491217 942036 32768 4 10397 9472 406137 438344 32768 8 15145 18834 471841 361303 32768 16 27983 31699 554751 885572 32768 32 33664 31510 629210 570632 32768 64 33437 59807 961697 917049 32768 128 48773 62144 1035775 689069 32768 256 51084 76617 1121083 1173139 32768 512 42893 70880 1166954 626502 65536 4 11714 11355 373354 417775 65536 8 17668 24073 522061 326473 65536 16