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: Mon Jul 13 10:02:52 2026 Auto Mode Machine = Linux oleg336-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-oleg336-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 1549 2998 176741 525513 64 8 5030 5136 727850 653436 64 16 7332 47655 1124074 752329 64 32 9448 58231 566551 1310683 64 64 3050 71112 1304314 1562436 128 4 3647 7560 508012 568836 128 8 3575 9836 42734 329004 128 16 5641 23809 962469 753179 128 32 10060 17041 606767 1243315 128 64 7126 105252 1406136 1346196 128 128 5561 61274 1543594 1561553 256 4 6153 10866 251768 368375 256 8 10968 11896 904732 248045 256 16 14173 37696 401878 1019886 256 32 16213 42944 1391207 162030 256 64 18912 70157 1463250 1248819 256 128 11936 83880 1829808 1504249 256 256 21748 57230 1591186 1967260 512 4 2935 3872 506505 232115 512 8 6541 9117 881269 294587 512 16 20174 30832 1270846 946526 512 32 8897 42967 1255246 112801 512 64 30748 36302 917412 1429934 512 128 37066 71678 1492545 1267097 512 256 17174 103200 1441452 241621 512 512 24532 45981 1840480 879825 1024 4 8978 10032 279478 345232 1024 8 8412 23591 788240 217128 1024 16 6896 15354 395055 317210 1024 32 18626 24754 184874 945651 1024 64 40958 25845 720172 1080004 1024 128 25051 41675 1599731 1378002 1024 256 25731 68081 662721 858340 1024 512 27397 44690 1732676 1402756 2048 4 5288 3896 98542 107994 2048 8 8253 11882 338015 353033 2048 16 10852 22203 1167617 597444 2048 32 17730 28726 1341170 402908 2048 64 26007 33583 1458688 1260296 2048 128 28442 49819 1647536 1371798 2048 256 36251 67397 1000947 998503 2048 512 36553 82100 909873 825177 4096 4 5313 6313 231451 327367 4096 8 10863 9833 241311 372093 4096 16 11717 17243 661940 505992 4096 32 13393 27249 1340835 303967 4096 64 16739 32472 684844 303451 4096 128 23638 39379 583242 389206 4096 256 30057 65696 509836 438487 4096 512 30446 32839 733906 513079 8192 4 5835 5258 392392 296855 8192 8 11800 9020 494450 362877 8192 16 13061 14266 598958 647541 8192 32 24559 16183 660970 372092 8192 64 24135 51778 699380 486752 8192 128 29588 39757 758446 675962 8192 256 37689 49722 778994 693830 8192 512 25864 61429 439530 833876 16384 4 6776 6798 313929 281792 16384 8 8387 9264 627381 351512 16384 16 13300 17127 561999 634395 16384 32 23325 21341 764749 626592 16384 64 22751 34411 501774 216396 16384 128 27976 40971 986458 499604 16384 256 41963 45343 613474 511504 16384 512 37066 66163 442561 623963 32768 4 5342 5489 211437 205041 32768 8 9330 9805 315930 253581 32768 16