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 Aug 24 16:39:54 2026 Auto Mode Machine = Linux oleg201-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-oleg201-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 4089 14007 653436 484710 64 8 3609 20479 799377 639427 64 16 4930 7647 127232 532815 64 32 5531 48817 1143223 418250 64 64 4604 55996 1452528 1492919 128 4 1791 11022 481150 509943 128 8 1615 6961 359398 699227 128 16 6795 17362 1123617 895074 128 32 6124 12148 948860 809997 128 64 2218 96389 1155043 1254941 128 128 12364 29117 1229084 1471662 256 4 5088 3263 285129 371048 256 8 7743 12712 787890 485678 256 16 20440 38312 1128110 910872 256 32 17114 51415 1325925 1108314 256 64 10225 47849 1137672 1213534 256 128 7256 55016 1044693 55724 256 256 25607 178249 1570244 3159869 512 4 2823 5260 409605 565751 512 8 17685 21312 734482 454705 512 16 17467 36813 474497 856319 512 32 20900 53691 1187895 635198 512 64 12587 46843 1252318 1201856 512 128 20812 26458 856319 173972 512 256 9429 42384 1484293 1196499 512 512 16823 129516 2049505 1333173 1024 4 10301 13262 209186 206163 1024 8 13535 8781 720172 405231 1024 16 25706 28432 1016847 231038 1024 32 30932 64313 702847 291979 1024 64 19844 44774 761950 983774 1024 128 16520 94596 904621 1268896 1024 256 27013 70880 1572783 1250425 1024 512 83673 139357 1917562 1546729 2048 4 8540 8014 376408 235374 2048 8 18331 21023 190956 693026 2048 16 22627 25938 664094 870412 2048 32 25431 39635 608059 664968 2048 64 26835 44287 486714 678627 2048 128 26963 55508 486825 934724 2048 256 30109 46767 1399740 644222 2048 512 43903 55219 1070022 528487 4096 4 7176 5692 395942 215646 4096 8 11119 11356 332467 371586 4096 16 18450 19508 405263 308969 4096 32 15618 43071 580012 1162309 4096 64 20776 34736 813332 661074 4096 128 35908 22085 323868 371787 4096 256 23550 40153 783331 197415 4096 512 34238 84808 862148 845932 8192 4 6844 6609 231352 139148 8192 8 10390 9651 423468 274706 8192 16 17027 21557 1135716 395312 8192 32 20095 39476 403251 653167 8192 64 30551 47986 800556 566956 8192 128 26991 33523 297879 569673 8192 256 33126 59681 883697 570439 8192 512 37293 65136 988917 467709 16384 4 6404 9166 241976 282088 16384 8 9653 13094 677728 540422 16384 16 18476 21089 655177 290311 16384 32 21940 24660 574775 551021 16384 64 31879 38162 630275 758620 16384 128 32554 55777 563256 748783 16384 256 41423 55214 683573 893205 16384 512 41123 70857 457794 594228 32768 4 6562 6619 237191 211853 32768 8 11427 12387 391521 393907 32768 16 16422 17412 219126 334207 32768 32 22278 32261 319335 554525 32768 64