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 Apr 14 15:55:24 2026 Auto Mode Machine = Linux oleg249-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-oleg249-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 2348 19602 615952 481234 64 8 2692 21599 666414 771797 64 16 2559 58281 1029254 520419 64 32 3662 37803 561808 852702 64 64 2659 84418 1310683 1013707 128 4 6840 21174 280086 535368 128 8 9043 19468 805138 336848 128 16 15212 58900 1833539 895074 128 32 6168 40455 1269781 52159 128 64 10983 78919 355589 1278855 128 128 10677 41692 1487977 256042 256 4 4973 8714 403843 518263 256 8 4743 31321 927393 695516 256 16 10987 31056 428159 873098 256 32 12526 36797 1224606 663292 256 64 18415 71669 1274008 1108314 256 128 9765 109166 1319408 1354356 256 256 10868 61522 596587 1729594 512 4 4003 4170 145999 48229 512 8 6679 6383 165524 700463 512 16 8352 19086 282088 832743 512 32 13197 22692 625941 1003588 512 64 8128 45894 1289930 1169140 512 128 16099 59730 1500891 1344020 512 256 11504 39354 1585086 1550747 512 512 10391 57123 531055 1815584 1024 4 4057 4109 613233 407151 1024 8 11138 17970 591609 760870 1024 16 20010 33201 1000969 603411 1024 32 11098 10141 337845 580808 1024 64 10972 18835 317820 230989 1024 128 14907 27012 310491 75845 1024 256 19642 45643 1448650 439841 1024 512 12641 36604 657748 1633188 2048 4 4954 4832 257485 262698 2048 8 4570 9166 462202 258065 2048 16 11162 6529 422882 327887 2048 32 20525 29948 577404 334527 2048 64 18586 27471 1437211 1247122 2048 128 33907 38423 710628 781912 2048 256 18576 28893 757436 660418 2048 512 26244 58234 1045537 1219675 4096 4 5043 4689 181069 102608 4096 8 6942 10947 248573 190131 4096 16 28335 33216 586387 484379 4096 32 16464 12650 1085286 491952 4096 64 22992 27618 704040 222255 4096 128 34357 1365 1582697 273687 4096 256 42229 37791 694478 357193 4096 512 27977 37696 1658960 1189345 8192 4 5026 5725 670593 508974 8192 8 14931 8452 355063 164158 8192 16 23208 26294 787547 635434 8192 32 26158 32774 1098147 328493 8192 64 51445 53831 1782069 1591627 8192 128 72054 33797 909401 864944 8192 256 81982 69253 641401 372516 8192 512 36816 37641 490329 693830 16384 4 9468 8013 182228 158607 16384 8 10267 20706 555296 384854 16384 16 21087 26602 653371 314840 16384 32 20222 28786 517743 372906 16384 64 39759 26001 827558 738849 16384 128 30371 36852 344714 600207 16384 256 28067 52155 758243 773817 16384 512 27092 34859 474032 420079 32768 4 6120 8216 284035 290555 32768 8 10869 11345 885452 575482 32768 16 15864 13346 359451 251542 32768 32 24905 40830 237468 523282 32768 64 22664 31403 1117791 474135 32768 128 54412 34480 497758 490773 32768 256