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 Sep 8 06:52:16 2026 Auto Mode Machine = Linux oleg638-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-oleg638-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 6047 14456 459802 538156 64 8 8310 34079 659861 310759 64 16 12041 50630 939223 735831 64 32 10097 75111 1070292 1232453 64 64 9495 62809 1336792 1679761 128 4 9739 19115 386848 584313 128 8 17297 33880 718889 794416 128 16 20304 58420 901083 498114 128 32 24614 76003 1243315 659704 128 64 27084 98313 1705404 1332828 128 128 16126 129810 1254941 2286447 256 4 14064 21202 729540 630572 256 8 20745 32495 737558 739590 256 16 22676 56824 1202660 917880 256 32 31659 92789 1347557 761623 256 64 34872 112377 1260547 1219045 256 128 42604 139504 1099237 1471270 256 256 43485 155731 1662639 1985448 512 4 17009 24030 800163 768658 512 8 29518 37141 848872 689886 512 16 30631 63888 1015932 1245780 512 32 55030 105694 1227971 1115688 512 64 70250 139811 1595686 1570020 512 128 70078 135987 1524329 1459080 512 256 64119 151756 1595686 2009236 512 512 78504 190113 2089386 2073249 1024 4 16447 22440 619871 534744 1024 8 25863 36170 801777 682195 1024 16 44189 67444 1391395 1370965 1024 32 55695 76343 1245710 1111877 1024 64 87806 141338 1372717 1809317 1024 128 76117 145602 1313122 1254808 1024 256 68022 154424 1927891 1399100 1024 512 83633 182238 1872419 1622698 2048 4 18514 21114 593481 589005 2048 8 30127 34200 1031724 790111 2048 16 48536 58110 1105126 878962 2048 32 59386 79605 1214673 1105837 2048 64 72125 111025 1871932 1190598 2048 128 81321 106054 1311279 1411470 2048 256 62341 145901 1606254 1270548 2048 512 68981 165644 1977058 1495773 4096 4 18344 20992 711977 602616 4096 8 29666 33918 848396 851719 4096 16 44895 66463 1175994 923757 4096 32 57530 85649 1308662 1090521 4096 64 83703 108990 1501368 1326855 4096 128 87111 140138 1569395 1685655 4096 256 84186 128915 1688471 1513670 4096 512 107798 146937 2081196 1550277 8192 4 19613 21977 790809 597085 8192 8 33177 36276 996257 841597 8192 16 48328 56164 1608842 1127443 8192 32 66970 84143 1446554 1350947 8192 64 81999 108022 1759799 1409988 8192 128 83062 141231 1744166 1384479 8192 256 99004 149070 2104369 1644651 8192 512 101220 160423 1875039 1496516 16384 4 18638 20431 677808 769959 16384 8 30919 34675 1014297 994294 16384 16 48701 55014 1170633 1073225 16384 32 65249 74522 1236522 1101665 16384 64 84629 113859 1826343 1359763 16384 128 93690 140696 1728626 1568157 16384 256 98611 157352 2097804 1769897 16384 512 104063 160801 1915802 1801022 32768 4 18934 19862 772264 639623 32768 8 30520 33374 962263 871859 32768 16 45626 53487 1302494 1032942 32768 32 62788 79797 1466128 1259292 32768 64