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 May 15 06:04:54 2026 Auto Mode Machine = Linux oleg434-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-oleg434-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 5008 16653 587635 524487 64 8 7923 26889 852702 752329 64 16 9956 42441 926260 1013707 64 32 9862 54517 1255511 1232453 64 64 7862 96082 1232453 3363612 128 4 10010 14953 776042 633995 128 8 16922 29006 969421 785122 128 16 11900 43067 992724 753179 128 32 22792 64351 1421023 935631 128 64 11634 64809 1278855 1377278 128 128 18032 102636 1598754 2004703 256 4 12371 17064 894929 790209 256 8 16402 28378 1673001 859127 256 16 27488 46656 1099237 1157291 256 32 25194 68413 1286217 1237306 256 64 22428 100624 1345868 780445 256 128 30869 101193 1523457 1842366 256 256 23562 109122 1514860 1938842 512 4 12524 18453 620694 588544 512 8 15694 28346 926116 641651 512 16 25901 47539 1127402 1493584 512 32 33866 73393 1570020 967855 512 64 36657 99278 571472 1347393 512 128 42841 111062 1840480 1075998 512 256 50004 105068 1565443 470546 512 512 43418 112878 1537424 2572435 1024 4 14024 17211 568583 698504 1024 8 25534 29870 1001903 859714 1024 16 32961 51217 1276817 944612 1024 32 41943 73065 715493 1136593 1024 64 41977 99561 1356674 1592612 1024 128 50425 106644 1718120 1349428 1024 256 56029 131995 1612342 1617808 1024 512 65252 144939 1787480 1828574 2048 4 15466 17733 662762 611304 2048 8 23743 30806 1003988 999549 2048 16 37913 49987 1127760 1321364 2048 32 50460 69895 1536439 1213986 2048 64 58757 96635 1756343 1262519 2048 128 69207 123417 1825390 1397008 2048 256 57052 138951 1832009 1529599 2048 512 78506 141338 1762469 1512364 4096 4 15942 16947 729481 734973 4096 8 25701 31389 825328 863231 4096 16 41775 51769 1403721 1297494 4096 32 59226 76268 1359402 1229345 4096 64 74470 100068 1556315 1567534 4096 128 76480 115027 974312 1502024 4096 256 79074 125268 1317494 995830 4096 512 89278 134878 1633252 1663780 8192 4 15597 17341 767475 760915 8192 8 27162 28287 1017258 845490 8192 16 41987 49121 1254929 1178891 8192 32 56889 71414 1231496 1345814 8192 64 74647 102492 1671859 1589418 8192 128 77213 115243 1642999 1318748 8192 256 86603 116251 2049516 1468628 8192 512 78332 114645 1785588 1789774 16384 4 15075 16222 836259 678705 16384 8 26478 29882 1117611 968619 16384 16 43661 49869 1177352 1102036 16384 32 60209 73330 1623314 1117284 16384 64 76923 97471 1607367 1332242 16384 128 78829 110266 1516591 1290874 16384 256 89468 124160 1937298 1734647 16384 512 90061 128041 1439217 1435429 32768 4 15891 16635 733591 689242 32768 8