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: Thu Jul 30 01:28:18 2026 Auto Mode Machine = Linux oleg206-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-oleg206-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 12763 627470 621657 64 8 1750 4628 955947 792299 64 16 803 44503 1183548 987600 64 32 3018 77385 1421755 1279447 64 64 3725 89009 916769 1066042 128 4 1490 3686 735635 283787 128 8 4599 4501 684081 554157 128 16 12829 24961 1152564 621518 128 32 19520 56867 1175271 718889 128 64 14585 84883 1561553 1508887 128 128 16958 87855 1579934 1278855 256 4 9740 9842 717355 398153 256 8 11032 17224 423933 485020 256 16 8357 16154 1248819 703260 256 32 11972 49632 1298662 833776 256 64 15295 61773 1445521 1422540 256 128 6317 124754 1015065 1543163 256 256 10079 68339 1763685 1924938 512 4 4034 5350 664073 457124 512 8 4434 9647 850217 667582 512 16 6688 11022 1242177 1120344 512 32 11336 20572 1267097 1080328 512 64 8461 18311 181362 1108203 512 128 12800 32686 1479181 1410215 512 256 8511 27028 1580419 1012101 512 512 20944 30126 319005 321392 1024 4 2025 2037 748538 162486 1024 8 6178 5022 112390 768082 1024 16 7919 7775 673740 983774 1024 32 12708 20738 738880 325701 1024 64 15689 26863 1363565 168029 1024 128 14620 23312 274004 1197769 1024 256 15427 14955 1049394 1835608 1024 512 37795 72583 1587315 912695 2048 4 4601 4659 334853 229979 2048 8 7969 5943 437507 382304 2048 16 16204 9450 401947 171538 2048 32 16512 31041 764786 484491 2048 64 17004 23452 444365 771656 2048 128 19059 26479 1027159 408873 2048 256 20386 27884 324407 1563282 2048 512 21157 61604 1928672 1731211 4096 4 4509 3288 153207 127924 4096 8 4294 5110 180919 256175 4096 16 5144 7694 179349 295843 4096 32 7613 12977 348209 437048 4096 64 12601 16900 253934 228377 4096 128 15519 22378 1678081 312714 4096 256 18673 21879 186648 1062531 4096 512 18268 32220 1907008 582965 8192 4 3697 4761 595563 385558 8192 8 11348 6726 315317 143860 8192 16 7653 9533 234176 265087 8192 32 10616 15834 487186 351406 8192 64 15285 15080 423646 206482 8192 128 11086 24771 300868 279522 8192 256 22881 47695 1649230 1787074 8192 512 38292 40337 289143 330974 16384 4