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: Sat Aug 22 06:28:04 2026 Auto Mode Machine = Linux oleg604-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-oleg604-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 2501 9593 140335 551422 64 8 3211 13817 681644 653436 64 16 4208 12045 508587 877797 64 32 4184 35335 399573 926260 64 64 2607 54941 1124074 1679761 128 4 3644 10060 584950 524387 128 8 5849 17909 780556 695603 128 16 4342 22288 953918 843068 128 32 3699 48762 870405 715059 128 64 8753 54472 1111981 883293 128 128 4007 59422 870405 1827299 256 4 2554 8074 263636 194807 256 8 7788 14721 723153 630572 256 16 5890 11568 778183 773697 256 32 9266 21514 1280084 309185 256 64 10840 40730 654399 876662 256 128 5352 70019 646518 1506359 256 256 12126 104573 1327564 2065659 512 4 4815 5521 71640 447970 512 8 8036 7314 304227 180661 512 16 10220 10023 757541 111767 512 32 7687 14789 1120344 696600 512 64 8202 29831 679195 898225 512 128 14418 64475 1422357 535024 512 256 23180 14175 87087 1510391 512 512 9691 52026 1365383 1624659 1024 4 3307 7360 222562 555349 1024 8 15006 14547 178341 185681 1024 16 13612 21789 864212 585799 1024 32 15195 22748 1221964 540941 1024 64 18907 20379 862650 987392 1024 128 24789 70354 1475525 539243 1024 256 21375 55315 503229 737104 1024 512 21193 30553 479412 1329791 2048 4 7982 3213 243459 89911 2048 8 5439 7871 323943 161310 2048 16 10438 14125 256770 250890 2048 32 24388 35276 514959 501842 2048 64 32652 38622 731194 507565 2048 128 20937 49677 835937 289634 2048 256 17049 50715 344371 1366125 2048 512 20197 38639 1469167 1252577 4096 4 6827 4819 255027 186266 4096 8 8407 12795 241141 227910 4096 16 5859 9692 206191 330879 4096 32 17781 19915 640805 931571 4096 64 15314 22985 1050576 347329 4096 128 21126 24024 230878 368281 4096 256 38891 67731 1047309 1101640 4096 512 34034 46607 1128338 680854 8192 4 5912 5046 245423 297165 8192 8 9598 8786 434104 246449 8192 16 12472 10955 212663 295111 8192 32 9932 13106 299601 604001 8192 64 34242 23415 842195 771231 8192 128 39240 40661 567162 347898 8192 256 38904 40045 925644 607622 8192 512 29162 43445 960015 796972 16384 4 4742 5257 320864 258300 16384 8 10358 9595 737287 313551 16384 16 20415 15868 571767 415595 16384 32 20927 21801 837411 537762 16384 64 16689 24365 526901 406016 16384 128 23155 32356 748164 574127 16384 256 25441 31813 883797 492959 16384 512 30477 34377 769959 727084 32768 4 3899 4312 143514 206838 32768 8