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: Mon Aug 17 06:30:06 2026 Auto Mode Machine = Linux oleg341-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-oleg341-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 1346 4624 62809 444572 64 8 2591 13751 752329 592827 64 16 4197 26250 926260 863676 64 32 7488 38882 799377 852702 64 64 7582 51994 1279447 1484662 128 4 2136 14338 492178 533241 128 8 2592 4318 650117 795593 128 16 3027 10478 413039 978253 128 32 12709 54655 1363288 1152564 128 64 8272 72650 1196221 1266785 128 128 8096 76240 265671 2027414 256 4 4377 12641 650041 528987 256 8 11827 15346 750445 606700 256 16 15851 29213 1201314 217894 256 32 6171 32019 178783 1044693 256 64 23741 57410 1471270 1755037 256 128 19427 58406 1696795 1445521 256 256 8766 16621 1662639 2726577 512 4 3874 4422 133543 363930 512 8 10336 19875 701378 630536 512 16 19894 11380 1155302 922535 512 32 10990 30772 399992 1064266 512 64 22540 37956 1501940 1242896 512 128 14320 94887 632952 354089 512 256 23401 137300 1619757 594079 512 512 12047 72235 678980 1300082 1024 4 14870 9281 552918 317538 1024 8 7131 25501 712644 358936 1024 16 7800 22636 652650 328843 1024 32 30152 42976 1360111 948157 1024 64 25104 78305 995171 516172 1024 128 23684 71289 929283 1065535 1024 256 34342 44423 350214 444806 1024 512 52526 75101 686337 1711956 2048 4 7158 6682 172534 174062 2048 8 10120 9760 255905 374553 2048 16 10078 12362 563725 461481 2048 32 15871 21079 733818 446281 2048 64 19558 53026 1299377 707700 2048 128 20861 37669 1362658 1282499 2048 256 18406 29867 608619 457963 2048 512 32814 84971 1741389 495645 4096 4 5427 5128 243503 195011 4096 8 1277 11338 260246 519142 4096 16 17116 21329 724956 314668 4096 32 13812 18899 569835 439767 4096 64 33873 35476 600048 1157376 4096 128 35339 38031 529886 277677 4096 256 28489 35434 388177 319680 4096 512 34393 41109 1137151 840387 8192 4 7076 6004 218797 176780 8192 8 8063 9950 496515 492275 8192 16 13689 13637 446115 377356 8192 32 19394 24663 439153 572501 8192 64 23858 40185 885633 411450 8192 128 33611 51200 689209 655259 8192 256 40842 50363 878972 1081896 8192 512 34572 77440 803608 502601 16384 4 7325 7632 409938 285744 16384 8 11701 13260 451460 462549 16384 16 16056 20267 563256 858030 16384 32 21756 25544 733980 776940 16384 64 24726 33980 607423 586209 16384 128 38756 40928 811847 380837 16384 256 38432 44292 971014 396475 16384 512 40265 49666 592486 388311 32768 4 5963 5809 241235 210875 32768 8 8985 11207 483667 278095 32768 16