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 Aug 27 12:38:01 2026 Auto Mode Machine = Linux oleg636-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-oleg636-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 5422 11849 592827 186051 64 8 3369 6578 392561 852702 64 16 5450 23129 987600 842003 64 32 3634 38250 877797 1210227 64 64 3193 39535 679917 1255511 128 4 6657 14885 455436 313079 128 8 6376 13641 329205 711270 128 16 9837 16258 1142750 285144 128 32 3927 54351 1451764 219596 128 64 6249 97262 1406136 1359835 128 128 9699 117972 1471662 1997245 256 4 5430 3156 661657 346949 256 8 8921 26165 775373 398153 256 16 19189 12088 372076 426798 256 32 18630 23142 1332507 954602 256 64 14329 46595 1112909 1340826 256 128 13495 55448 1619994 1610276 256 256 8341 45030 1718521 2030503 512 4 3487 5123 627404 394482 512 8 5336 16307 613250 737762 512 16 11995 21706 670919 517240 512 32 18173 69631 1163439 743123 512 64 25870 89680 1394645 609421 512 128 24801 138979 1674052 1132755 512 256 25955 47712 360025 1679288 512 512 14647 84640 1740536 2275345 1024 4 5186 7102 116733 150543 1024 8 12374 28689 320213 494424 1024 16 19513 26026 842017 464833 1024 32 20065 34664 989212 568583 1024 64 22547 20004 553560 413542 1024 128 18748 46151 910953 605197 1024 256 39306 64991 955965 409130 1024 512 33696 39676 880512 1738989 2048 4 4902 6049 127688 209169 2048 8 10585 9280 347829 211331 2048 16 18307 21481 584476 586151 2048 32 23487 28613 379316 1057378 2048 64 18070 32578 1280015 211112 2048 128 19966 28626 1311078 466089 2048 256 44822 75335 1054651 1286340 2048 512 19916 30524 547869 1556202 4096 4 4304 7994 280355 333980 4096 8 18852 16734 322011 273339 4096 16 24756 22568 790576 382874 4096 32 22514 31586 423182 519864 4096 64 1515 44677 422703 935579 4096 128 22698 52013 1174306 720003 4096 256 28116 57058 572704 457290 4096 512 34669 50125 1020678 542725 8192 4 6720 8050 258251 167071 8192 8 7286 8448 249368 263814 8192 16 11754 19653 262010 190516 8192 32 20995 35352 720922 504712 8192 64 33389 43881 535075 377634 8192 128 29728 51191 983201 561022 8192 256 30215 45877 729679 799532 8192 512 40171 53603 624770 1093604 16384 4 6415 7472 353370 242148 16384 8 10738 12308 522347 208010 16384 16 15705 15293 609708 343523 16384 32 17771 23494 1034483 638479 16384 64 26685 39110 676127 770321 16384 128 26100 43226 797387 617748 16384 256 36511 42717 626466 445048 16384 512 34814 51836 709049 336883 32768 4 5152 6211 278979 307335 32768 8 10054 8808 537875 342507 32768 16