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: Wed Aug 12 15:52:07 2026 Auto Mode Machine = Linux oleg319-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-oleg319-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 3586 6768 290890 561808 64 8 2975 15616 763021 279676 64 16 4280 21136 1124074 1163036 64 32 4006 44195 1421755 164906 64 64 2293 32684 1210227 1947927 128 4 4092 9312 78240 368779 128 8 4328 10651 876086 609522 128 16 4818 25524 1142750 1040839 128 32 9500 37156 1373754 272411 128 64 7328 32242 1102844 1421023 128 128 6199 88101 1471662 1332828 256 4 2904 3748 641497 199217 256 8 2517 11073 773697 93427 256 16 4849 13601 1132871 1089202 256 32 11293 15953 1334162 1163562 256 64 5716 15682 1334162 1248819 256 128 3808 31387 1340826 910872 256 256 8155 27222 850282 1952947 512 4 3505 2606 130381 526111 512 8 4141 5084 65506 744153 512 16 7871 10267 1130370 925717 512 32 9098 11877 523418 745186 512 64 9349 15947 1402845 806474 512 128 7384 28763 229289 1492545 512 256 21250 78204 1406520 1759070 512 512 27358 93361 1753325 828566 1024 4 7831 6211 171868 150148 1024 8 6371 8424 912695 321508 1024 16 13338 41502 1029275 893517 1024 32 19601 24356 1159609 634429 1024 64 13703 41676 1363565 260225 1024 128 33345 75493 1127937 1095150 1024 256 53458 58082 1686413 704230 1024 512 52273 54689 667458 546725 2048 4 3658 13155 270142 238497 2048 8 5044 11648 216721 822805 2048 16 11617 8929 450399 494333 2048 32 12927 14811 242654 487266 2048 64 14621 16547 369287 1179643 2048 128 12092 34261 1667687 412743 2048 256 22057 24582 491476 287810 2048 512 26091 39723 1810768 756568 4096 4 10974 11354 181898 237268 4096 8 10888 6762 495699 258274 4096 16 12222 14650 719852 291012 4096 32 29805 32317 841374 1130566 4096 64 34128 22514 1410057 617141 4096 128 28038 44658 568741 836784 4096 256 34655 62136 1060629 339920 4096 512 35773 36462 1673830 664166 8192 4 2181 9720 303338 296008 8192 8 8990 19415 1079483 959131 8192 16 11828 14019 297998 186759 8192 32 21509 17932 427935 405808 8192 64 19675 24651 390000 597864 8192 128 18316 34262 685128 875300 8192 256 37239 42502 675192 823307 8192 512 35440 34332 386304 488114 16384 4 4733 4606 178249 185006 16384 8 8107 7887 322686 459579 16384 16 11628 12384 508487 278905 16384 32 15427 22371 599642 628609 16384 64 21149 30736 517431 535704 16384 128 32583 31206 591288 755683 16384 256 43661 43109 895883 488988 16384 512 32195 36839 1067639 846895 32768 4 5671 6465 233345 192458 32768 8 8581 10478 503519 393340 32768 16 12912 16481 441761 411901 32768 32