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 15 17:59:28 2026 Auto Mode Machine = Linux oleg430-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-oleg430-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 4165 12215 615952 516414 64 8 5076 18545 769584 551422 64 16 7944 35279 1083249 852702 64 32 8022 25941 511494 695778 64 64 2232 15980 1279447 1648808 128 4 2384 3426 672934 188786 128 8 3133 7416 771581 757430 128 16 7648 12247 226164 947186 128 32 14474 67051 1642783 731625 128 64 8762 29176 1436229 727658 128 128 9705 41330 1306873 2248149 256 4 7339 6031 620012 339061 256 8 4271 9790 541253 703721 256 16 6609 13069 723153 719277 256 32 22069 34491 1306564 1004618 256 64 13100 63195 1384034 820398 256 128 15572 34973 1430119 947860 256 256 18977 90459 1619994 447428 512 4 8728 4039 427376 434994 512 8 9107 7264 543555 705294 512 16 20737 33192 1103647 929322 512 32 18560 44279 1339827 686358 512 64 28632 45455 1100818 1055894 512 128 23024 26349 664073 1402845 512 256 13964 35381 653961 1344020 512 512 23686 66979 613075 188445 1024 4 4055 7594 168477 565141 1024 8 9991 10257 118381 246754 1024 16 16130 23553 646461 512232 1024 32 22103 36111 857654 1050164 1024 64 36399 53957 1340164 461288 1024 128 28133 54494 1464956 412074 1024 256 14945 52124 506672 809484 1024 512 22522 35928 801927 1535668 2048 4 4958 6692 262089 218452 2048 8 8379 11945 427555 198332 2048 16 10093 12423 1101159 388846 2048 32 14862 13754 1346425 1074573 2048 64 18011 26842 750159 311909 2048 128 39889 33606 739886 675904 2048 256 30804 45516 1077945 722097 2048 512 36663 82034 1109981 1527152 4096 4 5125 5187 290456 236559 4096 8 11431 9852 286494 228137 4096 16 12033 18273 690625 482271 4096 32 16152 29383 677124 623434 4096 64 30642 37279 548705 562945 4096 128 36935 29873 1074493 878414 4096 256 20528 30028 554335 729977 4096 512 39983 71549 1000236 589607 8192 4 5383 6544 188080 174539 8192 8 11880 10073 427111 348788 8192 16 15204 30608 657932 550868 8192 32 20773 24875 609206 423599 8192 64 24512 38309 776933 653950 8192 128 28612 32018 778923 581031 8192 256 32578 28113 1284245 562059 8192 512 29390 47542 483648 597562 16384 4 4740 5277 261203 208524 16384 8 9015 10444 258068 292707 16384 16 14377 22223 468889 590927 16384 32 22743 24864 550686 469591 16384 64 30166 38731 911485 846186 16384 128 33136 57635 793575 899530 16384 256 39935 59059 1036292 884901 16384 512 42787 56456 453023 559733 32768 4 6506 6710 315656 207953 32768 8 9997 11788 521352 394153 32768 16 13416 18546 854513 676706 32768 32